[nsp] telco SCR/PCR and Cisco kbps

From: Pat Trainor (ptrainor@title14.com)
Date: Fri May 11 2001 - 14:24:26 EDT


List,
        When the telco gives us a SCR and PCR for our OC-3, we need to
convert it to kbps to avoid policing violations at their switch. CCO says:

kbps = (cps * 48 * 8) / 1024

        cells per second
        48 bytes (payload) per ATM cell
        8 bits per byte
        1024 bits/kbit

        ..but there is still a quesiton here concerning the value of 1024
or 1000 as the bits/kbit value.

        Additionally, is the above figure of a full 48 bytes for payload
still valid when the circuit is a PVC? As in:

interface ATM1/0.37 point-to-point
 description 1536 PVC to POP
 bandwidth 1536
 ip address 1.2.3.4 255.255.255.252
 no ip directed-broadcast
 atm pvc 1 1 37 aal5snap 1536 1536 100
!

..with a FR circuit on the other side..

Cisco 3662, ATM card, OC-3, v12.0, ...

TIA!

pat
:)

http://ptrainor.title14.com
"While it's true winning isn't everything, LOSING IS NOTHING!" -Ed Bighead



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