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QOS on 6500 switch

jefbowli
Beginner
Beginner

Hello I am trying to guarantee 100mbps for a vlan across a gig link.  I have done some research and found this command for switches

mls qos srr-queue input priority-queue 2 bandwidth 20

However it doesn't seem to work for my 6500.  I know the 6500 uses PFC for QOS but I have no idea how it works.  Can anyone tell me how I can guarantee a vlan 100mbps across a 1gig link?

3 Replies 3

Joseph W. Doherty
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

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The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

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Posting

You might rate-limit all traffic, but from the "special" VLAN to 900 Mbps.  Or, you might map just the "special" VLAN to its own hardware queue and insure that queue will obtain at least 10% of the gig bandwidth.

Yes but how would you rate limit the vlan to 900mbps or guarantee 10% of the bandwidth? I specifically do not know the commands because the mls qos srr-..... doesn't work on the 6500.  Can you give me an example?    

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

6500 series QoS is very dependent on hardware.  You might start here: http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html#wp1101384

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