"Recursion routing loop" message in debug...

[ashok_boin]

Hello all,

When i am seeing debug of bgp updates and events, i got "recursion error routing loop" for one ip address say 172.16.1.1/30.

I am having two providers, say A & B. With B, asymmetric TX and RX circuits. The IP address 172.16.1.2 is for the asymm TX interface to B.

So, by default, 172.16.1.1/30 is directly connected to me. But i am getting BGP route update for 172.16.0.0/16 network from A, at that time giving the "recursion routing loop" error in my debug messages.

Any solution....?

Thanks in advance...

Regards...

Ashok.

[ivillegas]

To understand the reason behind why recursive routing is failing in tour situation, you need to understand how the routing algorithm works. For any nondirectly-connected route in the routing table whose next hop IP address is not a directly-connected interface of the router, the algorithm looks recursively into the routing table until it finds a directly-connected interface to which it can forward the packets.

Also check the link

http://www.cisco.com/warp/public/459/bgp-rec-routing.html

http://www.cisco.com/warp/public/459/27.html