[c-nsp] BFD and IPv6 on 6500?

Daniel Verlouw daniel at bit.nl
Tue Oct 5 08:17:45 EDT 2010


Hi,

On Mon, 2010-10-04 at 17:52 +0200, Gert Doering wrote:
> (NB: what about BFD for ISIS - how will that behave in a dual-stack
> environment?  The feature is called "IS-IS support for BFD over IPv4",
> but I assume that an IPv4-BFD-triggered outage will kill the whole
> IS-IS adjacency, thus taking down IPv4 and IPv6 forwarding on that 
> link.  This *might* be a reason to change IPv6 IGP to ISIS...)

yes, an IPv4 BFD down event will tear down the whole adjacency. Note
that when running MT, you'll also have to enable IS-IS IPv4 topology on
the interface the same time, otherwise IS-IS won't register as a client
to BFD.

   --Daniel.



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