| Publisher | Cisco Systems | ||
|---|---|---|---|
| Format | 55.0KB PDF | Date added | 01 Feb 2005 |
| Topics | Switching | ||
| Downloads | 94 | ||
Cisco Nonstop Forwarding (NSF) with Stateful SwitchOver (SSO) is a Cisco innovation for routers with dual route processors. Cisco NSF with SSO allows a router, which has experienced a hardware or software failure of an active route processor, to maintain data link layer connections and continue forwarding packets during the switchover to the Standby route processor. This forwarding can continue despite the loss of routing protocol peering arrangements with other routers. Routing information is recovered dynamically, in the background, while packet forwarding proceeds uninterrupted. Service Provider environments can benefit from the initial release of Cisco NSF with SSO in Cisco IOS Software Release 12.0(22)S. It includes support for the Border Gateway Protocol (BGP), Open Shortest Path First (OSPF) and Intermediate System-Intermediate System (IS-IS) routing protocols.
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