Cisco Cisco IOS Software Release 12.2(27)SBC

Copyright © 2006 Cisco Systems, Inc. All rights reserved.

Cisco nonstop forwarding (NSF) with stateful switchover (SSO) is effective at increasing availability of 
network services. Cisco NSF with SSO provides continuous packet forwarding, even during a network 
processor hardware or software failure. In a redundant system, the secondary processor recovers control 
plane service during a critical failure in the primary processor. SSO synchronizes the network state 
information between the primary and the secondary processor.

Any Transport over MPLS (AToM) uses

 

NSF, SSO, and Graceful Restart to allow a Route Processor (RP) 

to recover from a disruption in control plane service without losing its MPLS forwarding state. 

In this document, the NSF/SSO—Any Transport over MPLS and AToM Graceful Restart feature is 
referred to as AToM NSF for brevity. 

Your software release may not support all the features documented in this module. For the latest feature 
information and caveats, see the release notes for your platform and software release. To find information 
about the features documented in this module, and to see a list of the releases in which each feature is 
supported, see the 

.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS 
software image support. To access Cisco Feature Navigator, go to 

.

 

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