[c-nsp] Cisco and ATM VC => Limit PCR

Rich Davies rich.davies at gmail.com
Thu Feb 4 12:00:04 EST 2016


Based on your configuration it appears you are doing an ATM service type of
VBR-NRT (Variable Bit Rate, Non Real Time).    Based on VBR-NRT you can use
the following ATM traffic parameters:



So looks like you can set the PCR to 4830 as your operator has requested:

interface ATM1/0.937 point-to-point
 pvc LINKONE 1/937 l2transport
  vbr-nrt 4835 48735 1

You currently have a peak cell rate and average cell rate set to 2048 and
burst cell size set to 1.   I do not think you can set the CDV/MCR based on
VBR-NRT service type (those are CBR I believe).   You may want to increase
your burst rate from 1 to a higher value based on your bandwidth on the


On Thu, Feb 4, 2016 at 3:51 AM, Olivier CALVANO <o.calvano at gmail.com> wrote:

> Hi
> i request a small help on a Cisco with ATM cards.
> we have a interface:
> interface ATM1/0.937 point-to-point
>  mtu 1600
>  atm route-bridged ip
>  no atm enable-ilmi-trap
>  pvc LINKONE 1/937 l2transport
>   vbr-nrt 2048 2048 1
>   encapsulation aal5snap
>   xconnect 2043 pw-class Ethernet
> My problems, this link is satured.
> My Operator said:
>  actually PCR 4835 cel/s and CDV 223 us
> please limite at PCR 4830 cel/s and CDV 224us and MCR at 170 cel/s
> anyone know where i can create a "class" and put into my interface a
> limitation ?
> (a sample of configuration)
> regards
> Olivier
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

More information about the cisco-nsp mailing list