Manuel d'utilisation / d'entretien du produit SG Appliance du fabricant Blue Coat Systems
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Blue Coat ® Systems SG ™ Appliance V olume 9: Managing the Blue Coat SG Appliance SGOS V ersion 5.2.2.
Contact Inf ormation Blue Coat Systems Inc. 420 North Mary A ve Sunnyvale, CA 94 085-4121 http://www.bluecoat.com/support/contact.html bcs.info@bluecoat.com http://www .bluecoat.com For concerns or feedback about the documentation: documentation@bluecoat.
iii Contents Contact Information Chapter 1: About Managing the SG Applia nce Document Conventions ............ ................. ................. ................. ................. ................. .......... ....... ................. ... 7 Chapter 2: Monitoring the SG Appliance Using Director to Manage SG Systems .
V olume 9: Managing t he Blue Coat SG Appliance iv Restore-Defaults ................. ................. ................. ................. ................. ................. ......... ..... ................. .... 34 Factory-Defaults .............. .
Contents v Viewing Traffic History .................... ................. ................. ................. ................ ................. .............. ............. 65 Understanding Chart Data ...................... ................. ........
V olume 9: Managing t he Blue Coat SG Appliance vi.
7 Chapter 1: About Managing the SG Appliance V olume 9: Managing t he Blue Coat SG Appliance describes how to monitor the SG appliance with SNMP ( a brief intr oduction to Director is provided) , event logging, or health monitoring. It also describes co mmon maintenance and troubleshooting tasks.
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9 Chapter 2: Monitoring the SG Appliance This chapter describes the methods you ca n use to monitor your SG applianc es, including event logging, SNMP , and health moni toring.
V olume 9: Managing t he Blue Coat SG Appliance 10 Director Registration Requirement s T o register the appliance with Director , the SS H-Console service must be enabled. Dir ector regis tration will fail if the s sh-console has been disabled or de leted, or if the SSHv2 host key has been r emoved.
Chapter 2: Monitoring the SG Appliance 11 Setting up Director and SG Appliance Communication Director and the SG appliance use SSHv2 as the default communication mode.
V olume 9: Managing t he Blue Coat SG Appliance 12 T o delete a key: SGOS#(config sshd) delete director-c lient-key clientID Monitoring the System and Disks The System and disks page in the Management Console has the following tabs: ❐ Summary Provide s configuration informati on and a ge neral status information about the device.
Chapter 2: Monitoring the SG Appliance 13 V iewing System Environment Sensors The icons on the Envir onment tab are gr een when the r elated hardwar e environment is within acceptable parameters, and red when an out-of-tolerance condition exists.
V olume 9: Managing t he Blue Coat SG Appliance 14 V iewing Disk S tatus Y ou can view the status of each of the disks in the sy stem and take a disk of fline if needed. T o view disk st atus or t ake a disk offlin e: 1. Select Maintenance > System and disks > Envir onment .
Chapter 2: Monitoring the SG Appliance 15 V iewing SSL Accelerator Card Information Selecting the Maintenance > System and disks > SSL Cards tab allows you to view information about any SSL accelerator cards in the system. If no accelerator car ds are installed, that inform ation is stated on the pane.
V olume 9: Managing t he Blue Coat SG Appliance 16 Related CLI Commands f or Setting the Ev ent Logging Le vel SGOS#(config event-log) level { sever e | configuration | policy | informational | verbos.
Chapter 2: Monitoring the SG Appliance 17 T o enable event notifications: 1. Select Maintenance > Event Logging > Mail . 2. Click New to add a new e-mail ad dress; clic k OK in the Add list item dialog that appears.
V olume 9: Managing t he Blue Coat SG Appliance 18 T o enable syslog monitor ing: 1. Select Maintenance > Event Logging > Syslog . 2. In the Loghost f ield, enter the domain name or IP addr ess of your loghost server . 3. Select Enable Syslog . 4.
Chapter 2: Monitoring the SG Appliance 19 Syslog notification: disabled Syslog facility: daemon Event recipients: SMTP gateway: mail.heartbeat.bluecoat.com Viewing the Event Log Content s Again, you can view the event log contents from the show command or from the event-log configuration mode.
V olume 9: Managing t he Blue Coat SG Appliance 20 Example SGOS# show event-log start "2004-10- 22 9:00:00" end "2004-10-22 9:15:00" 2004-10-22 09:00:02+00:00UTC "Snaps hot sysinfo_stats has fetched / sysinfo-stats " 0 2D0006:96 .
Chapter 2: Monitoring the SG Appliance 21 Configuring SNMP Community S trings Use community strings to r estrict access to SNMP data. T o read SNMP data on the SG appliance, specify a read c ommunity string. T o write SNMP data to the appliance, specify a write community string.
V olume 9: Managing t he Blue Coat SG Appliance 22 SGOS#(config snmp) trap-community pa ssword T o set them as encrypted: SGOS#(config) snmp SGOS#(config snmp) enable SGOS#(config snmp) encrypted-read.
Chapter 2: Monitoring the SG Appliance 23 Configuring Health Monitoring The health monitoring featur e tracks key hard ware and softwar e metrics so that you can can quickly discover and diagnose potentia l problems.
V olume 9: Managing t he Blue Coat SG Appliance 24 About the Health Monitoring Metric T ypes The SG appliance monitors the fo llowing types of health metrics: ❐ Hardwar e ❐ Environmental ❐ ADN .
Chapter 2: Monitoring the SG Appliance 25 Health Monito ring Example The following picture shows an example. The lower horizontal line re presents the W arning threshold; the upper horizontal line is the Critical thr eshold. Note how they divide the graph into bands associated with ea ch of the thr ee possible states.
V olume 9: Managing t he Blue Coat SG Appliance 26 For the license expiration metric s, the threshold interval is irr elevant and is set by default to 0. Y ou should set the W arning Threshold to a value that will give you ample time to renew your license.
Chapter 2: Monitoring the SG Appliance 27 See “About License Expiration Metrics ” on page 25 for information licensing thresholds. About the S tatus Metrics The following table lists the metrics displaye d in the Maintenance > Health Monitoring > Status page.
V olume 9: Managing t he Blue Coat SG Appliance 28 Changing Threshold and Notification Properties The health monitoring thr eshold and notificati on properties ar e set by defau lt. Use the following procedur e to modify the current settings. T o change the threshold and notification proper ties: 1.
Chapter 2: Monitoring the SG Appliance 29 4. Click Edit to modify the thr eshold and notification setti ngs. The Edit Health Monitor Setting dialog dis plays. (hardwar e, environmental, and ADN thr esholds cannot be modified.) 5. Modify the thresho ld values: a.
V olume 9: Managing t he Blue Coat SG Appliance 30 System health is determined by calculating the “aggregate” health status of the following metrics: ❐ CPU Utilizati on ❐ Memory Pressur e ❐ .
Chapter 2: Monitoring the SG Appliance 31 4. Click Close to close the View Metrics Detail dialog. 5. Optional—If you want to modify a metric, highlight the metric and click Set Thresholds .
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33 Chapter 3: Maintaining the SG Appliance This chapter describes how to maintain the SG appliance; for example, r estarting the appliance, r estoring system defaults, upgrading the appl iance, and reinitia lizing disks.
V olume 9: Managing t he Blue Coat SG Appliance 34 2. In the Restart field, select either Software only or Hardware and software . 3. If you select the Har dware and software option, select a system from the System to run drop-down list. The default system is pre-selected.
Chapter 3: Maintaining the SG Applia nce 35 ❐ Third- party vendor licenses, such as SmartFilter or W ebsense. If you use the restore-defaults command after you have installed licenses, and the seria.
V olume 9: Managing t he Blue Coat SG Appliance 36 T o restore system default s: 1. Select Maintenance > System and disks > T asks . 2. From the Ta s k s field, click Restore the configuration to defaults . If you restore the configuration fr om the Management Consol e, most settings are lo st because you cannot use the keep-console option.
Chapter 3: Maintaining the SG Applia nce 37 T o clear the object cache: 1. Select Maintenance > System and disks > T asks . 2. In the T asks fi eld, click Clear next to “the object cache.” 3. Click OK to confirm in the Clear cache dialog that appear s.
V olume 9: Managing t he Blue Coat SG Appliance 38 The SG Appliance 5.x V ersion Upgrade The appliance must be running version SGOS 4.2.1.6 or later in or der to upgrade to SGOS 5.x. Y ou cannot directly upgrade fr om any pre vious version. T o upgrade the SG appliance : 1.
Chapter 3: Maintaining the SG Applia nce 39 3. (Optional) Select the system to replace in the Replace dr op-down list. If you uploaded an image from your PC, refr esh the Systems pane to see the new sys tem image. 4. Click Restar t . The Restar t system dialog displays.
V olume 9: Managing t he Blue Coat SG Appliance 40 T roubleshooting Tip If the SG appliance does not come up after rebootin g and the serial port is connected to a terminal server (terminal concentrator), tr y the following: ❐ Have an active session open on the termin al server , noting any traf fic (character s) being output.
Chapter 3: Maintaining the SG Applia nce 41 T o view details for an SGOS syst em version: At the command prompt: SGOS> show installed-systems Example Session SGOS> show installed-systems SG Appliance Systems 1.
V olume 9: Managing t he Blue Coat SG Appliance 42 Related CLI Syntax to Set the Default Boot System SGOS#(config) installed-systems SGOS#(config installed-systems) defa ult system_number Locking and Unlocking SG Appliance Systems Any system can be locked, except a system that has been selected for replacement.
Chapter 3: Maintaining the SG Applia nce 43 Deleting an SG Appliance System Y ou can delete any of the sys tem versions except the curr ent running system.
V olume 9: Managing t he Blue Coat SG Appliance 44 Single-Disk SG Appliance The disk on a single- disk SG appliance cannot be r einitialized by the customer . If you suspect a disk fault i n a single-disk SG applia nce, con tact Blue Coat T echnical Support for assistance.
45 Chapter 4: Diagnostics Blue Coat Systems has a number of re sources to pr ovide diagnostic information: ❐ Heartbeats: Enabled by default, Heartbeats ( s tatistics) are a diagno stic tool used by Blue Coat, allowing them to proactiv ely monitor the health of appl iances.
V olume 9: Managing t he Blue Coat SG Appliance 46 This chapter discusses the following topics: ❐ “Diagnostic Reporting (Service Information)” on page 46 (This incl udes taking snapshots of the sys tem.
Chapter 4: Diagnostics 47 3. Enter the service-request number that you r eceived from a T echnical Support repr esentative into the Auto Send Service Request Number field (the service-request number is in the form xx-xxxxxxx or x-xxxxxxx). 4. Click Apply to commit the changes to the SG appliance.
V olume 9: Managing t he Blue Coat SG Appliance 48 Configure Service In formation Settings The service information options al low you to se nd service informa tion to Blue Coat using either the Management Console or the CLI.
Chapter 4: Diagnostics 49 4. (Optional) If you select Access Logs , Snapshots , or Contexts , you must als o click Select access logs to send , Select snapshots to send , or Select contexts to send and complete the following steps in the corresponding dialog that appears: a.
V olume 9: Managing t he Blue Coat SG Appliance 50 Creating and Editing Snapshot Jobs The snapshot subsystem periodically pulls a specified console URL and stores it in a repository , offering valuable r esources for Blue Coat customer support in diagnosing problems.
Chapter 4: Diagnostics 51 4. Enter the following information into the Edit Snapshot fields: a. Ta r g e t : Enter the object to snapshot. b. Interval (min utes) : Enter the interval between snapshot reports. c. T otal Number T o T ake : Enter the total number of snapshots to take or select Infinite to take an infinite n umber of snapshots.
V olume 9: Managing t he Blue Coat SG Appliance 52 Packet Capturing (the Job Utility) Y ou can capture packets of Ethernet frames going into or leaving an SG appliance. Packet capturing allows f iltering on various attr ibutes of the frame to limit the amount of data collected.
Chapter 4: Diagnostics 53 Using Filter Expre ssions in the CLI T o add a filter to the CLI, use the command: SGOS# pcap filter expr parameters T o remove a filter , use the command: SGOS# pcap filter <enter> Configuring Packet Capturing Use the following pr ocedures to configur e packet capturing.
V olume 9: Managing t he Blue Coat SG Appliance 54 T o e nable, stop, and downlo ad packet captur es: 1. Select Maintenance > Serv ice Information > Packet Captures . 2. In the Direction drop-down list, sele ct the capture direction: in , out , or both .
Chapter 4: Diagnostics 55 6. Set the buffer size and method by ch oosing one of the following radio buttons: a. Capture all matching packets. b. Capture first n matching packets. Enter the numb er of matching pac kets (n) to capture. If the number of packets reac hes this limit, packet capturing stops automatically .
V olume 9: Managing t he Blue Coat SG Appliance 56 Related CLI Syntax to De fine P ack et Capturing Settings SGOS# pcap filter parameters SGOS# pcap start [ subcommands ] T o start, st op, and download packe t captures through a browser: 1. Start your W eb browser .
Chapter 4: Diagnostics 57 T o view current pac ket capture st atistics: 1. Select Maintenance > Serv ice Information > Packet Captures . 2. T o view the packet capture statistics, click the Show statistics button. A window opens displaying the statistics on the current pa cket capture settings.
V olume 9: Managing t he Blue Coat SG Appliance 58 Related CLI Syntax for Configur ing Core Image Restart Options SGOS#(config) restart core-image {co ntext | full | keep number | none} Diagnostic Rep.
Chapter 4: Diagnostics 59 Diagnostic Reporting (CPU Monitoring) Y ou can enable CPU monitoring whenever you want to see the perc entage of CPU being used by specific functional gr oups.
V olume 9: Managing t he Blue Coat SG Appliance 60 Note: The commands SGOS#( config) s how cpu and SGOS#(config diagn ostics) view cpu-monitor can sometimes display CPU statisti cs that dif fer by about 2-3%. This occurs because dif ferent measur ement techniques are used for the two displays .
61 Chapter 5: S tatistics The Statistics tabs of the Management Cons ole allow you to view the status of many system operations. Many statistics are avai lable thr ough the CLI, but only in text output. Y ou can also view detailed system information thr ough the CLI using the show command.
V olume 9: Managing t he Blue Coat SG Appliance 62 V iewing T raffic Distribution S tatistics Use the Statistics > T raffic Mix page to display traffic distribution and band width statistics for traf fic running through the SG appliance. Y o u can display statistics for pr oxy types, or for services, and for various time pe riods.
Chapter 5: St atistics 63 Understanding Chart Dat a The chart data updates au tomatically every 60 seconds. The units for the X and Y axis change accordi ng to the selected duration. For e xample, if you select "Last W eek,” the X-axis displays the days of the week (the most current day is to the far right).
V olume 9: Managing t he Blue Coat SG Appliance 64 About the Default Service S tatistics The default service statistics r epresent bytes fo r traffic that has been bypassed because it did not match: ❐ An existing service listener ❐ Other rules, such as static or dynamic bypass T o view the default service bytes, click Default P or ts.
Chapter 5: St atistics 65 5. Select the Prox y radio button to display the ba ndwidth usage statistics for all supported proxies. V iewing Client Byte and Serv er Byte T raffic Distribution Select the.
V olume 9: Managing t he Blue Coat SG Appliance 66 Supported Proxy T y pes and Services The T raffic Histor y (and T raffic Mix ) page displays da ta for the following proxy types (and services of these pr oxy types): a d b c e Key: a. V iew traf fic history statistics by service or by pr oxy .
Chapter 5: St atistics 67 Unsupported Proxy T ypes The T raffic Histor y does not display data for the following proxy types: Understanding Chart Dat a The T raffic Histor y chart data updates automatically ev ery 60 seconds.
V olume 9: Managing t he Blue Coat SG Appliance 68 About Bypassed Bytes Bypassed bytes are bytes that ar e not int erc epted by a service or proxy . By default, bypassed bytes are included in the traffic mix view s. When eval uating traffic statistics for potential optimization, it can be useful to in clude or ex clude the bypassed byte statistics.
Chapter 5: St atistics 69 ❐ CIFS History The Statistics > Protocol Details > CIFS History pa ges enable you vi ew statistics for CIFS objects, CIFS bytes read, CIFS bytes wr itten, and CIFS clients. Refer to the CIF S chapter in V olume 2: Proxies and Proxy Services for mor e information about these statistics.
V olume 9: Managing t he Blue Coat SG Appliance 70 ❐ Streaming History The Statistics > Protocol Details > Streaming History pag es enable you view statistics for W indows Media, Real Media, QuickT ime, current str eaming data, total streaming data, and bandwidth gain.
Chapter 5: St atistics 71 Viewing Concurrent Users The Concurrent Users tab shows users (IP addr esses) going thr ough the SG appliance for the last 60 minutes, day , week, month, and ye ar . Only uniqu e IP addresses of connections intercepted by pr oxy services are counted towar d the user limit.
V olume 9: Managing t he Blue Coat SG Appliance 72 Viewing Disk Use S tatistics The Disk Us e tab shows the SG appliance disk usage. The fields on the tab are : ❐ System Objects— the percentage of.
Chapter 5: St atistics 73 Viewing Dat a Allocation St atistics in RAM and on Disk The Data tab shows the total and available disk space and RAM, and how they ar e currently allocated. The fields on the Data ta b ar e described below . Y ou can also view this information in the CLI.
V olume 9: Managing t he Blue Coat SG Appliance 74 Contents S tatistics The Conten ts tabs ( Distribution and Data ) allow you to see information about objects currently stor ed or served organized by s i ze. The cache contents include all objects currently stor ed by the SG appliance.
Chapter 5: St atistics 75 Event Logging S tatistics The event log contains all events that have occurred on the SG appliance. Configur e the level of detail available by selecting Maintenance > Event Logg ing > Level (For details, see “Configuring Which Events to Log” on page 15).
V olume 9: Managing t he Blue Coat SG Appliance 76 Failover S tatistics At any time, you c an view statistics for any failover group you have configur ed on your system. T o view failover st atistics: 1. Select Statistics > System > F ailover . 2.
Chapter 5: St atistics 77 Analyzing Proxied Sessions Use the Statistics > Active Sessions > Pro xied Sessions page to get an immediate picture of the sessions, protocol types, services, byte s, and bandwidth gains (d erived from W AN optimization and object caching) associated with client traf fic.
V olume 9: Managing t he Blue Coat SG Appliance 78 T able 5-1. T able Column Hea ding Description s on the Proxied Sessions P age Column Heading Description Client IP address and port of the client PC (or other downstream host). When the client connection is inactive , the contents of this column are unavailable (gray).
Chapter 5: St atistics 79 Ser ver Bytes Represents the number of bytes (to and fr om the server) at the socket level on the s erver connection. All application-level bytes are counted, including applic ation overhead such as HTTP headers, CIFS headers, and so on.
V olume 9: Managing t he Blue Coat SG Appliance 80 OC Object Caching. When displ ayed in co lor , this icon indicates that an HTTP , HTTPS, CIFS, Stream ing, or FTP proxy is in use and the content is cach eable.
Chapter 5: St atistics 81 Using the T ool Tip s Hover the cursor over the following components to get more information: ❐ T able column headers—Disp lays the full name of the column header . ❐ Row values. ❐ Acceleration icons ( C , BC , OC , P , BM )—Displays the icon identity .
V olume 9: Managing t he Blue Coat SG Appliance 82 MMS The active sessi ons feature display s MMS stream s that have a client associated with them. MMS streams that do not have a client as sociated with them (multicast, content management requests, and so on) are not displayed.
Chapter 5: St atistics 83 About the Byte T otals The client and server byte total is the sum of all bytes going to and from the client or server . All applica tion-level bytes are counte d, includ ing application over head such as HTTP headers, CIFS headers, and so on.
V olume 9: Managing t he Blue Coat SG Appliance 84 Figure 5-12. Filter ing Proxied Sessions When you select a filter , a text field or popup displays so that you can ent er filtering criteria. If you select a filter , you must enter a filtering cr iteria (or select None ) befor e clicking Show .
Chapter 5: St atistics 85 The Bypassed Connections page displays data for connections that were not inter cepted because: ❐ A service has not been configured to inter cept the traffic. ❐ A static or dynamic bypass r ule ca used the traf fic to be bypassed.
V olume 9: Managing t he Blue Coat SG Appliance 86 Filtering the Display Use the Filter dr op-down list to filter the bypassed connection statistics. Figure 5-14. Filter Drop-Down List When you select a filter , a text field or drop-down displays so that you can enter filteri ng criteria.
Chapter 5: St atistics 87 V iewing HTML and XML Views of Bypassed Connections Dat a Access the following U RLs to get HTML and XML views of acti ve session statistics HTML: https:// SG IP :8082/AS/Byp.
V olume 9: Managing t he Blue Coat SG Appliance 88 2. Click the appropriate link for the ser vice you want to view . A list of categories fo r that service displays. 3. T o view the statistics for a particular category , click that category’s link. A window opens, detailing the relevant statistics.
Chapter 5: St atistics 89 resources Alloca tion of system resources snmp SNMP s tatistics streaming Stream ing information system-resource-metrics System Resource Metrics.
V olume 9: Managing t he Blue Coat SG Appliance 90.
91 Appendix A: Glossary A access control list Allows or denies sp ecific IP addresses access to a server . access log A list of all the requests sent to an a ppliance. Y ou can read an access log using any of the popular log-reporting pr ograms. When a client us es HTTP streaming, the streaming entry goes to the same access log.
V olume 9: Managing t he Blue Coat SG Appliance 92 authenticate-401 attribute All transpar ent and explicit r equests rece ived on the port always use transpar ent authentication (cookie or IP , depending on the configuration).
Appendix A: Glossary 93 cache efficiency A tab found on the Statistics pages of the Management Console that shows the percent of objects serv ed from cache, the per cent loaded from the network, and the percent that w ere non-cacheable.
V olume 9: Managing t he Blue Coat SG Appliance 94 destination objects Used in V isual Policy Manager . Thes e are the ob jects that define the tar get location of an entry type.
Appendix A: Glossary 95 explicit proxy A configuration in which the browse r is explicitly co nfigured to comm unicate with the proxy server for access to content. This is the default for the SG appliance, and requir es configuration for both browser and the interface card.
V olume 9: Managing t he Blue Coat SG Appliance 96 health check type The ki nd of device or service the speci fic he alth check tests. The following types are supported: • Forwarding host and for wa.
Appendix A: Glossary 97 issuer keyr ing The keyring used by the SG appliance to sign emulated certif icates . The keyring is configured on the applianc e and managed thr ough policy . L licensable component (LC) (Software) A subcomponent of a license; it is an option that enables or disables a specific feature.
V olume 9: Managing t he Blue Coat SG Appliance 98 Management Console A graphical W eb interface that lets you to manage, configure, monitor , and upgrade the SG appliance fr om any location. The Ma nagement Console consists of a set of W eb pages and Java applets stor ed on the SG appliance.
Appendix A: Glossary 99 non-cacheable objects A number of objects are not ca ched by the Blue Coat appliance because they ar e considered n on-cach eable.
V olume 9: Managing t he Blue Coat SG Appliance 100 parent class (bandwidth gain) A class with at least one ch ild. The par ent class must shar e its bandwidth with its child classes in proportion to t he minimum/maximum b andwidth values or priority levels.
Appendix A: Glossary 101 R real-time str eaming protocol (R TSP) A standard method of transferring audio and video and other time-based media over Internet-technology based networks.
V olume 9: Managing t he Blue Coat SG Appliance 102 SG appliance A Blue Coat security and cache box that can help manage security and content on a network.
Appendix A: Glossary 103 statistics Every Blue Coat appliance keeps statis tics of the appliance har dware and the objects it store s. Y ou can review the general summ ary , the volume, r esources alloc ated, cache efficienc y , cached contents, and cust om UR Ls generated by the appliance for various kinds of logs.
V olume 9: Managing t he Blue Coat SG Appliance 104 trial period Starting with the first boot, the tria l period pr ovides 60 days of fr ee operation. All features ar e enabled during this time. U unicast alias Defines an name on the appliance fo r a streaming URL.
105 Inde x A access logging 87 active sessions 76 bypassed connections 84 proxied sessions 77 ADN history 68 appliance certificat e 9 automatic service information, enabling 46 B bandwidth gain 64 ban.
V olume 9: Managing t he Blue Coat SG Appliance 106 event logging statisti cs 75 F failover st atistics 76 filter expressions for packet capturing 52 G graph scale 61 H health monitoring configuring 2.
Index 107 Simple Network Management Protocol, see SNMP snapshot jobs creating and editing 50 SNMP community strings 21 enabling 20 MIB variables 20 MIBs 20 traps 22 SSH-Console service 10 SSHv2 host k.
V olume 9: Managing t he Blue Coat SG Appliance 108.
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 Blue Coat Systems Blue Coat Systems SG Appliance 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 Blue Coat Systems Blue Coat Systems SG Appliance - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Blue Coat Systems Blue Coat Systems SG Appliance, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Blue Coat Systems Blue Coat Systems SG Appliance va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Blue Coat Systems Blue Coat Systems SG Appliance, 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 Blue Coat Systems Blue Coat Systems SG Appliance.
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 Blue Coat Systems Blue Coat Systems SG Appliance. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Blue Coat Systems Blue Coat Systems SG Appliance 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.
