Help needed with LLQ on ATM subinterfaces

[dukenukem]

Hi all,

I am currently trying to implement LLQ on an ATM to FR 2 Mbps connection. My certification is only up to CCNA and then i learn what i need to use. Now i need to learn QoS.

I have been told to use LLQ for prioritizing my voice traffic. I am trying to specify a class, where i will use an extended ACL to specify that from host 10.51.22.241 to host 10.51.12.7 (my IPs for the two PBX systems) i am not using IP Phone, but VOIP Cards iu Siemens PBX. SO i am only interested in the traffic generated by those IPs.

I specify the class-map, then my policy map, but when i try to implement it on the ATM subinterface, it refuses to work, giving me an error message that CBWFQ is not supoprted on ATM subinterface.

I am including the configuration portion of this setup, and i also show you the error messages i received.

Is there a workaround for this, or any other info or mechanism i could use.

Any help will be greatly appreciated.

Thanks,

George

Sample Code and output

----------------------

class-map match-any VOIP-CLASS

match access-group 101

!

!

policy-map VOIP-POLICY

class VOIP-CLASS

priority 300

!

access-list 101 permit ip host 10.51.22.241 host 10.51.12.7

IACSrouter#conf t

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

IACSrouter(config)#exit

IACSrouter#conf t

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

IACSrouter(config)#int atm1/0.49

IACSrouter(config-subif)#service-policy output VOIP-POLICY

CBWFQ : Not supported on subinterfaces

IACSrouter(config-subif)#exit

IACSrouter(config)#int atm 1/0

IACSrouter(config-if)#service-policy output VOIP-POLICY

CBWFQ : Not supported on this interface

IACSrouter(config-if)#

[Aaron Harrison]

Hi

Go to this url:

www.cisco.com/go/srnd

And download the QOS SRND. On page 135 there is a handy example of how to configure QOS on a frame-to-atm link which is probably what you need.

There's also a lot of very useful QoS info throughout the document.

Regards

Aaron

[d.rocco]

George,

You could try to apply "service-policy output" command under the pvc submenu.

For example:

interface ATM1/0

ip address 1.1.1.1 255.255.255.252

pvc 10/140

vbr-nrt 768 256 1

encapsulation aal5snap

service-policy output QoS-Primary-Varone

!

Hi Diego

[pkokhan]

Does your atm subinterface contain line starting with "pvc"? If so go to pvc configuration and try applying the policy there

[tbrumbaugh]

Make sure that you have IP CEF turned on. You can only apply a service policy on the atm interface if it does not have pvc's. If it has pvc's the service policy must be applied there.