Table Of Contents
Cisco Clock Module CLK-7600 Installation Note
Contents
Document Revision History
Parts List
Required Tools
Safety Overview
Checking the Clock Module
Replacing the Clock Module
Replacing the Clock Module on a Cisco 7603 Router, a Cisco 7604 Router, a Cisco 7606 Router, a Catalyst 6503 Switch, or a Catalyst 6504 Switch
Replacing the Clock Module on a Cisco 7609 Router or a Catalyst 6509-NEBS-A Switch
Verifying the Installation
Related Documentation
Obtaining Documentation
Cisco.com
Documentation DVD
Ordering Documentation
Documentation Feedback
Cisco Product Security Overview
Reporting Security Problems in Cisco Products
Obtaining Technical Assistance
Cisco Technical Support Website
Submitting a Service Request
Definitions of Service Request Severity
Obtaining Additional Publications and Information
Cisco Clock Module CLK-7600 Installation Note
Product Number: CLK-7600=
This publication describes how to check the status of the clock module and describes how to remove and install the clock modules on the Cisco 7603, Cisco 7604, Cisco 7606, and Cisco 7609 routers, and on the Catalyst 6503, Catalyst 6504, and Catalyst 6509-NEBS-A switches. Clock modules are shown below.
Router/Switch
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Clock Module Part Number
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Cisco 7603 router, Cisco 7604 router, Cisco 7606 router, Cisco 7609 router, Catalyst 6503, Catalyst 6504, Catalyst 6509-NEBS-A
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CLK-7600=
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Note 
For information on replacing the VTT modules on the Cisco 7606 and Cisco 7609 routers, refer to the Cisco Clock Module (WS-C6K-CL and WS-C6513-CL) and VTT Module (WS-C6K-VTT) Installation Note at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/cfgnotes/78_10498.htm.
Contents
This publication consists of the following sections:
•Document Revision History
•Parts List
•Required Tools
•Safety Overview
•Checking the Clock Module
•Replacing the Clock Module
•Verifying the Installation
•Related Documentation
•Obtaining Documentation
•Documentation Feedback
•Cisco Product Security Overview
•Obtaining Technical Assistance
•Obtaining Additional Publications and Information
Document Revision History
Revision
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Date
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Change Summary
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OL-6267-3
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April, 2005
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•Added Cisco 7604 router and Catalyst 6504 switch.
•Added Document Revision History table.
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Parts List
These parts are included in the replacement kit:
•One clock module (CLK-7600=)
•One disposable grounding wrist strap
•One bag of spare clock module screws
Required Tools
These tools are required to perform the installation:
•Number 1 Phillips screwdriver
•Your own ESD-prevention equipment or the disposable grounding wrist strap included with all upgrade kits, field-replaceable units (FRUs), and spares
Note Refer to the Cisco 7600 Series Router Installation Guide for ESD details, including the locations of the ESD connectors on the Cisco 7600 series routers.
Safety Overview
Safety warnings appear throughout this publication in procedures that may harm you if performed incorrectly. A warning symbol precedes each warning statement.
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Warning This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
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Waarschuwing
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Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen. Voor vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het document Regulatory Compliance and Safety Information (Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit toestel is ingesloten.
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Varoitus
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Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).
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Attention
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Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements figurant dans cette publication, consultez le document Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui accompagne cet appareil.
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Warnung
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Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unfällen bewußt. Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information (Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät geliefert wurde.
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Avvertenza
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Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti. La traduzione delle avvertenze riportate in questa pubblicazione si trova nel documento Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) che accompagna questo dispositivo.
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Advarsel
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Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) som ble levert med denne enheten.
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Aviso
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Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos físicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir possíveis acidentes. Para ver as traduções dos avisos que constam desta publicação, consulte o documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) que acompanha este dispositivo.
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¡Advertencia!
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Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentes. Para ver una traducción de las advertencias que aparecen en esta publicación, consultar el documento titulado Regulatory Compliance and Safety Information (Información sobre seguridad y conformidad con las disposiciones reglamentarias) que se acompaña con este dispositivo.
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Varning!
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Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanligt förfarande för att förebygga skador. Se förklaringar av de varningar som förkommer i denna publikation i dokumentet Regulatory Compliance and Safety Information (Efterrättelse av föreskrifter och säkerhetsinformation), vilket medföljer denna anordning.
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Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Warning Before you install, operate, or service the system, read the Site Preparation and Safety Guide. This guide contains important safety information you should know before working with the system.
Warning During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself.
Checking the Clock Module
To verify the status of the clock module on systems running Cisco IOS software, enter the show environment status command.
This example shows how to check the status of the clock module on a Cisco 7600 series router running Cisco IOS software:
Router> show environment status
clock 1 OK:not OK, clock 1 clock-inuse:not-in-use
clock 2 OK:OK, clock 2 clock-inuse:in-use
The above example shows a failure with clock 1 (clock module A).
Note Clock module A refers to clock 1 and clock module B refers to clock 2.
Note The clock module on a Cisco 7609 router or on a Catalyst 6509-NEBS-A switch contains dual redundant clocks (clock 1 and clock 2) on one module.
Replacing the Clock Module
Note You must remove all power from the Cisco 7600 series router before replacing the clock module.
Warning This unit might have more than one power supply connection. All connections must be removed to de-energize the unit.
The clock module is installed as follows:
•Behind power supply 1 (the lower power supply) on the Cisco 7603 router or Catalyst 6503 switch (see Figure 1)
•Behind power supply 1 (the lower power supply) on the Cisco 7604 router or Catalyst 6504 switch (see Figure 2)
•Behind power supply 2 (the upper power supply) for the Cisco 7606 router (see Figure 3)
•At the rear of the cabinet (the upper half) on the Cisco 7609 router or Catalyst 6509-NEBS-A switch (see Figure 4)
Figure 1 Cisco 7603 Router and Catalyst 6503 Switch Clock Module Location
Note Power supply 1 is not shown in the above illustration.
Figure 2 Cisco 7604 Router and Catalyst 6504 Clock Module Location
Note Power supply 1 is not shown in the above illustration.
Figure 3 Cisco 7606 Router Clock Module Location
Note Power supply 2 is not shown in the above illustration.
Figure 4
Cisco 7609 Router and Catalyst 6509-NEBS-A Switch Clock Module Location
Caution Always use an ESD wrist strap when handling modules or coming into contact with internal components.
Replacing the Clock Module on a Cisco 7603 Router, a Cisco 7604 Router, a Cisco 7606 Router, a Catalyst 6503 Switch, or a Catalyst 6504 Switch
To replace the clock module on a Cisco 7603 router, a Cisco 7604 router, a Cisco 7606 router, a Catalyst 6503 switch or a Catalyst 6504 switch, perform these steps:
Note You must remove all power from the Cisco 7600 series router before replacing the clock module.
Step 1 Power down the router as follows:
a. For a DC power supply, power down the router, verify that power is off to the DC circuit connected to the power supply, and remove the power supply. (Refer to Chapter 5, "Removal and Replacement Procedures," in the Cisco 7600 Series Router Installation Guide, or refer to Chapter 4, "Removal and Replacement Procedures," in the Catalyst 6500 Series Switches Installation Guide.)
b. For an AC power supply, disconnect the power cord from the power source, and remove the power supply. Do not touch the metal prongs on the power cord when it is still connected to the power supply. (Refer to Chapter 5, "Removal and Replacement Procedures," in the Cisco 7600 Series Router Installation Guide, or refer to Chapter 4, "Removal and Replacement Procedures," in the Catalyst 6500 Series Switches Installation Guide.)
Step 2 Locate the clock module. (See Figure 1 for Cisco 7603 router and Catalyst 6503 switch, Figure 2 for a Cisco 7604 router and Catalyst 6504 switch, and Figure 3 for the Cisco 7606 router.
Note Note the position of the clock module before you remove it from the chassis because you must install the new clock module in the same position.
Step 3 Remove the three securing screws that secure the clock module.
Step 4 Carefully lift and remove the clock module, placing it on an antistatic mat or foam.
Step 5 Remove the new clock module from the antistatic bag.
Step 6 Hold the clock module with the plug away from you.
Step 7 Carefully press the clock module onto the connector.
Step 8 Replace the three securing screws.
Step 9 Install the power supply. (Refer to Chapter 5, "Removal and Replacement Procedures," in the Cisco 7600 Series Router Installation Guide, or refer to Chapter 4, "Removal and Replacement Procedures," in the Catalyst 6500 Series Switches Installation Guide.)
Replacing the Clock Module on a Cisco 7609 Router or a Catalyst 6509-NEBS-A Switch
To replace the clock module on a Cisco 7609 router or a Catalyst 6509-NEBS-A switch, perform these steps:
Step 1 Power down the router as follows:
a. For a DC power supply, power down the router, verify that power is off to the DC circuit connected to the power supply, and remove the power supply. (Refer to Chapter 5, "Removal and Replacement Procedures," in the Cisco 7600 Series Router Installation Guide, or refer to Chapter 4, "Removal and Replacement Procedures," in the Catalyst 6500 Series Switches Installation Guide.)
b. For an AC power supply, disconnect the power cord from the power source. Do not touch the metal prongs on the power cord when it is still connected to the power supply or power entry module (PEM). (Refer to Chapter 5, "Removal and Replacement Procedures," in the Cisco 7600 Series Router Installation Guide, or refer to Chapter 4, "Removal and Replacement Procedures," in the Catalyst 6500 Series Switches Installation Guide.)
Step 2 Locate the clock module. (See Figure 4 for the Cisco 7609 router and Catalyst 6509-NEBS-A switch.)
Note Note the position of the clock module before you remove it from the chassis because you must install the new clock module in the same position.
Step 3 Remove the three securing screws that secure the clock module.
Step 4 Carefully lift and remove the clock module, placing it on an antistatic mat or foam.
Step 5 Remove the new clock module from the antistatic bag.
Step 6 Hold the clock module with the plug away from you.
Step 7 Carefully press the clock module onto the connector.
Step 8 Replace the three securing screws.
Step 9 Reconnect power to the supply. (Refer to Chapter 5, "Removal and Replacement Procedures," in the Cisco 7600 Series Router Installation Guide, or refer to Chapter 4, "Removal and Replacement Procedures," in the Catalyst 6500 Series Switches Installation Guide.)
Verifying the Installation
To verify the status of the clock module, perform these steps:
Step 1 Power up the router or switch.
Step 2 From the EXEC prompt (Router>), enter enable to enter privileged EXEC mode.
Step 3 Enter the password assigned to the system.
Step 4 Enter the show environment status command to verify the status of the replaced clock module.
This example shows that the clock module is functioning properly:
Router> show environment status
clock 1 OK:OK, clock 1 clock-inuse:in-use
clock 2 OK:OK, clock 2 clock-inuse:not-in-use
Note Clock module A refers to clock 1 and clock module B refers to clock 2.
Related Documentation
For additional information on Cisco 7600 series routers, Catalyst 6500 series switches, and command-line interface (CLI) commands, refer to the following publications:
•Cisco 7600 Series Router Installation Guide
•Cisco 7600 Series Cisco IOS Software Configuration Guide, 12.1E
•Cisco 7600 Series Router Cisco IOS Command Reference, 12.1E
•Cisco 7600 Series Cisco IOS Software Configuration Guide, 12.2SX
•Cisco 7600 Series Cisco IOS Command Reference, 12.2SX
•Regulatory Compliance and Safety Information for the Cisco 7600 Series Routers
•Catalyst 6500 Series Switches Installation Guide
•Catalyst 6500 Series Cisco IOS Software Configuration Guide, 12.1E
•Catalyst 6500 Series Cisco IOS Command Reference, 12.1E
•Catalyst 6500 Series Cisco IOS Software Configuration Guide, 12.2SX
•Catalyst 6500 Series Cisco IOS Command Reference, 12.2SX
•Regulatory Compliance and Safety Information for the Catalyst 6500 Series Switches
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation at this URL:
http://www.cisco.com/univercd/home/home.htm
You can access the Cisco website at this URL:
http://www.cisco.com
You can access international Cisco websites at this URL:
http://www.cisco.com/public/countries_languages.shtml
Documentation DVD
Cisco documentation and additional literature are available in a Documentation DVD package, which may have shipped with your product. The Documentation DVD is updated regularly and may be more current than printed documentation. The Documentation DVD package is available as a single unit.
Registered Cisco.com users (Cisco direct customers) can order a Cisco Documentation DVD (product number DOC-DOCDVD=) from the Ordering tool or Cisco Marketplace.
Cisco Ordering tool:
http://www.cisco.com/en/US/partner/ordering/
Cisco Marketplace:
http://www.cisco.com/go/marketplace/
Ordering Documentation
You can find instructions for ordering documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm
You can order Cisco documentation in these ways:
•Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Ordering tool:
http://www.cisco.com/en/US/partner/ordering/
•Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 1 800 553-NETS (6387).
Documentation Feedback
You can send comments about technical documentation to bug-doc@cisco.com.
You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883
We appreciate your comments.
Cisco Product Security Overview
Cisco provides a free online Security Vulnerability Policy portal at this URL:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
From this site, you can perform these tasks:
•Report security vulnerabilities in Cisco products.
•Obtain assistance with security incidents that involve Cisco products.
•Register to receive security information from Cisco.
A current list of security advisories and notices for Cisco products is available at this URL:
http://www.cisco.com/go/psirt
If you prefer to see advisories and notices as they are updated in real time, you can access a Product Security Incident Response Team Really Simple Syndication (PSIRT RSS) feed from this URL:
http://www.cisco.com/en/US/products/products_psirt_rss_feed.html
Reporting Security Problems in Cisco Products
Cisco is committed to delivering secure products. We test our products internally before we release them, and we strive to correct all vulnerabilities quickly. If you think that you might have identified a vulnerability in a Cisco product, contact PSIRT:
•Emergencies — security-alert@cisco.com
•Nonemergencies — psirt@cisco.com
Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product to encrypt any sensitive information that you send to Cisco. PSIRT can work from encrypted information that is compatible with PGP versions 2.x through 8.x.
Never use a revoked or an expired encryption key. The correct public key to use in your correspondence with PSIRT is the one that has the most recent creation date in this public key server list:
http://pgp.mit.edu:11371/pks/lookup?search=psirt%40cisco.com&op=index&exact=on
In an emergency, you can also reach PSIRT by telephone:
•1 877 228-7302
•1 408 525-6532
Obtaining Technical Assistance
For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, Cisco Technical Support provides 24-hour-a-day, award-winning technical assistance. The Cisco Technical Support Website on Cisco.com features extensive online support resources. In addition, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not hold a valid Cisco service contract, contact your reseller.
Cisco Technical Support Website
The Cisco Technical Support Website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day, 365 days a year, at this URL:
http://www.cisco.com/techsupport
Access to all tools on the Cisco Technical Support Website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:
http://tools.cisco.com/RPF/register/register.do
Note Use the Cisco Product Identification (CPI) tool to locate your product serial number before submitting a web or phone request for service. You can access the CPI tool from the Cisco Technical Support Website by clicking the Tools & Resources link under Documentation & Tools. Choose Cisco Product Identification Tool from the Alphabetical Index drop-down list, or click the Cisco Product Identification Tool link under Alerts & RMAs. The CPI tool offers three search options: by product ID or model name; by tree view; or for certain products, by copying and pasting show command output. Search results show an illustration of your product with the serial number label location highlighted. Locate the serial number label on your product and record the information before placing a service call.
Submitting a Service Request
Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool provides recommended solutions. If your issue is not resolved using the recommended resources, your service request is assigned to a Cisco TAC engineer. The TAC Service Request Tool is located at this URL:
http://www.cisco.com/techsupport/servicerequest
For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553-2447
For a complete list of Cisco TAC contacts, go to this URL:
http://www.cisco.com/techsupport/contacts
Definitions of Service Request Severity
To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.
Severity 1 (S1)—Your network is "down," or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.
Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.
Severity 3 (S3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.
Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online and printed sources.
•Cisco Marketplace provides a variety of Cisco books, reference guides, and logo merchandise. Visit Cisco Marketplace, the company store, at this URL:
http://www.cisco.com/go/marketplace/
•Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL:
http://www.ciscopress.com
•Packet magazine is the Cisco Systems technical user magazine for maximizing Internet and networking investments. Each quarter, Packet delivers coverage of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as well as network deployment and troubleshooting tips, configuration examples, customer case studies, certification and training information, and links to scores of in-depth online resources. You can access Packet magazine at this URL:
http://www.cisco.com/packet
•iQ Magazine is the quarterly publication from Cisco Systems designed to help growing companies learn how they can use technology to increase revenue, streamline their business, and expand services. The publication identifies the challenges facing these companies and the technologies to help solve them, using real-world case studies and business strategies to help readers make sound technology investment decisions. You can access iQ Magazine at this URL:
http://www.cisco.com/go/iqmagazine
•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:
http://www.cisco.com/ipj
•World-class networking training is available from Cisco. You can view current offerings at this URL:
http://www.cisco.com/en/US/learning/index.html
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All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0501R)
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