Cisco Systems Cisco IOS XR Manual De Usuario

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 engineer. The TAC Service Request Tool is located at this URL:

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 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:

To ensure that all service requests are reported in a standard format, Cisco has established severity 
definitions.

Severity 1 (S1)—An existing 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 operations 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 the network is impaired while 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.

Information about Cisco products, technologies, and network solutions is available from various online 
and printed sources.

The Cisco Product Quick Reference Guide is a handy, compact reference tool that includes brief 
product overviews, key features, sample part numbers, and abbreviated technical specifications for 
many Cisco products that are sold through channel partners. It is updated twice a year and includes 
the latest Cisco channel product offerings. To order and find out more about the Cisco Product Quick 
Reference Guide, go to this URL: