01-05-2009 05:31 AM - edited 03-04-2019 03:20 AM
hi all. am a BGP beginner. using GNS3 i tried to configure BGP but the internal router is not trusting the route coming from its nei in the same AS. i used the route-reflector command, it didnt work also tried the next-hop-self command but didnt work also. please can i get direction on how to go about it. thanks all
01-05-2009 06:47 AM
Hello Jay,
you probably need to disable synchronization if the route is not advertised in a IGP
router bgp xx
no sync
With sync on (default) the iBGP route is accepted, installed and advertised if it is known in the IGP in use (OSPF, EIGRP ...)
Hope to help
Giuseppe
01-05-2009 12:36 PM
Giuseppe,
Just one precision. The default is now to have synchronization disabled by default. That has been changed a long time ago (12.2T I believe).
Synchronization might still be the issue depending on the software version that was used in this specific case.
Regards
01-05-2009 02:45 PM
Hello Harold,
thanks I had missed the change
10.0
This command was introduced.
12.0(7)T
Address family configuration mode was added.
>>>12.2(8)T
>>>Command default behavior changed to disabled.
http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_bgp5.html#wp1018615
Best Regards
Giuseppe
01-06-2009 12:28 AM
oh thanks for your support. i have been able to rectify the problem but another problem now comes up. i see this sign r> on routes coming from an internal router in the same AS. what does it mean?
01-06-2009 12:46 AM
oh thanks for your support. i have been able to rectify the problem but another problem now comes up. i see this sign r> on routes coming from an internal router in the same AS. what does it mean?
01-05-2009 12:38 PM
Jerome,
Can you provide a "show ip bgp
Regards
01-06-2009 12:28 AM
oh thanks for your support. i have been able to rectify the problem but another problem now comes up. i see this sign r> on routes coming from an internal router in the same AS. what does it mean?
01-06-2009 01:09 AM
Hello Jay,
a r sign means that the route is received but it is regarded as not totally correct
r means RIB failure.
It may mean the local router has a better route for the prefix then the one received in iBGP
try to compare
sh ip bgp
and
sh ip route
Hope to help
Giuseppe
01-06-2009 01:19 AM
thanks giuseppe. the meaning was a lower cost route was present in the IP routing table. you are the best.
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