Be careful. Cisco recognizes that VIP2-40's with OC3-PA's and any other PA
co-habitating the VIP card will cause problems (packet loss under peak
conditions). This is due to the huge overhead the SARing takes on the VIP's
CPU. Cisco will not support multiple PA's within a VIP2-40. This is the
primary reason they came out with the VIP2-50.
Cheers,
Steve