From: mcaplan.cs@xxxxxxxxxxxxxxx
Date: Thu May 03 2001 - 14:38:56 GMT-3
Hi,
I have a question regarding the effects of no-sync on BGP.
The rule for synch, as far as I know is that an IBGP peer will not advertise
a BGP route to another peer (IBGP or EBGP) if that route does not exist in
the IGP.
>From my observations, a corollary to that is that a BGP peer will not
install learnt BGP routes into the routing table if sync is turned on
(assuming no redistribution). This is shown by comparing 'sh ip bgp' with
'sh ip route'; if sync is on, then routes will be visible in the BGP routing
table, but will not be in the IP routing table. To get these BGP routes into
the IP routing table, one has to simply do a 'no sync'.
I'm just thinking aloud here, but I would appreciate some confirmation of my
logic.
Thanks
Mark
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