srr-queue bandwitdh limit 90

[Adnan Razi Khan]

Is this command rate limit the traffic passing through switch port.

srr-queue bandwitdh limit 90

srr-queue bandwitdh limit <10-90> enter bandwidth limit for interface as percentage.

If I want to pass 9 mbps traffic through a switch port what command i will need or if i need 22 mbps then what value i should use.

[balaji.bandi]

as per the information there is no exact model of the switch or IOS code mentioned, as per label it says cat 2K switch :

10-90 is the % of the interface.

example if it is fast Ethernet 100MB

9MB means 9% of 100MB (neared is 10MB)

reference :

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/swqos.html?bookSearch=true

[Joseph W. Doherty · Accepted solution]

As @balaji.bandi correctly describes it set as a percentage of port's physical bandwidth.

BTW, I recall (?) sometimes there were hardware limitations (platform and/or port specific) such as not supported on every port or percentage wasn't exact.

For exact bandwidth enforcement you might use a policer, but excess is dropped unlike the port queueing excess.

On a FE port, if you wanted 9 Mbps, you run the port at 10 Mbps and use a value of 90.  For 22 Mbps, you run port at 100 Mbps and use a value of 22.  Again, you may find actual bandwidth allowed isn't exactly as specified.

[Adnan Razi Khan]

Switch is 2960x by the way. so for 22 mbps should be as below

srr-queue bandwitdh limit 22

speed 100

For 9Mbps

srr-queue bandwitdh limit 90

speed 10

[Joseph W. Doherty]

Correct.

[Adnan Razi Khan]

Appreciate Balaji and Joseph