BGP - Synchronization

From: Tarek Sabry (tsabry@xxxxxxxxxxxxxxxxxxx)
Date: Wed Mar 27 2002 - 19:06:42 GMT-3


   
I can get things to work with "no sync", but I was wondering why they are
not otherwise. My understanding is that if the route does exist in the IGP
then it should be OK for advertising. What am I missing?

Below is an illustration for my case for the 88.0.0.0 network.

Thanks
Tarek

r3#sh ip bgp
BGP table version is 1, local router ID is 200.0.0.3
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network Next Hop Metric LocPrf Weight Path
* i8.8.8.0/24 10.10.0.8 0 100 0 i
* i88.0.0.0 10.10.0.8 0 100 0 i
* i192.168.1.0 10.10.0.8 0 100 0 i
* i192.168.2.0 10.10.0.8 0 100 0 i
r3#
r3#
r3#
r3#
r3#sh ip route 88.0.0.0 255.0.0.0
Routing entry for 88.0.0.0/8
  Known via "ospf 1", distance 110, metric 65, type inter area
  Redistributing via ospf 1
  Last update from 10.10.0.8 on Serial0.1, 02:10:35 ago
  Routing Descriptor Blocks:
  * 10.10.0.8, from 10.10.0.8, 02:10:35 ago, via Serial0.1
      Route metric is 65, traffic share count is 1
r3#
r3#
r3#
r3#
r3#sh ip bgp 88.0.0.0
BGP routing table entry for 88.0.0.0/8, version 0
Paths: (1 available, no best path)
  Not advertised to any peer
  Local, (Received from a RR-client)
    10.10.0.8 (metric 64) from 10.10.0.8 (8.8.8.8)
      Origin IGP, metric 0, localpref 100, valid, internal, not
synchronized, ref 2
r3#
r3#

-----------------------------------------
Tarek Sabry
Senior Network Engineer
Schlumberger Network Solutions
-----------------------------------------



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