Voice VLAN QoS
Voice VLAN can propagate the CoS/802.1p and DSCP settings by using LLDP- MED Network policies. The LLDP-MED is set by default to response with the Voice QoS setting if an appliance sends LLDP-MED packets. MED-supported devices should send their voice traffic with the same CoS/802.1p and DSCP values, as received with the LLDP-MED response.
The user can disable the automatic update between Voice VLAN and LLDP-MED and use his own network policies.
Working with the OUI mode, the switch can additionally configure the mapping and remarking (CoS/802.1p) of the voice traffic based on the OUI.
By default, all interfaces are CoS/802.1p trusted. The switch applies the quality of service based on the CoS/802.1p value found in the voice stream. For Telephony OUI voice streams, the user can override the quality of service and optionally remark the 802.1p of the voice streams by specifying the desired CoS/802.1p values and using the remarking option under Telephony OUI.