Cisco Cisco IOS Software Release 12.2(33)SRE

The BGP Support for Next-Hop Address Tracking feature is enabled by default when a supporting 
Cisco IOS software image is installed. BGP next-hop address tracking is event driven. BGP prefixes are 
automatically tracked as peering sessions are established. Next-hop changes are rapidly reported to the 
BGP routing process as they are updated in the Routing Information Base (RIB). This optimization 
improves overall BGP convergence by reducing the response time to next-hop changes for routes 
installed in the RIB. When a best path calculation is run in between BGP scanner cycles, only next-hop 
changes are tracked and processed. 

Configuration information is included in the “Configuring Advanced BGP Features” chapter of the 

, Release 12.4T, at the following URL:

Command reference information is included in the Cisco IOS IP Routing Protocols Command Reference, 
Release 12.2SR, at the following URL:

The following command is modified for this feature:

Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and 
figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and 
coincidental.

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