Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

link bandwidth and WRED on GSR

hi ALL,

      random-detect command as below

random-detect precedence 3 1498 packets 9690 packets 1.

    i have a router ,customer request as below:

    important business data :   ip precedence 4  bandwidth 30%

    Wred request:if traffic reach to 80% bandwidth of link c , drop  traffic until 100% drop all

    internet traffic:                    ip precedence 1  bandwisth  20%

    Wred request:if taffic reach to 30% bandwidth of link, drop traffic until 100% drop all


     how can i config wred on gsr to complete customer request, link bandwidth is 2.5G

     how can i determine queue size of wred!

    thank you!


Super Bronze

link bandwidth and WRED on GSR


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.


Unfamilar with GSR, but if its WRED works like other Cisco device WRED, WRED doesn't engage until you hit 100% link bandwidth, i.e. packets need to enqueue.  When it does, it would be extremely difficult to configure WRED drops on current percentage utilization.

To drop all traffic of certain types at certain bandwidth utilization could be accomplished with a policer, but these seems rather severe unless the link is congested.

If traffic was flowing on on one port and egress on another, you might "clock" the different traffic type usages with a policer and then use a single WRED to drop over rate traffic when egress is congested.

CreatePlease to create content