[c-nsp] %TUN-5-RECURDOWN error

[Nick Kraal]

We are trying to build a virtual peering tunnel link between two 
providers through a shared upstream provider.This is to exchange
CustA and CustB prefixes only between ISPA and ISPB. The /30 tunnel IP 
address is provided by ISPA.

               BigBadInternet
                     |
CustA-ISPA----TransitProvider---ISPB-CustB
                     |
                 OtherISPs

Tunnel interface is up. But when BGP is run, we get a '%TUN-5-RECURDOWN' 
error and the tunnel interface is shutdown. Tried placing the tunnel WAN 
/30 static routes into the tunnel on both sides. Sort of understand what 
is going on here, but not too sure how to fix this.

Any advice would be great. Thanks in advance.

-nick/