I am implementing QoS on our MPLS network. Our environment exists of a mix of Cisco 3750 and 3560 switches. The IPT system is Avaya CM with Avaya phones.
The WAN network is a MPLS network.
Ports are configured for access and voice vlan (no trunking), one vlan for voice, one for data (vlan 1 is disabled).
We like to trust dscp settings from the Avaya phone (pretty simple to figure that out, just auto qos voip trust). Testing it I found the Avaya phones leaves any markings on the data vlan untouched.
We are planning on setting the dscp marks for other traffic then Voice on our packetshapers (that are in between the router and te switch uplink to the router). That all works great.
Upon failure of the packetshaper I need all traffic other then voice to be marked as AF21 instead of BE, and I am looking for the easiest way to do this. preferably without using access-lists that hold IP info (as I like to standardize my configs as much as possible).
So, i am looking to trust dscp mapping on the access ports of each switch (autoqos trust dscp, easy) and then have all traffic coming into the data vlan marked with dscp 18 (AF21) before it leaves the switch. All trunks will be configured to trust dscp as well.
With the dat vlan getting dscp marked as AF21, then remarking the traffic on our packetshapers, I would have all marking set correctly before it enters the ploicymap on the CPE of the MPLS provider, and if the Packetshaper fails I would still have the AF21 and Voice markings. that way I try to avoid all data traffic to end up in the BE class upon packetshaper failure.
Can anyone tell me the easiest way to put a default dscp marking on ingress traffic in the data vlan?
Thanks in advance,
Yep, clever bloke Andy, i worked with him on a project in the UK.
I think you're right in what you say. The service-policy should apply all the correct markings and with the "permit ip any any" it is generic enough to be applied throughout your network.
Good luck with the deployment, let me know how it goes.