From: Diment, Andrew (adiment@xxxxxxxxx)
Date: Wed Jul 24 2002 - 12:48:30 GMT-3
What is the difference among traffic-shape rate in frame-relay main
interface, frame-relay traffic-rate and frame-relay cir ,bc,be etc. in
map-class frame-relay beda.
"Traffic-shape rate" is generic traffic shaping and can be put on any
interface.
"Frame-relay traffic-rate" is not as granular as doing frame-relay
cir,bc,be etc.
In frame-relay traffic-rate you can't specify "be" for example.
what is the difference when i put custom-queue-list in frame-relay main
interface and in map-class frame-relay beda.
When it's put on the main interface all sub-interfaces take on those
properties.
Or you can put different custom-queue-lists on different sub-interfaces
by applying
the list to a map-class. Of course this just determines how the
packets will be put
into the physical transmit buffer of the real serial interface.
when i should use cbwfq and when custom queue for 50% bandwidth for certain
traffic.
In custom queuing you divide bandwidth by how many bytes are
transmitted out of each
queue. It is a very rough estimate that real depends on the size of
the packets. In
cbwfq the bandwidth statement is the new way of doing it and is more
accurate.
Andy
-----Original Message-----
From: beda jain [mailto:bpjain@cisco.com]
Sent: Tuesday, July 23, 2002 5:06 PM
To: Diment, Andrew; 'ccielab@groupstudy.com'
Subject: RE: QOS doubt
Hi Diment,
Thanks a lot.
i have some more question.
What is the difference among traffic-shape rate in frame-relay main
interface, frame-relay traffic-rate and frame-relay cir ,bc,be etc. in
map-class frame-relay beda.
what is the difference when i put custom-queue-list in frame-relay main
interface and in map-class frame-relay beda.
when i should use cbwfq and when custom queue for 50% bandwidth for certain
trafic.
Thanks again.
I see your fundamental is very clear. you are great.
When i should use At 03:33 PM 7/23/2002 -0500, Diment, Andrew wrote:
>I'll take a crack at this.
>
>
>Does CBWFQ work in frame-relay sub interface.
> Only in upper releases of 12.2 IOS
>
>When i should use queuing in the physical interface or sub interface
> Q'ing is on main interface only, sub-if's won't take a queuing type
> of config command. Traffic shaping map applied to the main interface
> will apply the same map to all sub-interfaces. You can apply
different
> ones to different sub-interfaces if needed.
>
>and when in the frame-relay class.
> When you want to put a "service-policy' on a sub-int and it is not
> 12.2.x IOS
>
>when i should use ip rsvp bandwidth and when frame-relay voice bandwidth.
> frame-relay voice bandwidth is for VOfr. IP RTP priority is for
VOip.
>RSVP is
> configured on all routers and is not really a queue/buffer
prioritizes
>like cbwfq or
> ip rtp priority queuing
>
>when i should use frame-relay ip rtp priority and when priority in cbwfq.
> These are close to the same, cbwfq will prioritize odd and even port
>numbers where
> rtp priority only does even port numbers. CBWFQ is also more
granular
>since you can
> prioritize any traffic and not just RTP traffic (which is UDP only)
>
>whether i should put exact bandwidth or little more in priority (cbwfq),
>example in place of 50 , i want to put 52. is this ok.
> This is more a design question...answer would be "depends"
>
>In custom queue i should use 0 as first queue or 1.
> I don't know, try it.
>
>when we are configuring queuing in frame-relay, do we need to configure
>frame-relay traffic-shaping also or not.
> No, queuing and traffic shaping are 2 different things.
>
>Andy
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