Fall-over combined with next hop tracking creates another distinct feature called selective address tracking:
The following commands are new or modified for this feature: •bgp nexthop •neighbor fall-over http://www.cisco.com/en/US/docs/ios/12_4t/12_4t4/ht_bgpsn.html >> neighbor 192.168.25.7 fall-over route-map RTM-BGP- >> FALLOVER Cheers, Andrew CCIE 14715 Sent from my iPhone On Jun 25, 2013, at 1:16 AM, Saku Ytti <[email protected]> wrote: > On (2013-06-24 23:19 -0500), Andrew Brant wrote: > >> neighbor 192.168.25.7 fall-over route-map RTM-BGP- >> FALLOVER > Fall-over and next-hop tracking are two distinct features. > With next-hop tracking, you simply invalidate the next-hops there by > invalidating the routes and choosing next-best option. > With fall-over you tear down whole session, this is usually undesirably > large hammer, consider your IGP flap is very short, if you tore down the > iBGP it might take minutes to recover. > > But granted, if current version does not support selective next-hop > resolution it seems like significantly better than nothing. > > > -- > ++ytti > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
