[c-nsp] IS-IS or OSPF as IGP?

[Pete Templin]

Gert Doering wrote:

> OTOH, IS-IS using OSI transport, which means "if your IP stack breaks,
> your routing protocol might still happily assign reachability" (which
> did happen to BT some years ago).

Although there probably are cases where things still go awry, the GSRs 
do have 'external-overload-signaling' which takes down the adjacency if 
dCEF is disabled on the card.  So far, that's saved us every time 
(though thankfully not often).

pt