From: Jongsoo.Kim@Intelsat.com
Date: Sun Mar 13 2005 - 13:53:45 GMT-3
I used to spend a lot of time to figure this out.
I kind of conclude that we have to pay attnetion on wording.
Flow-based WRED is only possible for class-default.
What is the difference between 1)Flow-based WRED and 2)WRED for HTTP?
Flow-based WRED means WRED for "many flows(classes)", which implies a
class-default in CBWFQ. Class-default can have many classes that not belong
to specificall defined class in policy map.
WRED for HTTP has basically only one flow. So bandwidth and random-detect
are needed. I believe the default is tail-drop(queue-limit) and bandwidth
should be used so that random-drop can be kicked in when traffic exceeds
bandwidth
Policy-map ccie
Class HTTP
bandwith 2000
random-detect
Class Telent
bandwidth 1000
random-detect
class class-default
fair-queue
random-detect
Regards
Jongsoo
-----Original Message-----
From: k c [mailto:jwongccie@yahoo.com.hk]
Sent: Sunday, March 13, 2005 11:06 AM
To: ccielab@groupstudy.com
Subject: Re: flow based wred
Hi Group,
I want to ask this question again. I have seen several times that many
people interest in this question but haven't got an answer. The question
like "Use WRED for HTTP traffic, allow 2M, for telnet allow 1M. Other
traffic use Flow-based WRED". Is it possible to configure flow based wred
using MQC? From Cisco's site, in all samples describing FRED, the command is
typed under interface menu. No example is given using MQC. Any tricky
behind. If the interface is Frame-relay, it seems it is possible to define a
service-policy under map-class and assign this map-class to FR interface
with FRED configured.
Regards.
"Gopal@Yahoo" <gnaganab@yahoo.com> wrote:
Did you verify it working?
As far as i know:-
I don't think class based flow based WRED is possible.
Also, in your interface config, random detect and
map-class/service-policy won't go together.
Check with people whoever asking you if they meant WFQ
based WRED. If yes, then apply wred and fair queu to
the class concerned.
My 2c.
Cheers,
Gopal
--- ccie-cs@comcast.net wrote:
> Hi, all,
> If I am asked to use regular WRED for telnet
> traffic and flow based WRED for the other
> non-adaptive UDP traffic, how can i configure that
> using MQC? Because MQC does not support flow-based
> WRED, so i am thinking to configure a policy-map to
> random drop TCP packets, and at the same time
> configure flow-basd WRED at the interface level, but
> has not clue how to verify this configuration, can
> anyone please help?
> interface s2/0
> encap frame-relay
> ip address 101.1.1.1 255.255.255.255
> random-detect
> random-detect flow
> frame-relay class tcp-wred
> map-clas frame-relay tcp-wred
> service-policy output tcp
> policy-map tcp
> class tcp-traffic
> random-detect
> class class-default
> fair-queue
> class-map tcp
> match protocol ftp
> Thanks,
> Mike
>
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