BGP advertised routes

[Nagabhushana Bhatta K]

Hi All,

Is it possible to find since how long a route being advertised to BGP neighbor?

To elaborate, if EBGP neighbors are up since 24 hours and among 10 routes advertised, at receiving router, 5 routes show the uptime as 12 hours, whereas other 5 routes show the uptime as 24 hours.

All 10 routes were present in advertising router's routing table for more than 24 hours.

Regards,

Nagabhushan

[milan.kulik]

Hi,

when you issue on the advertising router

sh ip route x.x.x.x

for one particular prefix among those showing  the uptime as 12 hours on the other router, do you see any " Last update from ... xxx ago"?

That should show you the last time the routing was changed on the advertising router (and BGP should have advertised the change that time).

Best regards,

Milan