From: Xiangling (xianglingzj@gmail.com)
Date: Sun Jan 07 2007 - 03:35:12 ART
It looks weird. Can you provide the output of command"sh ip bgp
108.201.15.0" on Vanilla and "sh ip bgp 62.120.0.0" on Staberry?
On 1/7/07, psuthar@cisco.com <psuthar@cisco.com> wrote:
>
> Hi,
> Need some basic help with BGP.
> I got two routers Vanilla and Straberry, in AS=409 (iBGP). In addition
> Vanilla
> has eBGP connection to Mint(AS=203), Straberry has eBGP connection to
> Chocolate
> (AS=507). Straberry advertise next-hop-self for neighbor to Vanilla.
> The config details are as follows : -
> Vanilla#sh runn | begin bgp
> router bgp 409
> no synchronization
> bgp log-neighbor-changes
> network 10.1.1.0 mask 255.255.255.0
> neighbor 10.1.1.3 remote-as 409 <<Straberry
> neighbor 62.129.48.1 remote-as 203
> neighbor 192.168.1.2 remote-as 409
> neighbor 192.168.2.2 remote-as 409
> no auto-summary
>
> Vanilla#sh ip bgp
> BGP table version is 7, local router ID is 62.129.48.2
> 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 0.0.0.0 0 32768 i
> * i 10.1.1.3 0 100 0 i
> * i10.2.2.0/24 192.168.1.2 0 100 0 ?
> * i10.2.3.0/24 192.168.1.2 0 100 0 ?
> * i10.2.5.0/24 192.168.1.2 0 100 0 ?
> * i10.200.1.0/24 192.168.2.2 0 100 0 ?
> * i10.200.3.0/24 192.168.2.2 0 100 0 ?
> * i10.200.5.0/24 192.168.2.2 0 100 0 ?
> *> 62.120.0.0/16 62.129.48.1 0 0 203 ?
> *> 62.121.0.0/16 62.129.48.1 0 0 203 ?
> *> 62.123.0.0/16 62.129.48.1 0 0 203 ?
> *> 62.129.48.0/30 62.129.48.1 0 0 203 ?
> * i108.201.14.0/30 10.1.1.3 0 100 0 507 ?
> * i108.201.15.0/24 10.1.1.3 0 100 0 507 ?
> * i108.201.17.0/24 10.1.1.3 0 100 0 507 ?
> * i108.201.19.0/24 10.1.1.3 0 100 0 507 ?
> * i192.168.1.0/30 192.168.1.2 0 100 0 ?
> * i192.168.2.0/30 192.168.2.2 0 100 0 ?
>
> Vanilla#sh ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
> area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
> Gateway of last resort is not set
>
> 10.0.0.0/24 is subnetted, 1 subnets
> C 10.1.1.0 is directly connected, Ethernet0/0
> 192.168.1.0/30 is subnetted, 1 subnets
> O 192.168.1.0 [110/74] via 10.1.1.4, 01:25:36, Ethernet0/0
> 62.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
> B 62.123.0.0/16 [20/0] via 62.129.48.1, 00:52:25
> B 62.120.0.0/16 [20/0] via 62.129.48.1, 00:52:25
> B 62.121.0.0/16 [20/0] via 62.129.48.1, 00:52:25
> C 62.129.48.0/30 is directly connected, Serial1/0
> 192.168.2.0/30 is subnetted, 1 subnets
> O 192.168.2.0 [110/74] via 10.1.1.4, 01:25:36, Ethernet0/0
> Straberry#sh runn | begin bgp
> router bgp 409
> no synchronization
> bgp log-neighbor-changes
> network 10.1.1.0 mask 255.255.255.0
> neighbor 10.1.1.2 remote-as 409
> neighbor 10.1.1.2 next-hop-self
> neighbor 108.201.14.1 remote-as 507
> neighbor 192.168.1.2 remote-as 409
> neighbor 192.168.2.2 remote-as 409
> no auto-summary
> !
> ip classless
> no ip http server
> ip pim bidir-enable
> !
> !
> !
> !
> line con 0
> line aux 0
> line vty 0 4
> !
> end
>
> Straberry#
> Straberry#sh ip bgp
> BGP table version is 6, local router ID is 108.201.14.2
> 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
> * i10.1.1.0/24 10.1.1.2 0 100 0 i
> *> 0.0.0.0 0 32768 i
> * i10.2.2.0/24 192.168.1.2 0 100 0 ?
> * i10.2.3.0/24 192.168.1.2 0 100 0 ?
> * i10.2.5.0/24 192.168.1.2 0 100 0 ?
> * i10.200.1.0/24 192.168.2.2 0 100 0 ?
> * i10.200.3.0/24 192.168.2.2 0 100 0 ?
> * i10.200.5.0/24 192.168.2.2 0 100 0 ?
> * i62.120.0.0/16 62.129.48.1 0 100 0 203 ?
> * i62.121.0.0/16 62.129.48.1 0 100 0 203 ?
> * i62.123.0.0/16 62.129.48.1 0 100 0 203 ?
> * i62.129.48.0/30 62.129.48.1 0 100 0 203 ?
> *> 108.201.14.0/30 108.201.14.1 0 0 507 ?
> *> 108.201.15.0/24 108.201.14.1 0 0 507 ?
> *> 108.201.17.0/24 108.201.14.1 0 0 507 ?
> *> 108.201.19.0/24 108.201.14.1 0 0 507 ?
> * i192.168.1.0/30 192.168.1.2 0 100 0 ?
> * i192.168.2.0/30 192.168.2.2 0 100 0 ?
> Straberry#
> Straberry#sh ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
> area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
> Gateway of last resort is not set
>
> 10.0.0.0/24 is subnetted, 1 subnets
> C 10.1.1.0 is directly connected, Ethernet0/0
> 108.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
> B 108.201.15.0/24 [20/0] via 108.201.14.1, 00:58:01
> C 108.201.14.0/30 is directly connected, Serial1/0
> B 108.201.17.0/24 [20/0] via 108.201.14.1, 00:58:01
> B 108.201.19.0/24 [20/0] via 108.201.14.1, 00:58:01
> 192.168.1.0/30 is subnetted, 1 subnets
> O 192.168.1.0 [110/74] via 10.1.1.4, 01:32:30, Ethernet0/0
> 192.168.2.0/30 is subnetted, 1 subnets
> O 192.168.2.0 [110/74] via 10.1.1.4, 01:32:30, Ethernet0/0
>
> Question:
> (1) Why Straberry is not advertising eBGP learned routes to Vanilla?.
> (2) From Vanilla,I can ping next-hop 10.1.1.3, but routes learned through
> this
> are not added into routing tables
> * i108.201.14.0/30 10.1.1.3 0 100 0 507 ?
> * i108.201.15.0/24 10.1.1.3 0 100 0 507 ?
> * i108.201.17.0/24 10.1.1.3 0 100 0 507 ?
> * i108.201.19.0/24 10.1.1.3 0 100 0 507 ?
>
> Thanks for help.
> Best regards,
>
> Prakash Suthar
>
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-- Thanks & Regards, Xiangling |-------------------------| | | \ I Love You All / \ / \___________/
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