From: Daniel Cisco Group Study (danielcgs@imc.net.au)
Date: Sun Feb 23 2003 - 01:24:09 GMT-3
Syv,
In addition to comments made by others, make sure there's an IBGP session between R7 & R9 (IBGP peers need to be fully meshed). Alternatively, configure R3 as a route reflector.
Daniel
-----Original Message-----
From: Syv Ritch [mailto:syv@911networks.com]
Sent: Sunday, 23 February 2003 06:04
To: ccielab@groupstudy.com
Subject: BGP Missing routes
Hi,
I am missing some routes in BGP [sho ip bgp].
The network is:
R9 [65109] <--> R3 [65109] <--> R7 [65109]
^ ^ ^
| | |
v v v
R5 [65110] <--> R2 [65110] <--> R6 [65110]
R9 has 2 loopbacks: 10.108.99.99/24 and 10.108.199.199/24
R3 has 2 loopbacks: 10.108.33.33/24 and 10.108.133.133/24
and so on..
All the routers peers through 99.99, 33.33 and so on..
Here is the config for R3
router bgp 65109
bgp router-id 33.33.33.33
bgp cluster-id 174884229
bgp log-neighbor-changes
network 10.108.133.0 mask 255.255.255.0
neighbor ibgp peer-group
neighbor ibgp update-source Loopback0
neighbor ebgp peer-group
neighbor ebgp ebgp-multihop 2
neighbor ebgp update-source Loopback0
neighbor 10.108.22.22 remote-as 65110
neighbor 10.108.22.22 peer-group ebgp
neighbor 10.108.77.77 remote-as 65109
neighbor 10.108.77.77 peer-group ibgp
neighbor 10.108.99.99 remote-as 65109
neighbor 10.108.99.99 peer-group ibgp
!
All the other ones are similar
----------------------------------------
When doing a show ip bgp on R9, I am missing the network from R7
BGP table version is 3, local router ID is 99.99.99.99
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
* i10.108.122.0/24 10.108.22.22 0 100 0 65110 i
* i10.108.133.0/24 10.108.33.33 0 100 0 i
*> 10.108.155.0/24 10.108.55.55 0 0 65110 i
* i 10.108.22.22 100 0 65110 i
* i10.108.166.0/24 10.108.22.22 100 0 65110 i
*> 10.108.199.0/24 0.0.0.0 0 32768 i
TS-2512#7
----------------------------------------
When doing a show ip bgp on R7, I am missing the network from R9
BGP table version is 3, local router ID is 77.77.77.77
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
* i10.108.122.0/24 10.108.22.22 0 100 0 65110 i
* i10.108.133.0/24 10.108.33.33 0 100 0 i
* i10.108.155.0/24 10.108.22.22 100 0 65110 i
* i10.108.166.0/24 10.108.22.22 100 0 65110 i
*> 10.108.66.66 0 0 65110 i
*> 10.108.177.0/24 0.0.0.0 0 32768 i
----------------------------------------
When doing a show ip bgp on R3, I get all the routes that I am expecting
BGP table version is 5, local router ID is 33.33.33.33
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
*> 10.108.122.0/24 10.108.22.22 0 0 65110 i
*> 10.108.133.0/24 0.0.0.0 0 32768 i
* i10.108.155.0/24 10.108.55.55 0 100 0 65110 i
*> 10.108.22.22 0 65110 i
*> 10.108.166.0/24 10.108.22.22 0 65110 i
* i 10.108.66.66 0 100 0 65110 i
* i10.108.177.0/24 10.108.77.77 0 100 0 i
* i10.108.199.0/24 10.108.99.99 0 100 0 i
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