Hi All,
I wanted to establish what is the preferred QoS configuration for a 2048P switch that connects to Cisco IP Phones
The Cisco phones mark their own voice signaling and voice bearer packets with DCSP values 24 and 46 respectively.
In this scenario, I would apply the configuration globally so that it applies to all interfaces and uplinks.
classofservice trust ip-dscp
classofservice ip-dscp-mapping 24 5
classofservice ip-dscp-mapping 46 5
cos-queue strict 5
or......
classofservice trust dot1p
classofservice dot1p-mapping 3 5
classofservice dot1p-mapping 5 5
cos-queue strict 5
I assume the above configurations will trust/honor the dscp value of the incoming packet and place them in a strict priority queue?
Phone interface configuration
switchport mode general
switchport general pvid 205
switchport general allowed vlan add 205
switchport general allowed vlan add 155 tagged
switchport general allowed vlan remove 1
voice vlan 155
voice vlan auth disable
Many thanks
Jamie