Hi,

Am I wrong or the CBWFQ does allow you to strict priority a traffic class
using the keyword 'priority' ?

Thanks,

Alaerte






"\"\"B.J. Wilson\"\"" @groupstudy.com em
30/10/2002 09:07:36

Favor responder a "\"\"B.J. Wilson\"\"" 

Enviado Por:      [EMAIL PROTECTED]


Para:  [EMAIL PROTECTED]
cc:

Assunto:    Re: Queuing question(s) again ! [7:56519]


Hi Manish -

Regarding your questions about queuing:

> Should I take it to mean that all queuing
> schemes such is RTP and LLQ, which
> use a variant of WFQ as their basis have
>
> (1) 'modified' one queue to be act as a HIGH
> PQ, or if you like, System
> Queue 0 in custom queuing, in that it has to be
> drained first, before the
> other queues get serviced or

Yes, I believe this to be true.  Keep in mind the "evolution" of queuing
mechanisms: after WFQ came CBWFQ and PQ simultaneously (I think - someone
correct my history if I'm mistaken).  PQ is *too* strict, and not granular
enough.  CBWFQ is too loose, and cannot guarantee that a certain type of
traffic will *always* get through.  Enter IP RTP Priority, which states
that
RTP packets (usually voice) will *always* go through, and any other traffic
type will be handled in a WFQ fashion.  LLQ opens up the possibility of
giving
priority to other traffic types (not necessarily voice traffic), and then
handling everything else in a bandwidth-based WFQ fashion.

> (2) is it once again, a case of one queue
> having a higher weight which means
> more data gets sent, (but not all data), at
> each pass.

This is pure CBWFQ that you're describing here.

HTH,

BJ




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