Is CCM server capable of QoS marking signalization packets that sends to phones?
When snnifing traffic, it`s visible that packets going from my phone to CCM are marked (ToS 3), but packets going from CCM to phone are not marked (default 0).
Be default CCM does mark its signalling packets. Take a look at the following link for confirmation.
This can be changed in CCM admin -> System -> Enterprise Parameters. You might check there to see if the values have been changed. Also, make sure that these packets are not being remarked somewhere else in the network.
Hope this helps. If so, please rate the post.
thanks for your answers.
In Ent. Par. Conf. DSCP marking of packets is set, and this is QoS configuration of switch that CCM is attached to (WS-C4506):
qos map dscp 24 25 26 27 28 29 30 31 to tx-queue 4
qos map dscp 32 33 34 35 36 37 38 39 to tx-queue 4
qos map cos 3 to dscp 26
qos map cos 5 to dscp 46
switchport access vlan 10
switchport mode access
switchport voice vlan 10
service-policy output autoqos-voip-policy
qos trust cos
auto qos voip trust
shape percent 33
Is there something that must be changed in cofiguration?
Yes - as I mentioned before, your CCM port must be configured to trust DSCP 'qos trust dscp' not trust COS.
COS is a marking in the dot1q or ISL header of a packet - as the CallManager is not on a trunked port like phones are, it can NOT mark COS on packets.
Also you wouldn't normally have 'switchport voice vlan' on the port to CallManager as it is an access port in that VLAN.
Please take the time to rate helpful posts...
Users browsing this forum: No registered users and 1 guest