From: yakout esmat (yesmat@xxxxxxxxxxxxxx)
Date: Fri Jul 26 2002 - 05:23:34 GMT-3
Ted,
This is a famous scenario, you know that BGP router will not advertise
networks unless they are known through IGP first, that only applies when you
leave synchronization ON (default). The networks have to be identical (same
mask length)
The networks in BGP table have to be marked best (>) before the router can
advertise them.
One of the most common reasons for no-synching is Router ID. Make sure that
the IGP router id is identical to BGP Router-id.
Give it a try and let's know.
HTH
Yakout
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Ted Richmond
Sent: Friday, July 26, 2002 5:24 PM
To: ccielab@groupstudy.com
Subject: BGP-OSPF question
Hi,
I have the following scenario:
ebgp ibgp ebgp
R8-----R6--ospf network---R1------R7
R8 belongs to AS1, R6&R1 to AS2 and R7 belongs to AS3.
AS2 has many routers/networks between R6 and R1.
R1 redistributes all ospf networks into BGP.
As a result, R7 gets all AS2 networks as BGP routes.
HOwever, R8 gets only AS2 networks that are directly
connected to R6.
'sh ip bgp' on R6 shows all AS2 networks as
not-synchronized. I really don't understand why other
networks in AS2 are not synchronized. They are learnt
via BGP and ospf too!!!
Any clarification on this is greatly appreciated.
Thanks,
Ted
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