Maipu Administration Guide

Configure Priority Mapping Example

Network Requirements

There are two servers in the network, that is, Video server and Data server.
The DSCP value in the video traffic packet is 34 and the DSCP value in the data traffic packet is 38.
Configure the priority mapping function, realizing that the 802.1p priority of the video traffic packet is 5 and the 802.1p priority of the data traffic packet is 1.

Network Topology

Networking of configuring the priority mapping

Figure 1-3 Networking of configuring the priority mapping

Configuration Steps

Step 1: Configure the link type of the VLAN and port on Device.

#Create VLAN2.

Device#configure terminal
Device(config)#vlan 2
Device(config-vlan2)#exit

#Configure the link type of port gigabitethernet0/1 as Access and permit the services of VLAN2 to pass.

Device(config)#interface gigabitethernet 0/1
Device(config-if-gigabitethernet0/1)#switchport mode access
Device(config-if-gigabitethernet0/1)#switchport access vlan 2

#Configure the link type of port gigabitethernet0/2 as Trunk and permit the services of VLAN2 to pass.

Device(config-if-gigabitethernet0/1)#interface gigabitethernet 0/2
Device(config-if-gigabitethernet0/2)#switchport mode trunk
Device(config-if-gigabitethernet0/2)#switchport trunk allowed vlan add 2
Device(config-if-gigabitethernet0/2)#exit

Step 2: Configure the priority mapping function.

#Configure the priority mapping function globally, map the packet with DSCP value 34 to queue 2 and map the packet with DSCP value 38 to queue 3.

Device(config)#qos map-table ingress a
Device(config-maptable-ingress)#dscp-lp 34 to 2
Device(config-if-gigabitethernet0/1)# dscp-lp 38 to 3

#Globally configure the priority mapping function, map the 802.1p priority of the packet in queue 2 to 5, and map the 802.1p priority of the packet in queue 3 to 1.

Device(config)#qos map-table egress b
Device(config-maptable-egress)#lp-dot1p 2 to 5
Device(config- maptable-egress)# lp-dot1p 3 to 1

# On the port, bind the profile and configure trust.

Device(config)#interface gigabitethernet 0/1
Device(config-if-gigabitethernet0/1)# map-table a ingress
Device(config-if-gigabitethernet0/1)#qos map-table trust dscp ingress
Device(config)#interface gigabitethernet 0/2
Device(config-if-gigabitethernet0/2)# map-table b egress
Device(config-if-gigabitethernet0/2)#qos map-table trust dot1p egress

Step 3: Check the result.

#After the video traffic and data traffic are processed by Device, the 802.1p priority of the video traffic packet sent out from port gigabitethernet0/2 is 5 and the 802.1p priority of the data traffic packet is 1.