(Optional) Configuring the 802.1p Priority and DSCP Priority for a Voice VLAN

Context

By default, the 802.1p priority and DSCP priority for a voice VLAN are 6 and 46 respectively. You can dynamically configure 802.1p priority and DSCP priority to plan priorities for different voice services.

The 802.1p priority is indicated by the value in the 3-bit PRI field in each 802.1Q VLAN frame. This field determines the transmission priority for data packets when a switching device is congested.
The DSCP value is indicated by the 6 bits in the Type of Service (ToS) field in the IPv4 packet header. DSCP, as the signaling for DiffServ, is used for QoS guarantee on IP networks. The traffic controller on the network gateway takes actions merely based on the information carried by the 6 bits.

Procedure

Run system-view
The system view is displayed.
Run voice-vlan remark { 8021p 8021p-value | dscp dscp-value } ^*
The 802.1p priority and DSCP priority are configured for a voice VLAN.

By default, the 802.1p priority and DSCP priority for a voice VLAN are 6 and 46 respectively.