QoS question

Unanswered Question
Apr 27th, 2006
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Guys,


I have 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX card, and I thought it using 1p3q8t techniques, but for some reason when i try to add this configuration to any interface on the card


wrr-queue bandwidth 5 25 70

wrr-queue queue-limit 5 25 40

wrr-queue cos-map 1 1 1

wrr-queue cos-map 2 1 0

wrr-queue cos-map 3 1 4

wrr-queue cos-map 3 2 2

wrr-queue cos-map 3 3 3

wrr-queue cos-map 3 4 6

wrr-queue cos-map 3 5 7

priority-queue cos-map 1 5

mls qos trust dscp

it does not accept some commands, shuch as wrr-queue cos-map 3 x x

And wrr-queue bandwidth 5 25 70


Does this card really supports 1p3q8t?


Thanks in advance..


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Michael Stuckey Thu, 04/27/2006 - 06:36
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What do you see when you do a

"show queueing interface Gix/x" for any interface you have on that card?

I would also like to know what version of IOS you are using?


Mike

Ahmede Thu, 04/27/2006 - 08:07
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The IOS version is fine 12.2.18SXD..

Some commands work fine, such as

wrr-queue cos-map 2 2 3


But when the command wrr-queue cos-map starts with 3 it does not work, so it looks like it's only 2q not 3q, however accoring to Cisco it should be 1p3q8t..



andrew.butterworth Thu, 04/27/2006 - 10:42
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I recently installed some 6509-E's with Sup720's and some WS-X6748-GE-TX modules and I didn't have a problem configuring this:


interface GigabitEthernet3/1

switchport

switchport access vlan 6

no ip address

wrr-queue bandwidth 5 25 70

wrr-queue queue-limit 5 25 40

wrr-queue random-detect min-threshold 3 50 60 70 80 90 100 100 100

wrr-queue random-detect max-threshold 1 100 100 100 100 100 100 100 100

wrr-queue random-detect max-threshold 2 100 100 100 100 100 100 100 100

wrr-queue random-detect max-threshold 3 60 70 80 90 100 100 100 100

wrr-queue cos-map 1 1 1

wrr-queue cos-map 2 1 0

wrr-queue cos-map 3 1 4

wrr-queue cos-map 3 2 2

wrr-queue cos-map 3 3 3

wrr-queue cos-map 3 4 6

wrr-queue cos-map 3 5 7

mls qos trust dscp

!


I was however running 12.2(18)SXF3. The documentation states the WS-X6748-GE-TX has the transmit queue structure 1P3Q8T so it should work. Are you sure it is a 6748 and not a 6548? If you do a 'show interface capabilities' it will show you what the tx queue structure is.


HTH


Andy

Ahmede Thu, 04/27/2006 - 22:53
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Thanks Andrew..


So now, is the queue structure is software dependent or hardware? I mean if I upgraded the IOS will that change the queue structure for the card?

andrew.butterworth Fri, 04/28/2006 - 00:47
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It should be hardware dependant, although I wouldn't rule out an IOS issue. I have briefly looked through the release notes and can't see anything that looks like your problem.

I assume the output from 'show interface capabilities' show the TX queue structure as 1P3Q8T? If so either open a TAC case or just put a later IOS on. 12.2(18)SXD has been deferred anyway so it is advisable to move to 12.2(18)SXD7 (all earlier 12.2(18)SXx releases have software advisories against them).


HTH


Andy

andrew.butterworth Fri, 04/28/2006 - 05:11
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Whoops, I meant to say:


all earlier 12.2(18)SXDx releases have software advisories against them....


Andy

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