Re: Priority vs Policing

 Swap,
I was indeed confusing the terms, makes sense now.

  Thanks

On Wed, Jul 29, 2009 at 2:56 PM, Swap <ccie19804_at_gmail.com> wrote:

> Your understanding is almost correct with a slight confusion on the term
> "rate-limit".
>
> When you say "Traffic in this class will ALWAYS be rate limited to 30Kbps
> congestion or not, conforming traffic will be transmitted and excess
> dropped." - I think you feel that you are getting a guaranteed "minimum"
> bandwidth of 30kbps but in actual it doesn't mean that.
>
> "Rate-limit" instead means that if you cross the policed CIR, your traffic
> will be dropped. So even if voice traffic is under 30kbits/sec, if there is
> congestion, Voice traffic will be dropped.
>
> Priority - you already know what it is..
>
> HTH
>
> Swap
> #19084
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Molomo
> Sent: Wednesday, July 29, 2009 4:30 PM
> To: ccielab_at_groupstudy.com
> Subject: Priority vs Policing
>
> Experts,
> Correct me if I'm wrong on the understanding of Priority and Policing in a
> policy-map , MQC.
>
> policy-map POLICY_MAP
> class VOICE
> priority 30
>
> Traffic in this class will be gauranteed maximum 30Kbps bandwidth and will
> always be send first. When there is no congestion excess traffic will be
> forwared but not prioritized and during congestion excess traffic will de
> dropped.
>
> policy-map POLICY_MAP
> class VOICE
> police 30000 1000 conform-action transmit exceed-action drop -
>
> Traffic in this class will ALWAYS be rate limited to 30Kbps congestion or
> not, conforming traffic will be transmitted and excess dropped.
>
> Now if my understanding is correct why is it that in most
> implementations voice traffice is used with priority (LLQ). IMO it will
> make
> more sense to use policing for voice class because ideally you would
> always want voice traffic strict policed- congestion or no congestion.
>
> Or am I missing something?
>
>
> Rgds,
> Molomo
>
>
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Received on Wed Jul 29 2009 - 15:12:51 ART