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® http://www.3com.c om/ Of ficeConnect™ Remote 840 SDSL Router User’ s Guide Rel eas e 1.2 .0 Part No. 10031396 Rev . AA May 200 0 840ug.book Page 1 Friday, July 7, 2000 2:23 PM.
3Com Corporation 5400 Bay fr ont Plaza Santa Clara, California 95052-81 45 Copyri ght © 199 8, 3Com Corpor ation. A ll right s reserved. No pa rt of thi s docum entation may be reproduced in any form.
A BOUT T HIS G UID E Introduction 1 How to Use This Gu ide 2 Convent ions 2 Document No tation 3 Safety In formatio n 4 Additio nal S afety Informat ion 5 Y ear 2000 Com pliance 5 1 O VERVIEW Introduc.
Back Pa nel 1 - 11 Configu ratio n Overvie w 1 - 13 Gener al Config urati on Steps 1 - 13 How to Ma nage the Of fice Conne ct Remot e 84 0 1 - 14 Starti ng the O fficeConnect Remot e 840 Man ager 1 - .
Addi ng a Rem ote Site Pr ofile 3 - 2 Modifyin g a Remote Si te Pr o file 3 - 3 Deleti ng a Remote Si te Pr ofile 3 - 3 Configu ring Ne twor k Service Inform ation (P PP / RFC 1483 / RFC 1490) 3 - 4 F.
Ping Respo nses 4 - 15 DNS Er rors 4 - 15 Opti on 2: DOS Pi ng to ISP or Remo te S ite Net work 4 - 16 Opt ion 3: I nterne t Br owser ( Int er net Ac ces s On ly ) 4 - 17 Advan ced T roubleshoo ting 4.
Conf igur in g the P A T Defaul t Addr ess 6 - 2 Configu ring Stat ic P A T Po rt En tries 6 - 3 Configu ring NA T 6 - 4 Monitoring 6 - 5 7 C ONFI GURI NG DHCP Introduction 7 -1 DHCP O verv iew 7 -1 C.
Configu ring IPX for Remote Sites C onnectio n 9 - 3 Conf igu re the R emo te Si te I PX N etw ork Inf orma tion 9 - 4 Configu ring IPX S tatic and Fram ed Rou tes 9 - 5 Adding a Stati c IPX Rout e to.
11 - 5 Interf ace Status 11 - 5 A TM Sta tus 11 - 5 A TM Cell Status 11 - 5 SDSL T ransceive r Statu s 11 - 6 Remote Si te Connect ion 11 - 7 Connect ion T raffic/Error Counter s 11 - 7 A TM Site Coun.
Filteri ng Overvi ew 12 - 1 Filt ering Capa bili ties 1 2 - 2 Filter Cl ass es 12 - 2 Filter T ype s 12 - 2 Data Filt ers 12 - 2 Advertisement Filters 12 - 3 Generic Filters 12 - 3 Cr eating Filters O.
A B RIDGING AND R OUTING Introdu ctio n A -1 Bridgin g and Routing Con cep ts A -1 Guideline s for Choo sing B ridging or Rout ing A -2 How Bridg es Lear n A -2 Bridgin g Bet ween R emot e Site s A -3.
C A DDRESS T RA NS LAT I ON T UTORIAL Overview C -1 Netwo rk A ddress T ran slat ion (N A T) C -2 NA T Example C -2 Dynam ic NA T C -3 Stat ic NA T C -4 Port A dd ress T ransla tio n (P A T) C - 4 P A.
Step 6 : Config uring a Local B ridge Netw ork E - 13 Usin g the Co nfigur ation A udit E - 13 Saving the Confi guration E - 14 T e stin g the Conf iguration E - 14 F TECHNICAL SUPPORT Online T echnic.
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A BOUT T HIS G UIDE Int r oduction Th is guid e describes the featur es and advanced con figur ation of the Of ficeConnect Remote 8 40 SD SL R outer . The guide i s i ntended for both first-time and experien ced compu ter net work use rs who are usin g the Of ficeConnect Remote 8 40.
2 A BOUT T HIS G UIDE How to Use This Guide This tab le shows wher e to find specific inf ormation i n this guid e. These and ot her user guid es and r elease notes ar e available in Adobe Acr obat Reader Portabl e Docume nt Format (PDF ) or HT ML on the 3Co m Worl d W id e Web si t e: http://www.
Document Notatio n 3 T able 2 T ext Convention Document Notation References to specif ic OfficeConnec t Remote 840 Ma nager p ages in this docum ent will us e a speci fic no tation to describe the l ocation of a page r elat ive to the Of ficeConnect Remo te 840 Manager home page.
4 A BOUT T HIS G UIDE woul d acc ess th e IP su b-m enu. F inal ly , from the I P sub -menu , you woul d access the ARP T able page. This is specifi ed as Monitor > Network s > IP > ARP T able .
Year 20 00 Complianc e 5 ■ Do not use a tel ephon e that is connec t ed to the uni t (o ther than a cordless type) du ring an electrical storm. T here may be a remote ri sk of el ectric s hock fr om lightning. ■ Do not spi ll fo od or liqu ids on the unit.
6 A BOUT T HIS G UIDE 840ug.book Page 6 Friday, July 7, 2000 2:23 PM.
1 O VERVIEW Int r oduction Th is chapter pr ovides an overview of t he Offi ceConnect Remote 84 0. It contai ns the fol lowin g sectio ns: ■ “What Is the OfficeConnect Rem ote 840?” ■ “What .
1-2 C HAPTER 1: O VE RVIEW ■ “Wher e to Fi nd Mor e Config uration I nformati on” What Is the Of ficeConn ect Remote 840? The Of ficeConnect Rem ote 840 is a stand-a lone BRo uter with data interf aces to a Local Ar ea Network (L A N) and a Wide Area Net work (W AN).
What i s an SD SL Mod em? 1-3 pr oto cols as well as br idgin g, with s upport for lea rning bridg e and 802.1d spanning tr ee functi onali ty to eli minat e lo ops. Other imp ortant featu re s includ e: Routi ng Inf ormat ion Pr otocol (RIP ), Simpl e Netwo rk Manage ment Pr otocol (SNMP ), addr ess translat ion, telnet , and pa cket filt ering.
1-4 C HAPTER 1: O VE RVIEW What is a BRou ter? A BRout er is an interface bet ween t wo netwo rks, functi oning as a r outer and/or a bridge. A r outer finds the best r oute between net works an d provides n etwo rk m anage ment capa bilitie s.
What is a Re mote Si te? 1-5 MAC laye r addr esses ar e pre-pe nded in the ethernet h eader o ver the W ide Ar ea Connection s. Addres s Resol ution proce dures (AR P), ar e used to dy namically lear n the MAC addr ess of t he r emote r outer .
1-6 C HAPTER 1: O VE RVIEW within t he same subnet. When th e local side of the W AN in terfac e has an assign ed addres s, it is r efe rr ed to as being "n umbere d.
What is RFC 1490 ? 1- 7 conne ction. RFC 1483 i s a condui t for mul tiple prot ocols such as I P and IPX, which ar e encapsulate d and passed acr oss the communications datali nk. The Of ficeConnect Rem ote 840 suppor ts RFC 14 83 and can establ ish a RFC 14 83 conne ction to other devices su pporti ng RFC 1483.
1-8 C HAPTER 1: O VE RVIEW with an IP addr ess for the workst ation an d the IP addr esses of the default router and Do main Name S erver . The O ff iceConn ect Remote 840 c an be conf igur ed to be a DH CP Ser ver , with a poo l of up to 40 IP addr esses.
What Is D efault Brid ge Mode? 1-9 you choos e this boot opt ion, yo u will set up your wor kstati on(s) for automati c IP addr ess assignment. What Is Default Bridge Mo de? The secon d oper ational mode is Defaul t Bridge Mode. Th is mode preconf igures the unit to brid ge all packe ts.
1-10 C HAPTER 1: O VERVI EW Of ficeConn ect Remote 84 0 Pan el Features All LED a nd status inform ation can be found on the fr ont panel of t he unit, wh ile the power j ack and ports are located on the back of the uni t.
OfficeCo nnect Remote 840 Panel Featu res 1-11 Back Pa nel Below is a r epresent ation of the back pa nel of your SDSL r outer: Figure 1–5 Of ficeConnect Remote 840 Back Panel ■ Power Inlet — The power port attaches to an external, 15 -volt DC power supp ly incl uded with t he Of ficeConnect Remote 840 pa ckage.
1-12 C HAPTER 1: O VERVI EW configu rations . See the tabl e below for in formati on abou t which switches to se t for whi ch con figurat ions. T able 1–2 DIP Switch Modes ■ DHC P Smar t Mod e —.
Confi gurati on Over view 1-13 Conf igura tion Overview The Of fi ceConnect Remote 840 configur ation is divid ed into t hr ee ar eas: Local Site (L AN), Remo te Site (W AN ), an d Glob al co nfigura tion. The follow ing show s the areas of c onfigu ratio n for each.
1-14 C HAPTER 1: O VERVI EW ■ T es t the net work accessi bili ty . ■ Ping a r emote site ■ Check th e r outi ng tabl es on confi gured pr otocols How to Manag e the Of ficeConn ect Remote 840 Y ou can manage the O f ficeConne ct Remo te 840 eit her thr ough the Command L i ne In terfa ce (CL I) or thr ough a web br owser .
Starting the OfficeConn ect Remote 84 0 Manage r 1-15 Starting th e Of fi ceCo nnec t Remote 840 Mana ger T o access the Of ficeConn ect Remote 8 40 Manage r , eith er enter the u nit's LAN I P add r ess o r DNS host name into t he L ocation or Addr ess field of your web br owser .
1-16 C HAPTER 1: O VERVI EW Using the Of ficeConn ect Remote 840 Mana ger All Of ficeConnect Remo te 840 Manag er scr eens have thr ee basic ar eas: ■ Head er — Shows the tit le of the curr ent page b eing access ed.
Where to Find More Configu ration Informatio n 1-17 Online He lp The Of ficeC onnect Rem o te 840 Mana ger pr ovides two meth ods of obtai ning he lp. ■ The Online User's Guide . Th is guid e contain s detail ed info r matio n about co nfiguring an d using you r Of ficeConnect Remote 840.
1-18 C HAPTER 1: O VERVI EW 840ug.book Page 18 Friday, July 7, 2000 2:23 PM.
2 S YSTEM A DMINISTRATI ON Performin g System Adminis tratio n Ta s k s This sectio n descri bes the details for perf orming the fo llowing S ystem Administrati on O fficeConnect Rem ote 840 Ma nager .
2-2 C HAPTER 2: S YSTEM A DMINISTRATION Addi ng a Log in 1 From the hom e page , select Con figuratio n > Glob al > Adm inistrator > Logi n . Click Add . The follo wing scr een fields appear: 2 Enter the fol lowing fie lds: ■ User Name — En ter th e logi n or T elnet use r name in thi s fiel d.
Modifying the Date and T ime 2- 3 Modifying the Date and Time This allo ws you to modify the system dat e and time. 1 Fr om the home page, select Configuratio n > Glob al > Adm inistrator > Date and Time .
2-4 C HAPTER 2: S YSTEM A DMINISTRATION ■ Reset button on the back of the uni t. Using the Of ficeConn ect Remote 840 Mana ger t o R est or e Defaults 1 Select T ools > Rebo ot . 2 Select the Delete all c onfigura tion and reboot d evice i nformat ion option .
Controlli ng SNMP Access 2-5 stati ons. The se stati ons, t he SNMP Manag ers, query the manage d units for conf igurat ion an d monitor ing inf ormati on. The Of ficeConnect Rem ote 840 c an be manag ed by SNMP Ma nagers in read-only or re ad-write mode .
2-6 C HAPTER 2: S YSTEM A DMINISTRATION 4 Repea t steps 1-3 for each manage ment stat ion whi ch is a par t of this communit y . Be careful to have the Access box chec ked the same for each new member of the communi ty . The entire community will be given the access rights of the last member .
Assi gnin g SNM P Trap Mana ger s 2-7 Assign ing SNM P T rap M anager s An SNMP tr ap is an e vent that causes the OfficeConnect R emote 840 to send an unsol icited message to a SNMP manage r . These event s ar e genera lly crit ical e vents that i ndicate an operati onal pr oblem.
2-8 C HAPTER 2: S YSTEM A DMINISTRATION Assign ing Sys log Mana gers A Syslo g mana ger is a w orks tatio n that acc ept s and sa ves info rmat ional messages fr om a network device.
3 R EMOTE S ITE M AN AGEMENT Int r oduction This cha pter pr ovides an overview on mana ging remote site pr ofiles using the web br owser based Of ficeConnect R emote 840 Manag er . If you nee d inform atio n on s etting up or in itiall y c onfigu ring the unit, s ee th e Of ficeConnect Remote 840 SD SL Route r Inst allat ion Guid e.
3-2 C HAPTER 3: R EMOTE S ITE M ANAGEMENT ■ IPX — IPX netwo rk addr ess inform ation, stat ic r outes and servi ces, and RIP us age. ■ Bridging — B ridgi ng (en able / dis able) to th e remote site.
Managi ng a R emote Site Profil e 3- 3 4 Click Add . Then cli ck Save Confi gur atio n on the s ide bar t o permanentl y save the chang es. The Netwo rk Service (PPP and RFC 1483/ RFC 14 90), A TM, and networ k proto col ( Bridgin g, I P , a nd IP X) in forma tion has n ot be en co nfig ured y et.
3-4 C HAPTER 3: R EMOTE S ITE M ANAGEMENT Conf igurin g Network Se rvice Information (PPP / RFC 1483 / RFC 1490) A Netwo rk Servic e defines the dat a encapsul atio n and pr otocol characteristi cs for the connec tion between two p acket switchin g devices.
Configu ring Netw ork Serv ice Info rmatio n (PPP / R FC 1483 / RFC 149 0 ) 3- 5 4 Sele ct the networ k servi ce to be eit her RFC 148 3, or PPP . If PPP , enter the Au thenticatio n Name and Aut henticatio n Password provided to you. Y ou can chang e the hea der co mpressio n from the defau lt of none to TCP /IP if you w ish.
3-6 C HAPTER 3: R EMOTE S ITE M ANAGEMENT 6 Check the En able Remo te Si te bo x. Config urin g A TM Inform ation The A TM paramete rs ar e suppl ied by your service pr ovider .
Configuri ng ATM Informat ion 3-7 ■ If PVC is sele cted, enter the VPI and VCI . ■ VPI — T he V irtual Path Identifi er (VPI) is part o f the ce ll head er for the cells tha t are transferred over this co nnection .
3-8 C HAPTER 3: R EMOTE S ITE M ANAGEMENT maximum aver age rat e or cells t hat ar e sent in bursts at a peak rate. ■ BT — The Burs t T o lerance ( also r eferr ed to as Maximum Burst S ize), in cells/seco nd. Thi s is the maximu m number of cell s that can be sent a t the p eak rate.
4 C ONFIGU RING IP R OUTING Int r oduction Th is ch apter con tains inform atio n on config uri ng r outi ng for IP pro toco l using the Of ficeConnect Remo te 840 .
4-2 C HAPTER 4: C ON FI GUR ING IP R OUTING T o con f igur e IP ro uti ng, IP must be defi ned on bo th the L AN inte rfac e and one or more r emote sites. On the LAN, an IP n etwork must exi st and it must have a specified IP address an d subnet mask.
Configurin g IP f or the LAN 4-3 For r outi ng to t ake place across the Of ficeConnect Remot e 840, you also have to se t up a co rresponding netwo rk over the W AN port (se e “Confi guring IP for the Remo te Site Conne ction” ). Use the Co nfig ura tion > Local Si te (LAN) > IP scr een to define or modify all IP netwo rks over t he LAN.
4-4 C HAPTER 4: C ON FI GUR ING IP R OUTING Resetting P arameters If you n eed to retur n to th e origin al para meters for this screen, click Reset be fore you click Ad d .
Configuri ng IP RIP on th e LAN 4-5 Conf igurin g IP RIP on the LAN RIP is utili zed as a means of communicat ing r outing info rmation betwe en r outer s. This is done to kee p the router s update d on inf ormati on. Local Site (LAN) RIP The RIP options f or the LAN can be acce ssed throu gh Configu ration > Local Site > IP .
4-6 C HAPTER 4: C ON FI GUR ING IP R OUTING This b rings up a screen c ontai ning the fo llowi ng f ields: 1 Y ou may ente r the follo wing fi elds: ■ Br oadca st Add ress - Ch eck one of two opti ons: Al l Ones or A ll Zer oes. ■ Max Re assembly - Enter the ma ximum val ue that your n etwork cannot exceed for this f unction .
Configur ing IP fo r the Remo te Site C onnectio n 4-7 Conf igurin g IP for the Rem ote Si te Connec tion T o s et up connec tions over the W AN, a remo te sit e pr ofile must be created and edited for each remote location you want to connect to.
4-8 C HAPTER 4: C ON FI GUR ING IP R OUTING Configu re the Remote S ite IP Network Inform ation The f ollowing st eps il lustra te how you conf igur e the r emote site IP network i nformatio n.
Configur ing IP fo r the Remo te Site C onnectio n 4-9 Remote WAN IP Address: ■ If you wer e provided a rem ote IP addr ess and netmask, select Speci fied and type in that addr ess and netmask. ■ If th e Of ficeConnect Remote 8 4 0 is learning the r emote IP addr ess from the remote site ( PPP only ), sele ct Lear n from Remote .
4-10 C HAPTER 4: C ONF IGUR ING IP R OUTING Conf igurin g IP RIP on a R emo te Site Access the RIP options for the W AN thro ugh Config uratio n > Remote Sites > IP . 1 Sele ct a define d r emote si te conn ection f r om the lis t and clic k Modif y .
Configuri ng IP Static a nd Fra med Rou tes 4-11 Conf igurin g IP Static and Framed Routes A Static r oute is a confi gur ed r oute that will r emain in the r outing table until deleted . Stati c r outes di ffer fr om Dynamic r outes in th at Dynami c r outes ar e l earned r eal-time vi a RIP .
4-12 C HAPTER 4: C ONF IGUR ING IP R OUTING 4 Click Manage in the Fram ed Routes box . 5 Click Add to d efine the foll owing pa rameters: ■ Gateway (addr ess) — The addr ess of t he neighb or r outer . ■ IP Route ■ Mask — The IP address for the mask .
Using I P Address Val i dation 4-13 Check or unch eck the IP Source V alida tion bu tton to respectively enable or disabl e the IP sour ce validati on. MAC- Enca psu lated Routi ng MAC-Enca psulated Rout ing co mbines r outing and bridgi ng so that routing fea tures (i.
4-14 C HAPTER 4: C ONF IGUR ING IP R OUTING Monito ring The Off iceConn ect Rem ote 840's IP Rout ing T able is displa yed by accessi ng the following pag e: Mon itor > Route s and Ser vic es > IP Routes . Globa l IP c ounte rs can be di spla yed thr ough Monitor > Netw orks > IP > IP Coun ters .
IP Test ing (PING) 4-15 A Ping Response s cr een will appear , with the r espon se fr om the ping. The following r esponses may occur . Ping R espons es ■ <IP Address> is a live The PING was successful. If a n ame was ent er ed i n the Pi ng pag e inpu t fiel d, the corr esponding IP addr ess is disp layed on the Respo nse page.
4-16 C HAPTER 4: C ONF IGUR ING IP R OUTING The name could no t be r eso lved. Either no DNS serv er was lo cated or the server(s ) did not ha ve the n ame in the ho st table l ist. Howeve r , this err o r will also appear i f the user enter ed an IP addr ess incorr ectly - such as 100.
IP Test ing (PING) 4-17 C:_ It is not u nusual fo r the first few atte mpts to ti me out. I f you don't receive a response the first ti me, try PIN Ging th e router aga in. If yo u still don't r eceive a res ponse, the most li kely cau se is incor r ect routi ng entri es.
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5 C ONFIGU RING B RIDGING Int r oduction Th is ch apter con tains inform ation on config uring br idgi ng for t he OfficeConnect Rem ote 840 . If you need more informati on on th e dif ference between Bridgi ng and Ro uting, and which one is best for your needs, see Appe ndix A, “Bri dgi ng an d Ro utin g” .
5-2 C HAPTER 5: C ON FI GUR ING B RIDGING T o efficiently separate traffic, the brid ge main tains a Brid ge Forwar ding Ta b l e . The table cont ains a list of MA C addr esses and their associated networ k segment s. The tabl e is built dynamica lly fro m the sour ce MAC addr esses of data packets pa ssing thr ough the bri dge.
Configuri ng Brid ging f or the LA N 5- 3 Conf igurin g Brid ging f or th e LAN T o confi gure a protocol o ver the L AN, you ne ed to assi gn a p rotocol networ k to the LA N port by pr ovid ing a name . Afte r addi ng a netw ork, you can modify a dvanced paramet ers.
5-4 C HAPTER 5: C ON FI GUR ING B RIDGING Modif ying or Deletin g a Brid ge Network T o modify i nforma tion p ertaining to an existi ng Bri dge netw ork, or to dele te that inform ation fro m your con figur atio n, foll ow these steps: 1 Pr oceed to t he Bridge scre en, foll owing steps 1 and 2 ab ove.
Bridging IP Traffic 5-5 For any r outi ng to take p lace acr oss the OfficeC onnect Rem ote 840, yo u also have t o set up a corr esponding networ k over the LAN. See “Conf igur ing Bri dging for the LAN” . Enabli ng Bri dging These instructio ns assume you hav e alr eady add ed a re mote site pr ofile.
5-6 C HAPTER 5: C ON FI GUR ING B RIDGING IP Forwardi ng refers to the routing o f IP packe ts from o ne inter face to another . It does not affect communicatin g to the OfficeCon nect Remote 840 itse lf.
Bridg e Firewal l 5- 7 the r outed pr otoc ols confi gured by th e pr ofile (i.e. , IP and/o r IPX) wi ll be sent using the a ppropria te br idge d en capsu lati on. If the c onfig ured Network Service is P PP , the p ackets will b e enc apsulated in BRCP .
5-8 C HAPTER 5: C ON FI GUR ING B RIDGING IPX r outing is enabl ed if an IPX network is pr esent over the Ethe r net interface (see “C onfigu ring I PX for the LAN” in Chap ter 9). Brid ging is enabled by adding a bridge net work o ver the Et hernet in terfa ce (s ee “Conf igur ing Bri dging for the LAN” ).
Advance d Bridging Options 5-9 In gener al, a pa cket r eceived in a r outed encapsul ation (i .e., I PCP or r oute d RFC 1483 or RFC 1490) is delive r ed to th e router .
5-10 C HAPTER 5: C ONF IGUR ING B RIDGING If you need to retur n to the orig inal paramete rs for this screen, click Reset before you click Su bmit. 3 Click Subm it wh en the field s have been entered to save yo ur customi zatio ns.
Monitori ng Bridgin g 5-11 Y ou will need to te ll your service provide r to use a conn ection on VPI / VCI using RFC 1483 or RFC 1490 (bri dged). Boot opti ons o nly a ff ect t he o perati on of a u nit whi ch do es not pr esently have an y con figu ration s etting s (i.
5-12 C HAPTER 5: C ONF IGUR ING B RIDGING If you h ave proble ms wit h brid gin g IP , check that IP F orwarding is dis abl ed on t he Config uration > Gl obal > IP > IP Setti ngs screen. Also, b e sure that your LAN IP Addresses belong to the sam e IP network as the remote site.
6 N ETWORK A DDR ESS T RANSLATION U SING THE O FF I C E C ONNECT R EMOTE 840 Int r oduction Th is ch apter con tains inform ation on addr ess transla tion us ing the Of ficeConnect Remote 8 40.
6-2 C HAPTER 6: N ETWORK A DDR ESS T RANSLATION U SING THE O FFICE C ONNECT R EMOTE 840 4 Under Address T ranslation, sel ect Port Address T ransl ation (P A T) , Netw ork Addr ess T ranslat ion (N A T) , or None (if you ar e not using addr ess translation).
Conf iguri ng Sta tic PA T Port Entrie s 6-3 Pr ess the Modify button to set th e address. Conf igurin g Static P A T Port En tries Pr ess the Static T rans mission Control Protocol (TCP) or Static Us er Data Prot oc ol (UDP ) bu tton t o access th e static port t ables.
6-4 C HAPTER 6: N ETWORK A DDR ESS T RANSLATION U SING THE O FFICE C ONNECT R EMOTE 840 After Stati c Port E ntries have b een conf igured, return to the IP Adv anced Modify screen and p re ss the Modify button for the chan ges to take ef fect.
Monitorin g 6-5 Monito ring If P A T is used, the active port mappi ngs a r e sh own in th e Monitor > Networks > NA T/P A T > Port Assignments screen. Only those mappings for the specifie d Rem ote Site will b e displa yed. Th is screen shows the active port mappings for both T CP and UDP conn ections.
6-6 C HAPTER 6: N ETWORK A DDR ESS T RANSLATION U SING THE O FFICE C ONNECT R EMOTE 840 840ug.book Page 6 Friday, July 7, 2000 2:23 PM.
7 C ONFIGU RING DHCP Int r oduction This chapter p rovides info rmation on co nfiguring the DH CP op tions for the O f ficeConnect Remo te 8 40. ■ “DHC P Ov ervi ew ” ■ “Confi guring the DH .
7-2 C HAPTER 7: C ON FI GUR ING DHCP The Of ficeConnect Rem ote 840 can be confi gured to sup port up to 40 works tatio ns on the l ocal LAN. In addi tion , the Of ficeConne ct Remote 840 c an be co nfigured to be a DHCP Relay .
Configurin g the DHCP Server 7-3 Conf igurin g the DHCP Ser ver The DHCP Server config urati on scr een contai ns the follo wing f ields: The Of ficeConnect Remote 8 40's local LAN IP addr ess shoul d be entered in as the IP Default Router and also as the DN S Server if the DNS Proxy functionalit y is enabled.
7-4 C HAPTER 7: C ON FI GUR ING DHCP Conf igurin g the DHCP Relay If you sele cted Re lay on the ma in DHC P screen, pr ess the Configur e DHCP Rela y button.
DHCP Sm art Mode Overvi ew 7-5 IP LAN address: 192.168.200.254 DHCP IP address start: 192.168.200.1 IP address end: 192.168.200.40 IP Mask: 255.255.255.0 IP Default Router: 192.168.200.254 Default Lease: 4800 WINS Servers: 0.0.0.0 0.0.0.0 DNS Servers: 192.
7-6 C HAPTER 7: C ON FI GUR ING DHCP 840ug.book Page 6 Friday, July 7, 2000 2:23 PM.
8 C ONFIGU RING DNS Int r oduction This chapter provides info rmation on confi guring th e DNS optio ns for the Of ficeConnect Remote 840. ■ “DNS Overview” ■ “Confi gurin g DNS ” ■ “Co.
8-2 C HAPTER 8: C ON FI GUR ING DNS Config urin g DNS T o acce ss the DN S configu ratio n scr eens, go to the Of ficeCon nect Remote 84 0 Manage r and select Config uratio n > Glob al > DNS . This scr een contains the foll o wing fields: 1 T o ena ble DNS services, check the Enable DNS box.
Configurin g Remote DNS Servers 8-3 Multi ple DNS r emote server entr ies can be added. The server is chosen based on the r eque sted dom ain name. If a match is not foun d, the default entry is ch osen. Th e defau lt entry h as a do main name o f '*'.
8-4 C HAPTER 8: C ON FI GUR ING DNS Conf igurin g Static DNS Host Entries The Of ficeConnect Rem ote 840 c an funct ion as a DN S server . 1 If you wan t to confi gur e any Stati c DNS Ent ries , select Static DNS Ent ries and click Add .
9 C ONFIGU RING IPX R OU TING Int r oduction Th is ch apter pr ovides an overvi ew on conf iguri ng IPX r outing for t he Of ficeConnect Remote 840. ■ “Ove rview ” ■ “Confi guring IPX fo r t.
9-2 C HAPTER 9: C ON FI GUR ING IPX R OUTING Conf igurin g IPX fo r the LAN T o con figur e IPX over the LAN, assign an IPX network t o the LAN port by pr ovid ing a name and a netwo rk addr ess. After add ing a netw ork you can modif y advance d parame ters.
Configur ing IPX f or Remote Sites Conn ection 9-3 Modif ying or Deleting an I PX Network T o modify i nforma tion p ertaini ng to an existi ng IP X netwo rk or to delet e that inform ation from your config uration, fo llow these steps: 1 Pr oceed to the IPX scr een, fo llowing st eps fr om the previou s section.
9-4 C HAPTER 9: C ON FI GUR ING IPX R OUTING If you n eed to conn ect to m ultiple remote sites (i.e ., two remote o ffices) you can set up a r emote s ite profile for each remote location . For any r outi ng to take p lace acr oss the OfficeC onnect Rem ote 840, yo u also ha ve to set up a cor r espondi ng net work ov er the LAN.
Config uring IPX Static and Fra med Rou tes 9-5 5 Check th e corr ect box in the IPX W AN Netw ork Addr ess box. ■ Select Unnumbered to u se the I PX address th at is assi gned to the Ether net port, OR ■ If the remote site's netwo rk adminis trator provided you with a W A N IPX addr ess, select Numbered Address .
9-6 C HAPTER 9: C ON FI GUR ING IPX R OUTING 3 Define the Rou te by enteri ng the follow ing fields: ■ Network Address — The ad dr ess of t he network. ■ Gateway Network — The addr ess of the rout er that jo ins the networ ks. ■ Gateway Node Address — Th e hardware ad dress of the gatewa y node .
Config uring IPX Static and Framed Se rvices 9-7 ■ IPX Netw ork (addr ess) — The IPX ad dr ess of the netwo rk. ■ Metric — The numbe r of r outers (1-15) t hr ough whi ch dat a packets trave l befor e rea ching thei r desti nation. ■ Ticks — A tick repr esents h ow far awa y the de stination i s for a d ata packe t (in secon ds).
9-8 C HAPTER 9: C ON FI GUR ING IPX R OUTING Addin g a Stat ic IPX Servi ce to a Local Si te (LA N) T o add a static IP X Service to a LA N: 1 Select Configura tion > Glob al > IP X > I PX Serv ices . 2 Click Add to d efine th e foll owing pa rameters of a static se rvice: ■ Serv er Na me — The name of the r emote serv er .
Config uring IPX Static and Framed Se rvices 9-9 Adding a Fr amed I PX Service to a Remote Site (W AN) T o add, m odify , or de lete a framed se rvice for a remote site: 1 Select Configura tion > Re mote Sites (W A N) . 2 Select the remote site to modi fy , a nd click Mo dify .
9-10 C HAPTER 9: C ONF IGUR ING IPX R OUTING Conf igurin g IPX RI P and SAP RIP is utili zed as a means of communicat ing r outing info rmat ion be tween r outer s.
Confi guring IP X RIP and SA P 9-11 Remote Site (W A N) RIP an d SAP IPX RIP an d SAP parame ters can be config ur ed on the re mote site IPX Modif y sc r een. Access thi s scr een by going to th e Of ficeC onnect Rem ote 840 home page . 1 Select Configura tion > Re mote Sites (W A N) , and click Modi fy .
9-12 C HAPTER 9: C ONF IGUR ING IPX R OUTING IP X Routi ng Confi gurat ion to Suppor t MAC-E ncapsu lated Routi ng Media Access Con tr ol (MAC)- Encapsulat ed Rout ing co mbines r outing and bri dging so that r outing featur es (i.e., A ddr ess T rans latio n, DNS Pr oxy , DHCP Serv er , etc.
IPX Test ing 9-13 For more infor mation o n these monitori ng screens, see “Monitori ng the Of ficeConnect Remote 840” in Chap ter 11 . 840ug.book Page 13 Friday, July 7, 2000 2:23 PM.
9-14 C HAPTER 9: C ONF IGUR ING IPX R OUTING 840ug.book Page 14 Friday, July 7, 2000 2:23 PM.
10 U PGRADING O PERATIONAL S OFTWAR E FOR THE O FF I C E C ONNECT R EMOTE 840 Int r oduction Th is ch apter deta ils the updatin g of the O ff iceConn ect Rem ote 840 softwar e.
10-2 C HAPTER 10 : U PGRADING O PERATIONAL S OFTWARE FOR THE O FFICE C ONNECT R EM OTE 840 Off ice Connect Remot e 840 CD If you hav e obtai ned an up dated Of ficeCo nnect Remote 840 C D, or if you h.
Installin g Operatio nal Software to the OfficeConn ect Remote 84 0 Unit 10-3 browser with the pathnam e of the new NAC file. The br owser will the n load thi s file i nto the unit's FLASH me mory . Final ly , you will reboot the unit to allow the new op erational softw are to become active.
10-4 C HAPTER 10 : U PGRADING O PERATIONAL S OFTWARE FOR THE O FFICE C ONNECT R EM OTE 840 5 Change to t he dir ectory containi ng the new oper ation al soft war e. If you obtaine d the software fr om the Installat ion CD or using Instant Upda te the defa ult directory is c:Program Fi les3Comocr840 .
11 M ONITORING THE O FF I C E C ONNECT R EMOTE 840 Int r oduction This chapter de scribes the details fo r perfo rming the system mo nitorin g on the O ff iceConn ect Remote 840.
11-2 C HAPTER 11 : M ONITORING THE O FFI CE C ONNECT R EMOTE 840 The throughp ut is dis played as line graphs that m ove from left to ri ght across the screen. The color -coded list of remote si te name s to the right of the graphs co rr espond to the col ored lin es on the gr aph.
Ethernet In terface 11-3 Figure 11–1 Throughput Graphs Ether net Inter face Interface Stat us The In terface St atus scr een provi des r eal-time i n formati on about the interfaces. T o bring up this screen, from the O fficeConnect R emote 840 Mana ger hom e page , select Monitor > Interface Status .
11-4 C HAPTER 11 : M ONITORING THE O FFI CE C ONNECT R EMOTE 840 Ethernet Co unter s The Ethernet counters sc re en shows r eal-time coun ters based on data packets that cr oss the Ethernet interface. Access this scr een from t he Of ficeConnect Remote 840 Mana ger home page by select ing Monitor > Ethe rn et .
11-5 Interface S tatus AT M S t a t u s The Int erface Status scr een pr ovides real- time informat ion abou t the interfaces. T o bring up this screen, from the O fficeConnect R emote 840 Manager home pa ge, sel ect Monitor > Interface Sta tus .
11-6 C HAPTER 11 : M ONITORING THE O FFI CE C ONNECT R EMOTE 840 The inf ormati on incl udes Cel l Deline atio n status, Data an d Idle Cel l counte rs, and er ro r detectio n, all of which ar e used to determin e t he healt h of your A TM link.
Remote Site Connec tion 11-7 Remote Site Connec tion Connec tio n T raffic/Err or Counters Y ou can view remote site con nection t raffic and error counters. From the Of ficeConnect Remote 8 40 Manage r home pa ge select Monitor > Remote S ites > Rem ote Site Co unters .
11-8 C HAPTER 11 : M ONITORING THE O FFI CE C ONNECT R EMOTE 840 Frame R elay VC Sit e Count ers Remote S ite Status Ta b l e T o view a comple te list of conf igur ed r emot e sit e pr ofiles and the ir s tatus, access the Rem ote Site Status scr een by selecting Monitor > R emote Sites > Remote Site Status .
IP 11-9 and the ne twork addr ess assigned to the con nection . IP and IPX W AN networ k nam es inco rpora te th e name of t he r emote sit e pr ofile. Below is an exampl e of a networ k status t able. IP Routi ng T able: The IP r outing tabl e contains t he list of al l IP r outes known by the OfficeConnect Rem ote 840 .
11-10 C HAPTER 11 : M ONITORING THE O FFI CE C ONNECT R EMOTE 840 IP , TCP , UDP , ICMP Counte rs and T able s The Of ficeConnect Rem ote 840 Manager pr ovides vari ous coun ters and tables for the IP , TCP , UDP an d ICMP p rotocols.
Address Transl ation 11-11 Each lease t able entry lists the IP addr ess and lea se durati on assigned t o each c lient hardware (MAC) add ress. DHC P Count ers Y ou can obtain detailed st atistics and error counte rs for the DHC P protocol.
11-12 C HAPTER 11 : M ONITORING THE O FFI CE C ONNECT R EMOTE 840 location . The mapped addr esses table keeps track of private- to-pu blic addr ess mappings. Ta b l e of Por t Ass ignme nts The Of ficeConnect Remote 8 40 ad dr ess trans lation pr ocess also cr eates a dynamic po rt assignm ent table when NA T or P A T is used.
IPX 11-13 IPX IPX Network s IPX networks ar e created when you con figur e IPX over the LAN and when a r emote site con necti on is est ablish ed that is config ur ed to route IPX traffic. T o view the li st of IPX networ ks and their st atus, br ing up the Netw ork Sta tus scr een.
11-14 C HAPTER 11 : M ONITORING THE O FFI CE C ONNECT R EMOTE 840 confi gur ed stat ical ly . The pr otocol typ e of R IP ind icate s r outes t hat wer e learned fr om IPX RIP info rmatio n exchang e with oth er r outers. IPX Ser vices The IPX servi ces tabl e contain s the list of al l IPX servers known to the OfficeConnect Remo te 840.
Even ts Logs 11-15 The scr een captur e below pr ovides an example of the network stat us table. Forwa r ding T able The bridge forwar ding tabl e is used for forw ar ding packe ts an d con tains the li st of learned medi a access contr ol (MAC) addr esses.
11-16 C HAPTER 11 : M ONITORING THE O FFI CE C ONNECT R EMOTE 840 Connec tion E vent L og The connec tion event log cont ains a text descript ion of W AN interface events. This incl udes cel l delineat ion detection as well as the pr ogre ss of remote site conne ctions.
12 C ONFIGU RING F ILTERS Int r oduction Th e Of ficeC onnect Rem ote 840 pr ovides an ext ensive s et of data f ilter ing capabiliti es. For i nstance, fil ters can accept packets only fr om spe cific addr esses to pr ovide added secur ity , or filt ers can be added to r educe network tr affic and im prove overall perform ance.
12-2 C HAPTER 12 : C ONFIGURING F ILTERS Filtering Capab ilitie s The Of fi ceConnect Rem ote 840 provi d es an ext ensive s et of data f ilter ing capabil iti es. The Of ficeConnect Re mote 84 0 suppor ts the fo llowi ng filter ing cap abili ties: ■ Input and out put data filteri ng.
Filterin g Capabil i ties 12-3 T able 12–1 Data Filters Advertise ment Filters Advertis ement fi lters op erate on network pr otocol packets tha t contai n vary ing in format ion such as SAP or RI P . Filtering of these pack ets is perform ed b y the speci fic protoc ol process.
12-4 C HAPTER 12 : C ONFIGURING F ILTERS Creati ng generi c filte rs can be a comple x task. Onl y experien ced user s shoul d employ generic f ilter s, and st rictly in cases wher e data and advertising fi lters canno t provide th e filterin g capabil ities that you re quire.
Creating F ilters U sing the Office Connect R emote 84 0 Manage r 12-5 The first is the dir ection/lo cation of t he packet. Ther e ar e four static dir ection/l ocations on which fi lters can be activated : incoming LAN traf fic, outgoi ng LAN traf fic, incomin g W A N tra ff ic and o utgoing W AN traf fic.
12-6 C HAPTER 12 : C ONFIGURING F ILTERS Example: T o prev ent seven ind ividual PCs on the LAN fr om accessi ng a remote site, create the follow ing two filte rs: Filter fo r Packets: Going to Remote Site V ienna Filter Name: Block PCs 1 -6 Protocol: IP Enabled: Y es Discard Packet i f IP Source A ddress is Equa l to 192.
Creating F ilters U sing the Office Connect R emote 84 0 Manage r 12-7 to. Thi s allows you to go bey ond th e bounds of t he “canne d” condi tion sentences. An over view and descr ipti on of each f ilter scr een is pr ovided bel ow: Y ou can get out of any scree n by usin g the HTML si de bar links.
12-8 C HAPTER 12 : C ONFIGURING F ILTERS ■ Enable or disable t he filter . (Y ou may want to cr eate a disabled filter , then enable it when you ar e satisfie d that th e filter condit ions ar e complet e.) ■ Select the pr otoco l for the fil ter bei ng added.
Creating F ilters U sing the Office Connect R emote 84 0 Manage r 12-9 Basi c IPX Condit ion has t he fo llow ing co ndi tion senten ces to se lect from: T able 12–5 Basic IPX Condition Advanced IPX.
12-10 C HAPTER 12 : C ONFIGURING F ILTERS *who se len gt h is 2x Len gth f iel d: two mask numb ers for ea ch byt e) ** who se leng th is not gr eater than 2x Le ngth fie ld. ■ Condi tion Su mma ry This scr een shows the filt er cond itions that hav e been cr eated so far .
Creating F ilters U sing the Office Connect R emote 84 0 Manage r 12-11 ■ Use the Ca ncel b utton to can cel a ny cha nges s ince t he l ast time you saved. When you hav e a filte r that cont ains “And”e d and “Or”e d conditi ons together , the su mmar y may d isplay extra blank l ines betw een conditi ons.
12-12 C HAPTER 12 : C ONFIGURING F ILTERS Step-by-Step Guide to Creating Filters Using the Of ficeConn ect Remote 840 Mana ger Filters can b e tricky to define so spend ti me before accessing the screens thinking abou t what yo u want the fil ter to d o.
Step-by-Step Gu ide to Crea ting Filters U sing the OfficeConnect R emote 840 M anager 12-13 As befor e, select th e conditi on sent ence, ch oose the keywor d and operati on and ente r the filt er value then pr ess “Next” to see t he Conditi on Summary scr een again.
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13 T R OUBLESHOOTING Int r oduction Th is ch apter con tains inform ation on the tr oubleshoo ting to ols and the tr oubleshoot ing ar eas for your Of ficeConnect Re mote 84 0.
13-2 C HAPTER 13 : T ROUBLESHOOTING ■ CLI T races — T raci ng can be turned on for var ious Of ficeConnec t Remote 840 soft ware compone nts using th e CLI set facil ity command. This feat ur e is for advanc ed tr oubleshooti ng and should onl y be used after all othe r methods fo r isolatin g the problem have be en tried.
LAN Conn ectio n Proble ms 13-3 LAN Connect ion Pr oblems IP Wi zard and Web Browser Problems Sympt om Possible Cause s Correc tive Acti on The LAN LED is Off . The OfficeConn ect Remote 84 0 Manage r Interface status indicate s Ethernet interface is down.
13-4 C HAPTER 13 : T ROUBLESHOOTING The work statio n does not ha ve a n IP address. If the w orkstatio n is supp osed to learn i ts ad dress fr om the OfficeConnect Rem ote 840, check that the unit is set up in DHCP Smart Mode . If not, set to DHCP Smart Mode and r eset.
IP Wizard a nd We b Brow ser Prob lems 13-5 The Web brows er do es not find t he OfficeConnect Remote 840 us in g its DNS name (DHCP Smart Mode in use). There is a prob lem with the LAN connection. See “LAN Connectio n Problem s”. The wor kstat ion is on a diffe rent IP subnet from the 840’s subnet.
13-6 C HAPTER 13 : T ROUBLESHOOTING W AN Conn ectio n Pr oblems Sympt om Possible Cause s Correc tive Acti on SDSL LED i s Off . OfficeConnect Remote 840 Man a ger Inter face Status indica tes that interfac e atm:1/hdl c:1 is down. WAN (modem ) cable is no t connec ted.
Gene ral Netwo rk C onnectio n Prob lems 13-7 General Network Connec tion Pr oblems Sympt om Possible Cause Correction Action Remote network is not respon ding (e.g . to PINGs or the Web brow ser conn ecti on requests.) LAN or WAN connec tion pr oblem .
13-8 C HAPTER 13 : T ROUBLESHOOTING If yo ur Net wor k Serv ice is PP P, the PP P Authentication informatio n may be incor rect. C heck connect ion event log (Mon it or > Eve nt s > Connecti on Even t Log) to see if the PP P connect ion cou ld not be establ ished due to a PAP or CHAP misma tch .
IP Netwo rk Conn ection Proble ms 13-9 IP Ne twor k Connec tion Pr oblems Accessing remote information is slower than expe cted . The S DSL se ttin gs indicate that a slo wer baud rate than expec ted wa s negotiated fo r the downstream traffic.
13-10 C HAPTER 13 : T ROUBLESHOOTING Symptom Possible Cau se Correctiv e Action Some r emot e sit es use the RIP p rotoco l to advertise your IP address t o other routers. I t may take more than 30 seconds for the IP route to the OfficeConnec t Remote 840 to be propagate d throughout the remote networ k.
IP Netwo rk Conn ection Proble ms 13-11 Symptom Possible Cau se Correctiv e Action My video appl icati on does not ru n wh en Port Add ress Tran slation (PAT) is enabl ed. Som e vide o app lica tions using UDP s treaming have two c onnect ions, a TCP conn ection for control and a UDP stream for data.
13-12 C HAPTER 13 : T ROUBLESHOOTING IPX N etw ork Connec tion Pr oblems Symptom Possible Cau se Corrective Action Remot e IPX netwo rk is not respondi ng (ex., ca n't find a Novell serv er). LAN or WAN connect ion pr oblem , or a ge neral co nfigu rati on problem.
Brid ge Co nne cti on Pro blem s 13-13 Bridge C onnec tion Pr oblems Sym ptom Possi ble Caus e C or rect ive Acti on Remote network is not respon ding. LAN or WAN conne ction proble m, or a gene ral co nfig urat ion probl em. See “LAN Connectio n Problem s” , “WAN Connec tion Pro blems” , and “Gene ral N etwo rk Conn ection Probl ems” .
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A B RIDGING AND R OUTING Int r oduction D uring t he ini tial con figur ation of the Of ficeConnect Remote 840 , you must deci de wheth er to confi gur e the unit as a bridge or as a r outer . If you ar e unsure whi ch option you sho uld choose, this section wi ll hel p you decid e.
A-2 A PPENDIX A: B RI DGING AND R OUTI NG Guidel ines fo r Choosi ng Br idgin g or Routi ng The lis t below out lines some of the r easons you migh t choose to confi gur e the Offi ceConnec t Remote 840 as a br idge or a r outer .
How Bri dges Learn A-3 addr ess table, the bridge kn ows the desti nation is on the LAN and therefore discar ds or filters the fram e. If the destination addr es s is not in the add re ss table, the bridge trans mits the data acr oss the bridge.
A-4 A PPENDIX A: B RI DGING AND R OUTI NG Figure A– 1 Simple Remote Bridging The Of ficeC onnect Rem ote 840 uses RFC 1483 or PPP en capsula tion to connect with othe r Of ficeConnect Remote 84 0 or thir d party devices .
How Bri dges Learn A-5 not be placed on LAN A. Ther efor e, frames passin g between LA N B and LANs C or D will not im pact the o verall performa nce of the LAN. Figure A– 2 Multiple Remote Bridge Multiple Pat hs Betwee n Bridge LANs W ith onl y a singl e physical path bet ween LANs, the ne twork is suscepti ble to link and brid ge failu re s.
A-6 A PPENDIX A: B RI DGING AND R OUTI NG other b ridge s det ect this a nd reconfig ure their port s so that there is onc e again an act ive da ta path thr ough the net work. Networ k T opolo gy If your netwo rk topolog y is star shaped, a co mbinati on of analo g modems an d bridgi ng is usuall y the most ef fici ent and su ccessfu l opti on.
Network O rganiz ation , Struc ture, and Physical Layo ut A-7 The Int ernet Th e pr otoc ol adopte d by the Def ense Dat a Networ k (DDN) f or the Internet, i s based on obtai ning a nd abid ing by , a r egi ster ed Internet addr ess range. This makes a r outer the ideal choice for acce ssing the Inter net.
A-8 A PPENDIX A: B RI DGING AND R OUTI NG ar e able to share the same Class B netwo rk addr ess, regar dless of their loca tion on t he bridge d network. Figure A– 4 Open Systems Interconnection Network Layer Model Open Syste ms Interconnec tion Network Layer M odel A r outin g envir onment allo ws stations to communi cate ind ir ectly .
IP Routin g A-9 Once the packet is received by th e Rout er A, atta ched to LAN 1, it strips of f the ne twork head er (r efer to Figur e above) and exami nes the Layer 3 heade r inform ation . It then r eviews its r outing tabl es in or der to esta blish where to forwar d the data pa cket.
A-10 A PPENDIX A: B RI DGING AND R OUTI NG The algor ithm wil l automati cally select to forwar d the data packet via Router A , as thi s rou te contains the leas t number of hop coun ts which makes it the pr eferr ed direct r oute.
B IP A DDR ESSING Intr oducti on to IP Addr essing This sect ion cont ains a br ief intr oduction t o the IP addr essing scheme for adminis trato rs that ar e new to the IP pr otocol.
B-2 A PPENDIX B: IP A DDRESSI NG be host 28 on s ubnet work 63 of tha t netwo rk. The netw ork it self would be call ed 128. 5.0.0 (Class B netwo rk number 5). Noti ce that by usi ng subne t mask s, you can de fine a natural hier ar chy in which the addr esses themsel ves indi cate how a pa cket is to be r outed.
IP Ad dre ssi ng Ba sics B-3 Clas s B n etwor k de scribe d above, a n add re ss of 128. 5.255. 255 is a br oadca st addr ess meanin g the pac ket is dest ine d for all nodes on the entir e Class B netwo rk.
B-4 A PPENDIX B: IP A DDRESSI NG can be, but does not have to be, the same as t he netma sk for any ot her supernet. As in su bnetting , a ne tmask creates a d ivision between the ne twork portion of an ad dress and the host p ortio n of an ad dress.
IP Ad dre ssi ng Ba sics B-5 with OfficeConnect R emote 84 0. The f irst option permits yo u to set th e subne t via n umeri cal (8-30 bits) desi gnatio n. F or ex ample : add ip network houston address 192.75. 202.99/23 Secondl y , you can sp ecify a class des ignati on: A, B, or C .
B-6 A PPENDIX B: IP A DDRESSI NG T o route IP , the two n etworks to be linked by the OfficeConnec t Remote 840 (lo cal LAN and t he ISP' s or r emot e site' s network ) must be on separ ate IP su bnets. For example , all lo cal LAN devi ces could be on subnet 192.
IP Ad dre ssi ng Ba sics B-7 2xx.xxx. 188.176 , and the subnet mask, 255.255.25 5.248, together to determi ne the num ber of a ddresses we had to work with .
B-8 A PPENDIX B: IP A DDRESSI NG exists when an IP addr ess identifies the i nterface as belongi ng to a speci fic IP ne twork or s ubnet (S ee Figure B- 1). Figure B–1 Numbered W AN Inte rfaces An unnumb er ed link exists when th e IP addr ess 0.0.
IP Ad dre ssi ng Ba sics B-9 Ether net in terface. Thi s IP address is the source IP address for r outer -generat ed pack ets goi ng out unn umber ed interfaces . The r outer's routing table s and d efault ga teway settin gs take care of getting the data traf fic to the corr ect r emote des tinat ions.
B-10 A PPENDIX B: I P A DDRESSING 840ug.book Page 10 Friday, July 7, 2000 2:23 PM.
C A DDR ESS T RANSLATION T UTORIAL Overview Public IP add re sses are reg ister ed and can be used within a pub lic network, such as the Inte r net. Du e to the limitati on of IP vers ion 4 addr ess space and the g ro wth of t he Internet, pub lic addr esses ar e becoming mor e scar ce.
C-2 A PPENDIX C: A DDRESS T RANSLATION T UTORIAL Network Address T ranslation (NA T) W ith NA T , a pool of pu blic addr esses is config ur ed and dynamicall y mapped t o a p rivate wo rkstatio n add re ss when accesses ar e made through the gateway to a public n etwork.
Netwo rk Addres s Transl ation ( NAT) C-3 pr ovid es a fir ewall and hides the pri vate local network fr om the outsid e world. Figure C–1 NA T Example Dynamic NA T When a lo cal PC se nds a packet .
C-4 A PPENDIX C: A DDRESS T RANSLATION T UTORIAL Static N A T Static N A T operates like Dynamic NA T except yo u may add entr ies to the addr ess translation tabl e and indicat e specific IP add r esses fr om the pool to map to specif ic private LA N IP addr esses.
Port Addr ess Translation (PAT) C-5 Doing t his pr ovides a fir ewall and hide s the pr ivate loca l network fr om the outside world. Figure C–2 P A T Example Dynamic P A T When a lo cal PC se nds a.
C-6 A PPENDIX C: A DDRESS T RANSLATION T UTORIAL world. Y ou would select t he port numbers bas ed on the t ype of acces s needed. For ex ample, if you had a local W EB serv er , you would s ele ct the IP addr ess of your ser ver and the port numb er 80, whic h is the UDP and TCP port numb er used to indica te HTML traffic.
D U SING THE CLI G UIDE Overview The pr eferr ed method of conf igurin g and manag ing the Of ficeConnect Remote 84 0 SDSL Ro uter is t he Web Br owser based Remote 840 Manager . It also comes with a sophisticated Command Line Interface (CLI). A command line inter face wil l r equi re you t o type in indi vidual co mmands on the s cr een.
D-2 A PPENDIX D: U SING TH E CLI G UIDE 840ug.book Page 2 Friday, July 7, 2000 2:23 PM.
E C ONFIGU RATIO N (N ON -S ETUP W IZAR D ) OF THE O FF I C E C ONNE CT R EMOTE 840 This chap ter descr ibes the detail s for perfo rming the in itial conf iguratio n of a O fficeCo nnect Remo te 840 whe n the unit has n ot b een c onf igured or has been restored to factory defaults.
E-2 A PPENDIX E: C ONFIGURATI ON (N ON -S ETUP W IZ AR D ) OF THE O FF ICE C ONNECT R EM OTE 840 If your uni t is usin g Frame Relay , this will ac cess the Remote Sit es Genera l Add scr een, contai ning the f ollow ing fiel ds: ■ Enter a name to ident ify the remote sit e.
Instructions for Internet Access E-3 If your uni t is using A TM, the Remo te Sites Gener al Add scr een will contai n the fol lowin g fiel ds: ■ Enter a name to ident ify the remote sit e. ■ Set Network Service to PPP over Frame Relay or RFC 148 3 .
E-4 A PPENDIX E: C ONFIGURATI ON (N ON -S ETUP W IZ AR D ) OF THE O FF ICE C ONNECT R EM OTE 840 Step 2: Configu ring the Remote Site A TM Par amet ers (A TM Only) The A TM Modify screen is to be filled in with in formati on from the Confi gurat ion Pl anning Forms in Chapt er 1 of th e I nst allati on Gu ide .
Instructions for Internet Access E-5 1 Conf igure the L oca l W AN IP Ad dress: ■ If the ISP pro vided yo u with a singl e IP addr ess, select Speci fied and enter that address. ■ If yo u ar e using PPP to dynamical ly a ssign a n add re ss, select Dy namic , and th e r emote sit e on th e W AN will assi gn a loca l W AN IP addr ess to you.
E-6 A PPENDIX E: C ONFIGURATI ON (N ON -S ETUP W IZ AR D ) OF THE O FF ICE C ONNECT R EM OTE 840 ■ If you want to run RI P , select fr om the pull -down menu to have the RIP set to Broadca st , Listen , or Br oadcas t & L iste n , and if one of th ese is ch osen , se t the RI P opti on t o RI PV1 or RI PV2.
Instructions for T elecommuting / Re mote Office Access E-7 4 Pr ess the Modify button before leaving this screen to sa ve the cha nges. 5 If yo u ar e also goi ng to configure the ro uter for T elecommut ing / R emote Office Access, continue to the n ext sectio n.
E-8 A PPENDIX E: C ONFIGURATI ON (N ON -S ETUP W IZ AR D ) OF THE O FF ICE C ONNECT R EM OTE 840 ■ Enter the DLCI . ■ Check the Enable Bridging and/or Enable MA C En cap sulat ed Routing boxes as needed.
Instructions for T elecommuting / Re mote Office Access E-9 Step 2: Configu ring the Remote Site A TM Parameters The A TM Mod ify screen shown be low is to be fil led in wi th info rmatio n from the Co nfigura tion P lanni ng T able y ou c omplete d in Ch apter 1 of the Inst alla tion Guid e.
E-10 A PPENDIX E: C ONFIGURATION (N ON -S ETUP W IZAR D ) OF THE O FF I CE C ONNECT R EMOTE 840 Step 3: Configu ring the Re mote Site IP Network Inform ation 1 If you are r outin g with IP , co mplete the en tries on this screen. Otherwise, pr ess Next .
Instructions for T elecommuting / Re mote Office Access E-11 ■ If the remote site admi nistrato r provided a remote IP a ddress and netmask, sele ct Speci fied and type in that addr ess and netmask. ■ If th e Of ficeConnect Remote 8 4 0 is learning the r emote IP addr ess from the remote site ( PPP only ), sele ct Lear n From Rem ote .
E-12 A PPENDIX E: C ONFIGURATION (N ON -S ETUP W IZAR D ) OF THE O FF I CE C ONNECT R EMOTE 840 Y ou cannot use an unnumbere d Local I P WA N Addr ess and have P A T enabled . 6 If you ar e rout ing IPX, pr ess the Next but ton to pr oceed to the I PX Modif y scr een.
Usin g th e Conf igur atio n Au dit E-13 5 5 Pr ess the Save Co nfiguratio n bu tton on the si debar to save the setti ngs you ju st ente r ed. Step 5: Co nfigu ring a Local IP X Network If you ar e setting up t he Of ficeConne ct Remote 840 to r oute IPX, fol low thes e st eps .
E-14 A PPENDIX E: C ONFIGURATION (N ON -S ETUP W IZAR D ) OF THE O FF I CE C ONNECT R EMOTE 840 Read t he e xplanati on of the a udit topics and categor ies to hel p you interpret the results of the au dit by se lecting th e audit topics a t the bottom of the p age.
F TECHNICAL SUPPOR T 3Com pr ovides easy acc ess to technical support inform ation thr ough a variet y of serv ices. This appe ndix descr ibes t hese ser vices . Informa t ion c ontaine d in this append ix is corr ect at time of publicat ion. For the very l atest, 3Co m recommends th at you access the 3Com Cor porat ion W orld Wide Web si te.
F-2 A PPENDIX F: TECHNICAL SUPPORT ■ A list of system hardwar e and software, including revi sion levels ■ Diagnostic error messages ■ Detai ls about r ecent config urati on chang es, if a pplic able If you ar e unable to contact your networ k suppl ier , see the foll owing section on how to co ntact 3Com.
Numbers 3Com URL F - 1 A adding a bridge network 5 - 3 a framed I P rou te to a r emote site 4 - 11 a local IP ne twork 4 - 3 a logi n 2 - 2 a r emote site pr ofile 3 - 2 a static I P route to the LAN.
concepts A -1 guidel ines A -2 IP traf fic 5 - 5 multiple path s between LANs A -5 brid gin g and rout ing broad cast st or ms A -6 Internet A -7 IP routi ng A -9 network topol ogy A -6 network, o rga.
Defa ult Bridg e Mo de 5 - 10 for r e mote site conn ections 5 - 4 for the LAN 5 - 3 intr oduction 5 - 1 MAC-Enca psulat ed Rou ting 5 - 6 monitori ng 5 - 11 testing 5 - 11 confi gur ing br id ging f .
A TM site 11 - 7 brid ge 1 1 - 1 5 connection traf fic/error 11 - 7 DHCP 11 - 11 Ethernet interface 11 - 4 Frame Re lay VC site 11 - 8 IP , TCP , UDP , ICMP 11 - 10 crea ting filters overvi ew 1 2 - 4.
enabl ing bridging for remote site conne ctions 5 - 5 IP routi ng 4 - 2 Ethernet interface counters 11 - 4 interface status 11 - 3 Ethernet performance 11 - 3 F factory de faults, res toring 2 - 3 fil.
IP counters 11 - 10 network c onnecti on pr obl ems 13 - 9 netwo rks 11 - 8 number ed and unn umber ed links B - 7 planni ng B - 5 ro ut i n g A - 9 subnet mask address B - 5 tables 11 - 10 testing (P.
RIP and SAP 9 - 10 M MAC-Enca psulat ed Rou ting 1 - 4, 4 - 13, 5 - 6 mana ging Office Connect Rem ote 840 1 - 14 remote s ite prof il e 3 - 2 mapped add ress tabl e 11 - 11 menus for the OfficeCo nne.
O Obtaining 10 - 1 obtai nin g upgr aded soft ware 10 - 1 Office Connect Rem ote 840 back pa nel 1 - 11 CD 10 - 2 cr eating filter s 12 - 12 defined 1 - 2 DIP s witc hes 1 - 12 filter scr eens 1 2 - 6.
range o f IP a ddr esses B - 6 rem ote site connection 11 - 7 defined 1 - 5 RIP and SAP 9 - 11 status ta ble 11 - 8 remote sit e mana gement adding a re mote site pr ofile 3 - 2 configu ring A TM info.
storms A -6 structure A -6 subn etti ng B - 1 and the Offi ceConne ct Remo te 840 B - 4 supe rn etti ng (a dvanc ed T CP/I P) B - 3 syslog m anagers 2 - 8 System Admin istration tasks 2 - 1 assigning .
tables 11 - 10 Unconfi gur ed Mo de, defin ed 1 - 9 updatin g softwar e 2 - 4 upgradi ng softwar e instal ling 10 - 2 obtai nin g 1 0 - 1 Of ficeConn ect Rem ote 840 CD 10 - 2 via DOS 10 - 3 via Of fi.
840ug.book Page 12 Friday, July 7, 2000 2:23 PM.
3Com Corporation L IM ITE D W ARRANTY This warranty applies to customers located in the United States, Australia, Canad a (except Quebec), Ireland, New Zeala nd, U.K., and ot her English l angua ge count ries, and c ountries for whi ch a translat ion into the loc al languag e is not pr ovided .
Dead- or De fective- on-Ar rival . In the ev ent a produ ct co mpletely fails t o functi on or exh ibits a defect in materia ls or wo rkma nship wi thin t he firs t for ty-eight (48) ho urs o f inst a.
FCC C LASS B S TATEMENT This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1 This device may n ot cause harmf ul interference, and 2 This device must accept any interference received, including interference that may cause undesired operation.
840ug.book Page 16 Friday, July 7, 2000 2:23 PM.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté 3Com 3C840 c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du 3Com 3C840 - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation 3Com 3C840, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le 3Com 3C840 va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le 3Com 3C840, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du 3Com 3C840.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le 3Com 3C840. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei 3Com 3C840 ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
