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QoS question

We have a Cisco router running this version of IOS

rsp-jk8o3sv-mz.122-17a.bin

We are implementing QoS, the QoS includes LLQ and Random-detect, DCEF is already enabled on the router, the router accepted all the QoS configuration, but we tried to implement the interface command ?service-policy output test?, it went fine with some interfaces, however other interfaces did not take the command giving us the error message ?service-policy is supported only on VIP interfaces with DCEF enabled?,again DCEF is enabled on the router.

The only difference I can spot between the interface that accepted the command and the one that did not accept was the ?PPP? on the one that did not accept the command.

Router1(config)#interface serial 2/1/7

Router1(config-if)#service-policy output test

service-policy is supported only on VIP interfaces with DCEF enabled

!

Here?s the configuration of the interface that did not take the command

interface Serial2/1/7

bandwidth 2048

no ip address

encapsulation ppp

no ip route-cache

ip ospf message-digest-key 1 md5 xxxxxxxxxxxx

no ip mroute-cache

no fair-queue

serial restart-delay 0

ppp multilink

multilink-group 100

end

I did try to implement the interface command to the multilink interface but we got the same error

Enter configuration commands, one per line. End with CNTL/Z.

Router1(config)#interface Multilink100

Router1(config-if)#service-policy output test

service-policy is supported only on VIP interfaces with DCEF enabled

Any idea why these interfaces did not accept the command?

Thanks in advance

1 REPLY
Blue

Re: QoS question

as of 12.1(5)T, only dCEF is supported on VIP interfaces.

ip cef distributed - enables dCEF globally

ip route-cache cef - enables dCEF on an interface

see this link for more info:

http://www.cisco.com/en/US/tech/tk39/tk824/technologies_tech_note09186a0080094978.shtml#topic3

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