All; I'm looking at the QoS section 5.2 of Lab3 from the OWLE class (for those of you who took it and have the workbook) And Vik if you read this, the IPExpert Solution guide you gave us does NOT have the answer to this question.
Here is the scenario: Ensure that all SCCP traffic passing through the CAT 3750 is marked to DSCP AF31. You can't trust the devices attached to the switchports to do this. Now, I went through CUCM and CUC and change SCCP related stuff to AF31. However, when I looked at the traffic in and out of the ports, the phone shows it sends AF31 packets, but CUCM is still seemed to be sending "all" control messages on CS3; meaning I don't see a hint of AF31 traffic. BTW you can use the command, "show mls qos interface fa0/5 statistics" to see what dscp and cos packets are coming in and out of that particular interface. So I tried to use an ip access-list, class-map, and policy-map to classify the traffic and remark it to AF31, and applied the service policy to incoming traffic on the phone ports and Server ports. But no go. Config on the switch as follows ***** Begin ip access-list extended SCCP-CONTROL permit tcp any any range 2000 2002 permit tcp any eq 2000 any class-map match-any SCCP-SIG match access-group name SCCP-CONTROL policy-map REMARK-SCCP class SCCP-SIG set dscp af31 interface FastEthernet0/6 description *** HQ Phone 7965 *** switchport access vlan 10 switchport mode access switchport voice vlan 20 spanning-tree portfast service-policy input REMARK-SCCP ***** End Then I used Wireshark on back of the phone, I found that messages from CUCM to the phone actually has DSCP set to 0. While the phone has the AF31 config from the Enterprise Parameters. It is using the right port 2000 (src or dest I got that covered in ip access list). I've restarted the CallManager Services, rebooted the switch, disabled / reenabled mls qos; and I can't get it work. I don't see any traffic being classified or remarked as I have configured the policy - a "show policy-map interface" shows no matches on the traffic. What gives? Scratching my head..... Maybe its my gear. I'm using WS-C3560-24PS-E on 12.2(50)SE1 Wondering if anyone can answer or comment on this? Maybe I should just abandone the 3 points. Thanks
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