nanog mailing list archives

RE: Cisco Vip Cards.


From: Randy Bush <randy () psg com>
Date: Wed, 10 Dec 1997 13:50:18 -0800 (PST)

We have seen situations under heavy load where a VIP2-40 with an OC3 
running at 80% and a Fast Ethernet PA running at 50% have resulted in 
severe packet loss and latency. After addressing this with our Cisco reps 
(including the Product Manager and Product Engineer for the 7513/VIP 
family) they acknowledged the problem and stated:

"We do not recommend putting any other PA into a VIP2-40 if an OC3-PA is 
already installed. We have seen adverse performance, in the way of latency 
and packet loss, resulting from such a configuration. Customer's choosing 
to do so, do so at their own risk".

This is not equivalent to

Cisco will not support multiple PA's within a VIP2-40.

My memory is that Cisco does not support use of two 'high speed' PAs in a
single VIP2/40.

I also wonder how you got a POS and anything else in a VIP, as the POS is
secured in and uses both holes.  Was it ATM-Lite or something kinky?

randy


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