From: Brennan_Murphy@NAI.com
Date: Tue Dec 10 2002 - 13:01:34 GMT-3
I agree with Chuck that this scenario is not ripe for
seeing the potential effects of QoS.
However, I wanted to add a small comment concerning Sniffer
and similar tools: if you have a strong definition of
what it means to verify QoS, there is no better tool.
If you have a loose version....eh, lots of ways to
do that. Pick any flavor of QoS and if you really
want to visualize and understand it's impact, a protocol
sniffer is the only way to truly get there.
-----Original Message-----
From: Chuck Church
To: Angelo De Guzman; ccielab@groupstudy.com
Sent: 12/10/02 7:24 AM
Subject: Re: Priority Queueing
Angelo,
The queueing methods always work with outbound traffic. Typically
used
with slower interfaces though. Queueing is always working, but like you
said, if the traffic load isn't high, it's really not giving you any
benefit. I don't think you'll see anything useful with Sniffer. The
router
can send the traffic pretty much as soon as it arrives at the outgoing
FE
interface. The queue never fills beyond a couple packets, so no
prioritization ever takes effect. I think you've just got to trust the
'sh
queuexxx' commands. Or else set up back-to-back aux ports, and create a
very slow link. Then you'll see the difference, especially if you run
an
FTP session, and prioritize telnet. That's where it shines.
Chuck Church
CCIE #8776, MCNE, MCSE
----- Original Message -----
From: "Angelo De Guzman" <ghie_pogi@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, December 10, 2002 2:34 AM
Subject: Priority Queueing
> HI To All,
> Wanted to test PQ on my FE interface? I want to
> prioritize FTP. I have a sniffer to see if it is
> working. My questions are the following:
> 1. PQ is applied in what direction?
> 2. Will my queueing work if my bandwidth utilization
> is just 1% ? I remember reading that queueing will
> only work if the utilization is very high.
>
> I'm thinking of putting a traffic generator to
> inject other types of traffic to see if my PQ will
> work. But I don't have a traffic generator. 8-(
>
> Thanks In Advance,
> Angelo De Guzman
>
>
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> http://mailplus.yahoo.com
> .
.
.
This archive was generated by hypermail 2.1.4 : Fri Jan 17 2003 - 17:21:42 GMT-3