From: John Matijevic (matijevi@bellsouth.net)
Date: Mon Aug 18 2003 - 13:46:09 GMT-3
Hello Larry,
Im not quite understanding what the problem is in particular the following:
The BGP routes from other AS (loopbacks) are in the table for 60s with *>,
then 60s with only > on both R2 and R3.
R1 only sees R3 loop when R2 has *> (obviously).
Can you please try to rephrase what you mean here?
Also could you post sh ip route, and sh ip bgp, on all 3 routers?
Sincerely,
Matijevic
----- Original Message -----
From: "Larry Cain" <l_u_cain@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Monday, August 18, 2003 12:34 PM
Subject: BGP Flapping routes
> Hi Group
>
> Have got a BGP route flapping route problem.
>
> R1 and R2 talking OSPF. R2 and R3 talking eigrp. They are redistributing
> both ways.
> IGP routing tables are correct on R1 and R3 - seeing all networks
including
> remote e0 networks.
> R1 and R2 in same AS 65100. R3 in AS 65200.
> Only Loopbacks put into BGP.
>
>
> |--e0--R1----s0----R2----s1----R3--e0--|
>
> ---------OSPF--------|---------eigrp--------
>
> |------bgp65100------| |--bgp65200--|
>
> The BGP routes from other AS (loopbacks) are in the table for 60s with *>,
> then 60s with only > on both R2 and R3.
> R1 only sees R3 loop when R2 has *> (obviously).
>
> As I say this happens every minute.
> Please help!!!!
>
> Configs below:
>
> All the best
>
> Larry
>
> ROUTER R1
> interface Loopback0
> ip address 1.1.1.1 255.255.255.0
> !
> interface Ethernet0
> ip address 10.1.1.1 255.255.255.0
> !
> interface Serial0
> ip address 10.1.2.1 255.255.255.0
> !
> router ospf 1
> network 1.1.1.0 0.0.0.255 area 0
> network 10.0.0.0 255.0.0.0 area 0
> !
> router bgp 65100
> network 1.1.1.0 mask 255.255.255.0
> neighbor 2.2.2.2 remote-as 65100
> no auto-summary
> !
>
> ROUTER R2
> interface Loopback0
> ip address 2.2.2.2 255.255.255.0
> !
> interface Serial0
> ip address 10.1.2.2 255.255.255.0
> !
> interface Serial1
> ip address 10.1.3.2 255.255.255.0
> !
> router ospf 1
> redistribute eigrp 1 metric 5 subnets
> network 2.2.2.0 0.0.0.255 area 0
> network 10.1.2.0 0.0.0.255 area 0
> !
> router eigrp 1
> redistribute ospf 1 metric 1 1 1 1 1
> network 10.1.3.0 0.0.0.255
> !
> router bgp 65100
> network 2.2.2.0 mask 255.255.255.0
> neighbor 1.1.1.1 remote-as 65100
> neighbor 3.3.3.3 remote-as 65200
> no auto-summary
> !
>
> ROUTER R3
> interface Loopback0
> ip address 3.3.3.3 255.255.255.0
> !
> interface Ethernet0
> ip address 10.1.4.3 255.255.255.0
> !
> interface Serial1
> ip address 10.1.3.3 255.255.255.0
> !
> router eigrp 1
> redistribute ospf 1 metric 1 1 1 1 1
> network 10.1.3.0 0.0.0.255
> network 10.1.4.0 0.0.0.255
> no auto-summary
> !
> router bgp 65200
> network 3.3.3.0 mask 255.255.255.0
> neighbor 2.2.2.2 remote-as 65100
> no auto-summary
> !
>
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