[c-nsp] 7200 Line protocol bouncing

Pete Templin petelists at templin.org
Fri Aug 31 00:04:39 EDT 2012

On 8/30/12 10:49 AM, Michael Malitsky wrote:
> I am seeing a weird problem on one of my aggregation routers.  This is a
> 7206VXR, with a PA-MC-T3 and a PA-MC-4T1 cards.  I terminate about 10
> My main question is: can these issues be caused by a router component
> beyond the PA card (i.e. engine or backplane)?  As far as I understand
> the 7200 architecture, L1 and L2 would be terminated on the PA, and
> since I see same problems on multiple PAs, it shouldn't be the router.
> In which case the common point would be the AT&T multiplexer, or
> something beyond it in the telco network.  Am I thinking correctly about
> this?

I'm fairly certain that L2 is handled on the NPE, unless you're using 
the "new" made-for-MLPPP cards (hmmm...they're made to handle MLPPP 
on-PA, maybe that's a clue that L2 is off-PA on other cards).

Disclaimer: it's been a few years since I had my hands dirty with PAs.


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