[c-nsp] bgp redistribution timers

[Uddin, Tahir]

Sorry, I didn't mean to imply there were redistribution timers. 
Just to clarify, in the scenario below, how long would it be before
router R4 chooses the next Feasible successor with the timers previously
listed for a single route that disappeared from R1s routing table. 

R1------R2-----R3-----R4
    BGP    EIGRP  EIGRP

Thanks


-----Original Message-----
From: Oliver Boehmer (oboehmer) [mailto:oboehmer at cisco.com] 
Sent: Thursday, March 20, 2008 11:57 AM
To: Uddin, Tahir; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] bgp redistribution timers

Uddin, Tahir <> wrote on Thursday, March 20, 2008 4:27 PM:

> If I have a bgp timer of 30 90 seconds and redistributing into eigrp
> with default timers 5 15 seconds, would the downstream eigrp neighbor
> reroute after 90 seconds or 90 + 15 = 105 seconds.

there is no such thing as a "redistribution timer", the timers you've
mentioned are related to hello/adjacency management, i.e. to declare a
neighbor dead. Once EIGRP or BGP notice a route going away (for whatever
reason), this will be reflected pretty much immediately in the other
routing protocol and updates will be sent. You need to take into account
protocol-specific timers such as minimum-advertisement-interval for BGP,
but there is no delay in the actual redistribution mechanism..

	oli


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