Here is my thought process, and reason I suggested checking packets on the server connected interface. - Client send packet with value of 0 - Interface receives this packet and mirrors it to the destination port. - PCAP shows receive packets as value 0 - After packet has been mirrored, the switch then sees it matches the assigned policy and changes the value to 10. - Switch forwards packets out server interface.  At this point the packet being transmitted out the server facing port should be observed with the DSCP value of 10. We can confirm this by setting up a session session on this interface. - Unless the server is set to send packets with a different priority, or maintain the priority, the server is probably sending packets with value 0 - Switch receives packets from server that are returning to client.  - Switch has no IN policy for this interface, and DSCP value of 0 is maintained. - Switch forwards packet out client facing interface. This results in PCAP showing DSCP value of 0 for in and out traffic on the client facing interface.
Dear All, I am attempting to configure a traffic policy on a Dell 2048P switch. The aim of the policy is to change the DSCP value of traffic going to a specific server from DSCP value 0 to 10. Interface 3/0/3 is the PC that is connecting to server 10.51.53.16.  I can see packets incrementing from the show output on the switch, but when I perform a wireshark trace by monitoring the PC port, the DSCP value remains at 0 instead of 10.  Configuration as follows:  class-map match-all class_ccx ipv4 match dstip 10.51.53.16 255.255.255.0 exit  policy-map test_policy in class class_ccx mark ip-dscp 10 show running-config interface gigabitethernet 3/0/3 service-policy in test_policy   Interface...................................... Gi3/0/3 Direction...................................... In Operational Status............................. Up Policy Name.................................... test_policy Class Name..................................... class_ccx In Offered Packets............................. 573 In Discarded Packets........................... 0 show class-map class_ccx Class Name..................................... class_ccx Class Type..................................... All Class Layer3 Protocol.......................... ipv4       Match Criteria                         Values ---------------------------- ------------------------------------- Destination IP Address       10.51.53.16 (255.255.255.0) Class Name..................................... class_ccxMark IP DSCP................................... 10(af11) As mentioned, I cannot see any evidence that the DSCP value has been changed for traffic going to my server. Many Thanks Jamie
Traffic Policy - Marking DSCP value