[c-nsp] Exceeding the bandwidth points on a 7200

Walter Keen walter.keen at RainierConnect.net
Mon Mar 23 15:09:47 EDT 2009


I think there was a supportable way of adding another module via the IO
slot using a special card in the IO slot that provides you with a PA
slot that doesn't count towards the BW points of the other busses if I
remember correctly.

Justin Shore wrote:
> I have a situation on a 7206VXR w/ a NPE-G1 where I need to add a MC
> DS3 module.  The box already has 4 PA-A3-OC3SMI PAs.  I'd like to add
> a PA-MC-T3 to the box as well.  I know that the OC3 PAs max the
> bandwidth points out for each PCI bus.  However the OC3s are very
> lightly loaded.  Looking back at the graphs I don't see any of the 4
> peaking over 5Mbps.  That may seem surprising considering that there
> are nearly 1000 PVCs configured on those 4 OCs for DSL customers; the
> DSLAMs are very low-end, can only do basic ADSL, and the uplinks
> restrictthe average access speeds to extremely low levels.
>
> So my question is what happens when I exceed the bandwidth points on a
> 7200 where I know that bandwidth from the existing PAs won't ever be a
> problem?  The box as a whole peaks at around 12-15Mbps on its uplinks.
> That G1 is truly bored, averaging below 10% utilization.  I know that
> IOS will bitch about it on boot but it will still continue to work
> won't it?  Any other side effects (other than TAC not liking it if
> they see it until I demonstrate with the graphs that it's not a problem)?
>
> Thanks
>  Justin
>
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