NCS 540: shaper Committed Burst?

[James Jun]

Hello,

I have an NCS540 terminating 10GE to a Metro-E provider.  I need to set 2 Gbps CIR shaping and need to have a small 2ms committed burst (Bc) facing that provider.  But unlike ASR9K, I can't configure burst when doing shaping on NCS 540 and service provider is complaining about excess drops due to high bursts coming from us.

Question:  What is the default Bc/committed burst sent out by NCS when using traffic shaping on output?  and is this burst configurable?  

James

[nkarpysh · Accepted solution]

Hi James,

NCS540 and bigger NCS5500 systems originally had burst fixed to 32K and non-changeable. You should be able to configure it from 7.2.1 on:

RP/0/RP0/CPU0:xrg-301-ncs5508(config-pmap-c)#shape average 10000 bps ?
<1-4294967295> Peak burst size

RP/0/RP0/CPU0:xrg-301-ncs5508-phadke-n(config-pmap-c)#shape aver percent 25 ?
<1-4294967295> Peak burst size

Hope that will help

Niko