From: Connary, Julie Ann (jconnary@xxxxxxxxx)
Date: Sun Dec 31 2000 - 14:31:43 GMT-3
Hi all,
I changed router 5 for a router running 12.0 and guess what- this went away
- no more external routes for 10.4.3.0 network.
I had noticed on R2 that it showed R5 sourcing this route.
Is this an 11.3 bug? Any ideas - very weird.
Julie Ann
At 11:43 AM 12/31/2000 -0500, Connary, Julie Ann wrote:
>Hi All,
>
>has anyone seen the following. I am doing the fatkid lab - advanced bgp.
>
>I have the following setup
>
>
>
>Term-Serv
>AS-100
> l 192.19.15.0
> |
>Router 4
>AS 10600
>AS 200 (confederation id)
> | .4
> | 10.4.3..0
> | .3
>router 3 - no BGP
> | .3
> | 10.5.3.0
> | .5
> | .5 10.5.2.0 .2
>Router 5 -----------------------------------------------Router 2
>AS 10060 AS 10060
>AS 200 (confederation id) AS 200 (confederation id)
>| 206.11.20.64 / 206.11.20.16
>| /
>| /
>Router 1------------------------------------------
>AS 300
>
>On R4 I see the following when I do a show ip bgp and show ip bgp 10.4.3.0
>
>r4#show ip bgp
>BGP table version is 6, local router ID is 10.0.0.4
>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
>*> 10.1.1.0/24 192.19.15.1 0 0 100 i
>* 10.4.3.0/24 10.5.3.3 1 100 0 (10060) i
>*> 10.5.3.3 1 100 0 (10060) i
>*> 20.1.1.0/24 192.19.15.1 0 0 100 i
>*> 22.1.1.0/24 192.19.15.1 0 0 100 i
>*> 24.1.1.0/24 192.19.15.1 0 0 100 i
>* 206.11.0.0/16 206.11.20.65 100 0 (10060) 300 i
>* 206.11.20.17 100 0 (10060) 300 i
>
>4#show ip bgp 10.4.3.0
>BGP routing table entry for 10.4.3.0/24, version 6
>Paths: (2 available, best #2, advertised over EBGP)
> (10060)
> 10.5.3.3 (metric 1) from 10.5.2.5 (10.0.0.5)
> Origin IGP, metric 1, localpref 100, valid, confed-external
> (10060)
> 10.5.3.3 (metric 1) from 10.5.2.2 (10.0.0.2)
> Origin IGP, metric 1, localpref 100, valid, confed-external, best
>
>Then on R1- it sees a 10.4.3.0 route:
>
>r1#show ip bgp
>BGP table version is 135, local router ID is 206.11.4.1
>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
>*> 10.1.1.0/24 206.11.20.18 0 200 100 i
>* 206.11.20.66 0 200 100 i
>* 10.4.3.0/24 206.11.20.66 1 0 200 i
>*> 206.11.20.18 0 200 i
>*> 20.1.1.0/24 206.11.20.18 0 200 100 i
>* 206.11.20.66 0 200 100 i
>*> 22.1.1.0/24 206.11.20.18 0 200 100 i
>* 206.11.20.66 0 200 100 i
>*> 24.1.1.0/24 206.11.20.18 0 200 100 i
>* 206.11.20.66 0 200 100 i
>*> 206.11.0.0/16 0.0.0.0 32768 i
>s> 206.11.4.0 0.0.0.0 0 32768 i
>s> 206.11.5.0 0.0.0.0 0 32768 i
>s> 206.11.6.0 0.0.0.0 0 3276
>
>
>Question is - why do I not see this for the 10.5.2.0 network?
>
>Here are my BGP configs for 2, 5 and 4
>
>Router 4 (OS Version: flash:c2500-ds-l.112-4.f1.bin)
>
>router bgp 10600
> bgp confederation identifier 200
> bgp confederation peers 10060
> neighbor 10.5.2.2 remote-as 10060
> neighbor 10.5.2.2 ebgp-multihop 255
> neighbor 10.5.2.2 update-source Ethernet0
> neighbor 10.5.2.2 next-hop-self
> neighbor 10.5.2.5 remote-as 10060
> neighbor 10.5.2.5 ebgp-multihop 255
> neighbor 10.5.2.5 update-source Ethernet0
> neighbor 10.5.2.5 next-hop-self
> neighbor 192.19.15.1 remote-as 100
>
>
>Router 2 ( OS Version: flash:c2500-ds-l.112-4.f1.bin)
>
>router bgp 10060
> bgp confederation identifier 200
> bgp confederation peers 10600
> neighbor 10.4.3.4 remote-as 10600
> neighbor 10.4.3.4 ebgp-multihop 255
> neighbor 10.4.3.4 update-source Ethernet0
> neighbor 10.5.2.5 remote-as 10060
> neighbor 206.11.20.17 remote-as 300
>
>
>router 5 (os Version: flash:mc3810-a2binr3v2-mz_113-1_MA7.bin)
>
>router bgp 10060
> bgp confederation identifier 200
> bgp confederation peers 10600
> network 10.4.3.0 mask 255.255.255.0
> neighbor 10.4.3.4 remote-as 10600
> neighbor 10.4.3.4 ebgp-multihop 255
> neighbor 10.4.3.4 update-source Ethernet0
> neighbor 10.5.2.2 remote-as 10060
> neighbor 206.11.20.65 remote-as 300
> no auto-summary
>
>
>Is this normal? Is this what R1 should see - a route only to 10.4.3.0 network?
>
>Julie Ann
>------------------------------------------------------------------------
> Julie Ann Connary
> | | Network Consulting Engineer
> ||| ||| Federal Support Program
> .|||||. .|||||. 13635 Dulles Technology Drive,
>Herndon VA 20171
> .:|||||||||:.:|||||||||:. Pager: 1-888-642-0551
> c i s c o S y s t e m s Email: jconnary@cisco.com
>
>------------------------------------------------------------------------
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