WFQ is usually used on serial links 2mb or slower. I do not believe it is
recommended for links faster than 2mb. ATM has it's own ways of dealing
with congestion.
GE Capital
Information Technology Solutions
**************************************************
Robert Kinnion robert.kinnion@xxxxxxxxxxxxx
Systems Engineer Phone 954-926-1215
One Oakwood Plaza Fax 954-920-0224
Suite 120
Hollywood, FL 33020
-----Original Message-----
From: buster [mailto:batrax@xxxxxxxxxxx]
Sent: Monday, May 01, 2000 2:13 PM
To: cisco@xxxxxxxxxxxxxx
Subject: Interesting queueing Question.....
Although this question might be very "stupid" to some, i would
really appreciate if someone can give a real "technical" answer to the
following.
During our VOIP testing, our core engineers stated that all our
interfaces should have fair-queueing enabled, hence they can selectively
queue certain packets with amended TOS fields. I completely understand
that situation for WAN links, where congestion is a real concern.
Take for example you have a OC-12 link. Moreover suppose you never
max this connection out, infact, suppose you stay well under its
theoretical limit.
My question comes with the above assumptions in place. Why do you need
to enable fair-queueing, or any queuing on a link which will never get
exceeded ?
The core engineers stated that , although the interface doesn't get
congested, the router cannot simply process the packets quick enough to
have an empty output buffer. Therefore, they will always be an output
buffer which will need to get queued. That's when fair-queueing comes
into play.
Is this true?, will queuing be used on links that never get
congested. Laura Chappels ACRC book states that, if no congestion is
present, there is no need for queuing.
Moreover is ethernet, fiber links using a serial method for
transfer. That is, do bits travel one after another ? or in parallel?
I would greatly appreciate anyone's feedback to my questions,
thanks..
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