12-30-2008 05:50 AM - edited 03-04-2019 03:16 AM
I am having a problem while redistribution of BGP into EIGRP & the other way round. The problem is when i redistribute bgp into eigrp i get only the 1.1.1.0/24 network from R1 the rest of the networks from bgp don't appear in the routing table. The EIGRP route of 6.6.6.0/24 does appear in the routing table of BGP
Regards
Ryel.
Solved! Go to Solution.
12-30-2008 11:57 AM
Hello Ryel,
seeing the routes make me of think of the following
bgp redistribute-internal
To configure iBGP redistribution into an interior gateway protocol (IGP), such as IS-IS or OSPF, use the bgp redistribute-internal command in address family or router configuration mode. To return the router to default behavior and stop iBGP redistribution into IGPs, use the no form of this command.
bgp redistribute-internal
no bgp redistribute-internal
Syntax Description
This command has no arguments or keywords.
Defaults
IBGP routes are not redistributed into IGPs.
see
http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_bgp1.html#wp1014183
BGP routes from confederations are treated as iBGP for some aspects and as eBGP for others.
Try the lab without BGP confederations first and see if the above command is needed to achieve the desired result.
Later you can add again BGP confederations.
Hope to help
Giuseppe
12-30-2008 10:24 AM
Hello Ryel,
you have decided to use BGP confederations but BGP confederations commands are missing on R1.
I think at least bgp confederation identifier is needed everywhere
see
http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_bgp1.html#wp1012480
second note:
BGP routes learned via iBGP have AD 200 and are not preferred over IGP routes like OSPF (AD 110) or EIGRP (AD 90)
the redistribution of BGP into EIGRP will pass only the routes present in the BGP table that are also installed in the IP routing table.
So all iBGP routes overriden by IGP routes are not passed to EIGRP.
Hope to help
Giuseppe
12-30-2008 10:49 AM
Oh!! sorry the bgp confideration command on R1 was not there but i was playing around with the config to see if other things were going to work.
router bgp 4000
no synchronization
bgp log-neighbor-changes
bgp confederation identifier 2000
network 1.1.1.0 mask 255.255.255.0
redistribute eigrp 1 metric 2000
neighbor 13.0.0.2 remote-as 4000
neighbor 13.0.0.2 next-hop-self
This is the config on R1 now but still the other bgp routes are not coming in the routing table also i have sync tured off.
12-30-2008 11:22 AM
Hello Ryel,
I would suggest you to try the lab without any BGP confederations first with some iBGP and some eBGP sessions.
Track for each route which routing protocol provides the best route to the IP routing table maintaner process in terms of AD and metric
[AD metric]
expect that only B routes in R1 router IP routing table will be passed to EIGRP so some BGP routes you see in sh ip bgp can be missing
or also compare
sh ip bgp
sh ip route bgp
on router where BGP to EIGRP redistribution is performed
Hope to help
Giuseppe
12-30-2008 11:47 AM
12-30-2008 11:57 AM
Hello Ryel,
seeing the routes make me of think of the following
bgp redistribute-internal
To configure iBGP redistribution into an interior gateway protocol (IGP), such as IS-IS or OSPF, use the bgp redistribute-internal command in address family or router configuration mode. To return the router to default behavior and stop iBGP redistribution into IGPs, use the no form of this command.
bgp redistribute-internal
no bgp redistribute-internal
Syntax Description
This command has no arguments or keywords.
Defaults
IBGP routes are not redistributed into IGPs.
see
http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_bgp1.html#wp1014183
BGP routes from confederations are treated as iBGP for some aspects and as eBGP for others.
Try the lab without BGP confederations first and see if the above command is needed to achieve the desired result.
Later you can add again BGP confederations.
Hope to help
Giuseppe
12-30-2008 12:43 PM
thanks the command did help
Regards,
Ryel
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