Errors during QoS on 3750

[paragengg]

Hi,

We are having QoS implemented on 3550 switches.We have decided to replace 3550 with 3750 switch with QoS same as on 3550.

But when I entered the queueing commands of 3550 on 3750 I got errors on following lines....

Errors....

Router(config-if)#mls qos monitor dscp 0 10 16 26 32 46 48 56

Router(config-if)#wrr-queue cos-map 1 2

Router(config-if)#wrr-queue cos-map 2 1 4

Router(config-if)#wrr-queue cos-map 3 6 7

Router(config-if)#wrr-queue cos-map 4 3 5

I got the errors on monitor and wrr-queue . Errors told invalid input detected at "monitor" and "wrr-queue" parts of the commands.I checked the queueing and found that above commands won't work on 3750.

Instead I found following commands on 3750 (instead of wrr-queue I found srr-queue to be workbale on 3750)

Router(config-if)#mls qos srr-queue output cos-map queue 1 2

Router(config-if)#mls qos srr-queue output cos-map queue 2 1 4

Router(config-if)#mls qos srr-queue output cos-map queue 3 6 7

Router(config-if)#mls qos srr-queue output cos-map queue 4 3 5

Are these commands appropriate for queueing??

If not what would be the commands for "mls qos monitor dscp 0 10 16 26 32 46 48 56" and the 4 wrr-queueing commands on 3750??

Can anybody correct me in this regard please???

Thanks & regards,

Parag

[Georg Pauwen]

Hello Parag,

the 3750 uses a specialized WRR feature referred to as shaped round robin (SRR) for congestion management. SRR is supposed to be an enhancement to WRR.

Check this link to the EoL notice for the 3550, and scroll down to 'Table 3. Product Comparisons', there you can see the supported QoS features:

EOS/EOL Announcement Cisco Catalyst 3550 Series Switches

http://www.cisco.com/en/US/products/hw/switches/ps646/prod_eol_notice0900aecd8029f777.html

HTH,

GP

[paragengg]

Thanks for the valuable information sent by you.

Regards,

Parag P. Patil