Hi all,
I have a voice gateway and some phones connected to the same switch.
The problem is: The voice gateway doesn't tag his packets for QoS, the phones do it automatically.
Switch-HW: C3750-24TS-S1U
Version: IPBASEK9_12.2(55)SE4
Qos is enabled and rewrite dscp:
Switch#sh mls qos
QoS is enabled
QoS ip packet dscp rewrite is enabled
Configured Qos:
mls qos rewrite ip dscp
mls qos map cos-dscp 0 8 16 24 32 46 48 56
...
and of course some queues...
output reduced
...
Voice Gateway switchport:
!
interface GigabitEthernet1/0/9
switchport access vlan 701
switchport mode access
switchport nonegotiate
speed 100
duplex full
srr-queue bandwidth share 1 10 85 5
priority-queue out
mls qos cos 5
mls qos cos override
spanning-tree portfast
!
Phone switchport:
!
interface GigabitEthernet1/0/20
switchport access vlan 100
switchport mode access
switchport voice vlan 712
srr-queue bandwidth share 1 10 85 5
proirity-queue out
mls qos trust dscp
spanning-tree portfast
!
We need the RTP packets from the voice gateway tagged as EF (Cos 5) and the phones are sending EF for RTP and AF31 for SIP.
With the configuration from above I'm loosing the values from the phones only the voice gateway packets are tagged.
How can I use the override command for the voice gateway in combination with the trust statement on all phone ports?
When I disable the global override with "no mls qos rewrite ip dscp" then I can see tagged packets from the phones but the voice gateway packets are not tagged...
Maybe somebody can point me to the right direction?
Thanks a lot!
Rgds
Andreas
