BGP problem

[jawwalit]

dir Sir:

i have two routers , and i enable the bgp using ibgp (internal) and the both are connected by ethernet, and have the following configuration:

Router 1:

router bgp XXX

no synchronization

bgp log-neighbor-changes

neighbor 192.168.209.1 remote-as XXX

neighbor 192.168.209.1 ebgp-multihop 10

neighbor 192.168.209.1 update-source FastEthernet0/0

no auto-summary

Router 2:

router bgp XXX

no synchronization

bgp log-neighbor-changes

neighbor 192.168.209.5 remote-as XXX

neighbor 192.168.209.5 ebgp-multihop 10

neighbor 192.168.209.5 update-source vlan 1

My point the Tcp connection doesnot connect (idle- active- idle) it give me always the following message:

%BGP-3-NOTIFICATION: received from neighbor 192.168.209.1 2/3 (BGP identifier wrong) 4 bytes D46A4C16

can u help me to solve this problem.

thanks

[Georg Pauwen]

Hello,

sounds like on Router 1, you are specifying your neighbor 192.168.209.1 with the wrong AS. You say that you are configuring iBGP, in that case, your configuration would not need the ebgp-multihop. So for iBGP to work, your configuration should look like this (the AS number is arbitrary and probably different from what you have actually configured):

Router 1:

router bgp 65001

no synchronization

bgp log-neighbor-changes

neighbor 192.168.209.1 remote-as 65001

neighbor 192.168.209.1 update-source FastEthernet0/0

no auto-summary

Router 2:

router bgp 65001

no synchronization

bgp log-neighbor-changes

neighbor 192.168.209.5 remote-as 65001

neighbor 192.168.209.5 update-source vlan 1

HTH,

GP

[jawwalit]

i remove the command but dosent work

[Harold Ritter]

It looks like the two routers have the same router-id (212.106.76.16). Please make sure that your loopback interface IP address is different on the two routers.

Hope this helps,

[Harold Ritter]

As Stig mentioned in his posting the router-id is 212.106.76.22 not 202.106.76.16 as stated in my previous posting. I can't do hex maths before my first coffee ;o)

[jawwalit]

have a nice day , thank u

[johansens]

You are using the same BGP Router ID on both BGP routers. The router ID is the highest IP address on the router, with preference given to loopback addresses. It can also be set manually using the bgp router-id command.

According to your errormessage, your router ID is D46A4C16 which translates into 212.106.76.22. Check this IP-address on your two routers. If you need to use this on both routers, use the "bgp router-id.." command under the "router bgp xxx" configuration to manually set a unique ID as you wish on both routers.

See this link for more information about your error message:

http://www.ciscotaccc.com/iprout/showcase?case=K18512756

Did it help?

[jawwalit]

thank you , it is work now