> Is it expected behaviour for a TCN to cause a flap on an ASR...We have many
> other POP's with switches
> 4948's/4500's etc(trunk)->ASR+7200's and do not have spanning-tree portfast
> trunk enabled, and
> they do not experience any flaps?
This has nothing todo with the ASR1k at all. Its expected behavior that STP on
the switch will block traffic
when there's a reconvergence, especially when malconfigured (like not using
portfast on
router or host connected links).
Why this doesn't happen on your 7k2 we can't tell, there are a lot of moving
parts that only you know
(for example whether you are using pvst, rapid-pvst or mst and where exactly
the root of those particular
vlans is).
Regards,
Lukas
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