From: Srikanth Nagarajan (nsrikanth@xxxxxxxxxxx)
Date: Tue Jul 06 1999 - 13:51:30 GMT-3
Hi ,
I suppose you must be running some IGP like OSPF (or) provide static routes
inorder for the IBGP peers to reach the destination.
Thanks
Srikanth N
>From: "Scott O'Donnell" <scotto@iworksys.com>
>Reply-To: "Scott O'Donnell" <scotto@iworksys.com>
>To: "ccielab@groupstudy.com" <ccielab@groupstudy.com>,
>"cisco@spot.colorado.edu" <cisco@spot.colorado.edu>
>Subject: BGP is driving me crazy.
>Date: Mon, 05 Jul 1999 23:02:41 -0400
>
>Hello,
>I hope I can explain this.
>
>I have setup five routers RA,RB,RC,RD,RE (left to right). All routers
>are connected in a row via serial links.
>
>Like this: RA ------ RB ------ RC ------- RD ------- RE
>
>I have the links assigned subnets as follows:
>RA->RB = 4.4.4.0/24
>RB->RC = 3.3.3.0/24
>RC->RD = 2.2.2.0/24
>RD->RE = 1.1.1.0/24
>
>RA is assigned and running BGP AS 400
>RB,RC,RD are assigned and running BGP AS 100, IBGP connections fully
>meshed.
>RE is assigned and running BGP AS 200
>
>RE is originating network 128.213.1.0/24 with a network command
>"Network 128.213.0.0"
>RD learns the 128.213.0.0 route and places it in it's table with the
>next hop as 1.1.1.1 (RE)
>RC learns the 128.213.0.0 route in it's BGP table (SHO IP BGP) but
>doesn't place it in the route table.
>RB learns the 128.213.0.0 route in it's BGP table (SHO IP BGP) but
>continues to display a console
>message "BGP: no valid path for 128.213.0.0/16" .
>
>Both RC and RB have routes in their route table for network 1.0.0.0/8
>
>rB#sho ip bgp
>BGP table version is 39, local router ID is 200.200.200.5
>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
>*>i1.0.0.0 2.2.2.2 0 100 0 i
>*>i2.0.0.0 2.2.2.2 0 100 0 i
>*>i3.0.0.0 2.2.2.1 1 100 0 i
>*> 110.0.0.0 4.4.4.4 0 0 400 i
>* i128.213.0.0 1.1.1.1 0 100 0 200 i
>*>i192.212.1.0 2.2.2.2 0 100 0 i
>
>sho ip route
>R 1.0.0.0/8 [120/2] via 3.3.3.3, Serial0
>R 2.0.0.0/8 [120/1] via 3.3.3.3, Serial0
> 3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
>S 3.0.0.0/8 is directly connected, Null0
>C 3.3.3.0/24 is directly connected, Serial0
> 4.0.0.0/24 is subnetted, 1 subnets
>C 4.4.4.0 is directly connected, Ethernet0
>B 110.0.0.0/8 [20/0] via 4.4.4.4
>R 192.212.1.0/24 [120/2] via 3.3.3.3, Serial0
>
>Why doesn't RB learn about the 128.213.0.0 network in AS 200?
>
>Am I missing the big picture?
>
>Scott
>
>
>
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