mailing list archives
Single carrier multi-circuit asynchronous routing issue
From: Aaron Millisor <aaron.millisor () bright net>
Date: Wed, 07 Jan 2009 14:53:25 -0500
I am curious to know if anyone has else has hit a problem like the one I
am running into right now.
I have two DS3 DIA's in my router, terminating on two separate routers
at Sprint. We peer with BGP and I am prepending certain of my prefixes
to balance the traffic load.
src __________ dst
18.104.22.168 |----|- ds3 #1 -| sprint 1 |--( ) 22.214.171.124
------- |me | ( internet ) -------
| | ( )
| | __________ ( )
|----|- ds3 #2 -| sprint 2 |--( )
If I were to prepend the network 126.96.36.199 to come in on 'sprint 1', but
have a route to 188.8.131.52 via 'sprint 2' so that traffic comes in on one
circuit but returns on the other, routing is broken. If I change my
route so that packets directed to 184.108.40.206 return on the same circuit
that the traffic is received on, everything works fine.
Has anyone else run into an issue like this before?
- Single carrier multi-circuit asynchronous routing issue Aaron Millisor (Jan 07)