[cisco-voip] PER CALL BANDWIDTH CONSUMPTION OVER ETHERNET+802.1Q

[Anthony Holloway]

After reading the Medianet document, I'm certain they are just giving you
an example, not a definitive answer nor the best practice.  While 128kbps
does police the port to a single g711ulaw call, it also allows for a little
wiggle room, which I like.  If you are looking for the absolute minimum
bandwidth needed for a g711ulaw call, you could go lower than 128kbps, but
you wouldn't gain anything.  Don't forget that the BIB of the phone could
cause more than a single call's worth of RTP to ingress the switch port, in
which case your 128kbps would not be enough and you would have issues with
things such as network recording or silent monitoring.

On Wed, Apr 15, 2015 at 9:19 AM abbas Wali <abbaseo at gmail.com> wrote:

> medianet is
>
> http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html
>
> Vik's post
> http://www.collabcert.com/blog/qos/how-much-bandwidth-does-1-call-consume/
>
>
> On 15 April 2015 at 13:44, Anthony Holloway <
> avholloway+cisco-voip at gmail.com> wrote:
>
>> Can you link us to the sources in question? I personally need a little
>> more context to go with your question.
>>
>> In general, policing a single g711ulaw call is around 93kbps, and
>> rounding it to 100kbps still achieves the goal of policing a single call.
>> And yes, a class based policer would police media and signaling separately.
>>
>> Also, I saw something on medianet at last year Cisco Live, but other than
>> that, I'm clueless about medianet. I can't say if and how things changed
>> once medianet came in to the picture. I'm sure Vik wasn't considering that
>> either, based on the fact that he teaches CCIE Collab boot camps, and
>> medianet is not a part of the blueprint.
>> On Wed, Apr 15, 2015 at 4:22 AM abbas Wali <abbaseo at gmail.com> wrote:
>>
>>> hi all,
>>>
>>> Vik Malhi posted that for a successful g711 call
>>>
>>> HQSW(config-pmap-c)#police 90500 8000 exc drop ! 0 packet loss
>>>
>>> now, as per Ciso medianet 4
>>>
>>> The VoIP and signaling traffic from the VVLAN can be policed to drop at 128 kbps and 32 kbps, respectively (as any excessive traffic matching this criteria would be indicative of network abuse)
>>>
>>> Question is 128 kbps supports 1 single voice stream of g711 OR if you go with Vik, you need to multiply 90500 with the number of calls you need on that port. I will assume that the sig is classified differently and handled by diff policer on that port.
>>>
>>>
>>> many thanks
>>>
>>>
>>> --
>>> *Abbas Wali*
>>>  _______________________________________________
>>> cisco-voip mailing list
>>> cisco-voip at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>>
>>
>
>
> --
> *Abbas Wali*
>
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