BGP config

Answered Question
Jul 1st, 2009

This is home lab and I am just starting playing w/ BGP

I have a frame relay switch configured on router 3

Router 1 can ping router 2

Router 2 can ping router 1

I am trying to configure bgp ..

r2

router bgp 400

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.2 remote-as 600

no auto-summary

r1

router bgp 400

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.1 remote-as 600

no auto-summary

I get this error.

Mar 1 00:50:18.676: %BGP-3-NOTIFICATION: received from neighbor 192.168.10.2 2/2 (peer in wrong AS) 2 bytes 0190

I get this error. I tried to change the AS to different number , I made the AS the same .. the thing that I noticed is that when I do show ip bgp I get router ID 0.0.0.0

Here is it is

R2#sho ip bgp n

BGP neighbor is 192.168.10.2, remote AS 600, external link

BGP version 4, remote router ID 0.0.0.0

BGP state = Active

Last read 00:00:15, hold time is 180, keepalive interval is 60 seconds

Message statistics:

InQ depth is 0

OutQ depth is 0

Sent Rcvd

Opens: 0 0

Notifications: 0 0

Updates: 0 0

Keepalives: 0 0

Route Refresh: 0 0

Total: 0 0

Default minimum time between advertisement runs is 30 seconds

For address family: IPv4 Unicast

BGP table version 1, neighbor version 0

Index 1, Offset 0, Mask 0x2

Sent Rcvd

Prefix activity: ---- ----

Prefixes Current: 0 0

Prefixes Total: 0 0

Implicit Withdraw: 0 0

Explicit Withdraw: 0 0

Used as bestpath: n/a 0

Used as multipath: n/a 0

Outbound Inbound

Local Policy Denied Prefixes: -------- -------

Total: 0 0

Number of NLRIs in the update sent: max 0, min 0

Connections established 0; dropped 0

Last reset never

No active TCP connection

I have this problem too.
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Correct Answer by Jon Marshall about 7 years 5 months ago

r2

router bgp 400

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.2 remote-as 600

no auto-summary

r1

router bgp 400

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.1 remote-as 600

no auto-summary

so is R1 192.168.10.2 and R2 192.168.10.1 ?

Assuming they are and you want to test EBGP then modify config -

r2

router bgp 400

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.2 remote-as 600

no auto-summary

r1

router bgp 600

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.1 remote-as 400

no auto-summary

the problem you have is that you have configured both routers into AS 400 but you have told both routers that the other router is in AS 600, hence the error message.

Jon

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Correct Answer
Jon Marshall Wed, 07/01/2009 - 14:09

r2

router bgp 400

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.2 remote-as 600

no auto-summary

r1

router bgp 400

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.1 remote-as 600

no auto-summary

so is R1 192.168.10.2 and R2 192.168.10.1 ?

Assuming they are and you want to test EBGP then modify config -

r2

router bgp 400

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.2 remote-as 600

no auto-summary

r1

router bgp 600

no synchronization

bgp log-neighbor-changes

neighbor 192.168.10.1 remote-as 400

no auto-summary

the problem you have is that you have configured both routers into AS 400 but you have told both routers that the other router is in AS 600, hence the error message.

Jon

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