Q: What is QOS trust mode and how to configure it in Mobility access switch?
A: Previously on ArubaOS 7.0, only one mode of QoS trust (L2 + L3 trust) was supported Starting ArubaOS 7.1, more granular QoS trust modes are supported:
- Auto - L2 + L3 trust
- Dot1p - Trust only 802.1p bits
- Dscp - Trust only DSCP bits of the IP header
- None - Do not trust any incoming 802.1p/DSCP. Will be queued to Queue 0
QoS Trust Mode - Configuration
Interface can be configured to trust mode by following CLI
(ArubaS3500) (config) #interface gigabitethernet 0/0/21
(ArubaS3500) (gigabitethernet "0/0/21") #qos trust <auto | dot1p | dscp | none>
QoS Trust configuration can be verified using following CLI command:
(ArubaS3500) #show interface-config gigabitethernet 0/0/21
gigabitethernet "0/0/21"
------------------------
Parameter Value
--------- -----
...
Interface QoS Profile N/A
...
Interface QoS Trust Mode DSCP
...
note: If qos trust mode is auto, and incoming packet is marked with both 802.1p and DSCP bits, the packet will be classified based on DSCP
