12-08-2006 07:56 AM - edited 03-05-2019 01:15 PM
Trying to setup a mock backup scenario with a few routers. BGP is working ok, but not redisributing in EIGRP
Basic Setup:
RA <-> RB <-> RD <-> RSw F
I have the following configured on each box.
Router A:
int e0
ip address 10.216.110.1 255.255.255.0
int loopback 0
ip address 10.205.10.1
EIGRP 100
network 10.0.0.0
BGP 64001
redistribute eigrp 100
network 10.0.0.0
neighbor 10.216.110.2 remote-as 64002
no sync
no auto-summary
Router B:
int e0
ip address 10.216.110.2 255.255.255.0
int e1
ip address 10.216.200.2 255.255.255.0
BGP 64002
network 10.0.0.0
neighbor 10.216.110.1 remote-as 64001
neighbor 10.216.200.1 remote-as 64004
no sync
no auto-summary
Router D:
int e0
ip address 10.216.200.1 255.255.255.0
int e1
ip address 10.200.100.2 255.255.255.0
EIGRP 100
redistribute bgp 64004
network 10.0.0.0
BGP 64004
redistribute eigrp 100
network 10.0.0.0
neighbor 10.216.200.2 remote-as 64002
no sync
no auto-summary
Switch 4506 F:
ip routing
int vlan 1
ip address 10.200.100.1 255.255.255.0
int loopback 0
ip address 10.205.105.1
EIGRP 100
network 10.0.0.0
......
What happens is all loopback interfaces and routes from Router A make it to B & D. All routers from Switch F make it to Router D, B, and A. But the routes from A & B that are seen in D do not get redistributed into EIGRP to F. Any ideas?
12-08-2006 08:07 AM
Hi,
I guess this is something to do with the Route Summarization / Auto Summary.
Request you to paste the sh ip route output from the D and F devices.
Regards,
Wilson Samuel
12-08-2006 08:36 AM
When you redistribute things into eigrp you must specify a metric or use the default metric command. If you don't it sorta ignore the redistribution command. I think the only one that works without a metric is another eigrp or igrp.
12-08-2006 11:44 AM
this may apply in your case may need no auto summary on the EIGRP process.
By default, BGP does not accept subnets redistributed from IGP. To advertise and carry subnet routes in BGP, use an explicit network command or the no auto-summary command. If you disable auto-summarization and have not entered a network command, you will not advertise network routes for networks with subnet routes unless they contain a summary route.
EIGRP summary routes are given an administrative
value of 5. You cannot configure this value.
RIP Version 1 always uses automatic summarization. If you are using RIP Version 2, you can turn off automatic summarization by specifying no auto-summary. Disable automatic summarization if you must perform routing between disconnected subnets. When automatic summarization is off, subnets are advertised.
Examples
The following example disables automatic summarization for process eigrp 109:
router eigrp 109
no auto-summary
12-09-2006 08:33 AM
Hi Jacob,
When you redistribute routes from BGP into an IGP, by default only EBGP routes are redistributed.
You can issue the bgp redistribute-internal command followed by clearing all BGP sessions to permit the redistribution of IBGP routes in addition to EBGP routes.
(config-router)#bgp redistribute-internal
#clear ip bgp *
HTH, rate if it does
Narayan
12-09-2006 11:21 PM
hi
i totaly agree with the post of (tdrais), when you redistribute route into rip/IGRP/EIGRP the metric is infinity that means that the redistributed routes are unreachable ( not present in the routing table ) so you have to specify a seed metric for that. use (default-metric a b c d e ) or (redistribute bgp xxx metric a b c d e).
HTH
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