priority command is not supported on 6509!?

easynetpresales · ‎08-18-2010

We just upgraged 6509 IOS to 12.2(17r)S4 (s72033-adventerprise_wan-mz.122-33.SXI4a.bin) after that when I deployed service policy on a layer 3 interface I got a message :

priority command is not supported in output direction for this interface
Configuration failed!

All was working fine with old IOS with same config. I am wondering if this IOS dosen't support priority on on output direction?

related config:

rtr-1(config-if)#service-policy output 4Mb2MbQoS-voice&data-access-priority-out
priority command is not supported in output direction for this interface
Configuration failed!
rtr-1(config-if)#end
rtr-1#sh policy-map 4Mb2MbQoS-voice&data-access-priority-out
Policy Map 4Mb2MbQoS-voice&data-access-priority-out
    Class PREC_5
       priority 2000 (kbps)
    Class IPALL
     police cir 4096000 bc 128000 be 128000
       conform-action transmit
       exceed-action drop
       violate-action drop

rtr-1#sh class-map PREC_5
Class Map match-all PREC_5 (id 8)
Match ip precedence 5

Any idea?

Thanks

kyukim · ‎08-18-2010

Hi,

PFC QoS does not support these policy map class commands:

* bandwidth

*priority

*queue-limit

*random-detect

*set qos

-group*service-policy

Please refer to PFC guidelines in the link in the link given below

the priority command that you have configured in the policy map,

and are applying to the interfaces is not supported by the QoS

implemented on the PFC.

Here is a link describing the commands that are unsupported:

http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SR/configuration/guide/qos.html#wp1726726

We do not check for compatibility of a policy-map until the policy is applied to an interface, which is why you could configure it and get the error after the application of the policy map.

You should be able to achieve the limitation of bandwidth, in a similar manner - by using policers. The same link above also describes how to

implement policers using PFC QoS.

KK.

easynetpresales · ‎08-19-2010

Thanks for you inputs KK, But how to explain the previous IOS(12.2(18)SXD7b) supported this features with exact same config?

kyukim · ‎08-19-2010

Hi, Antony.

I have searched and found that you can use priority percent instead of priority on SXI.

Priority xxxx was supported until SXE.

KK.

easynetpresales · ‎08-20-2010

still failed on priority percent:

Policy Map 4Mb2MbQoS-voice&data-access-priority-out
Class PREC_5
priority 50 (%)

rtr-1(config-if)#service-policy out 4Mb2MbQoS-voice&data-access-priority-out
priority command is not supported in output direction for this interface
Configuration failed!

Edison Ortiz · ‎08-20-2010

The command is there to support the implementation of QoS when applied to a WAN module (SIP/SPA or FlexWAN).

It's not supported on regular switchports.

You need to use SRR queueing techniques to apply QoS on regular switchports.

http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoSDesign.html#wp1000574

Regards,

Edison