3com 4210 PWR 9-Port 3CR17341-91-ME User Manual

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ONFIGURATION

You can configure the switch to trust the 802.1p precedence of the received 
packets. In this case, the priority of the receiving port is not used as the 802.1p 
precedence of the received packet.

To trust the 802.1p precedence of the received packets is determined.

# Configure the switch to trust the 802.1p precedence of the received packets.

<4210> system-view

[4210] priority trust

Refer to section 1.2.3  "Priority Trust Mode" for introduction to priority trust 
mode. 

The priority trust mode to be adopted is determined.

# Configure the switch to trust the DSCP precedence of the received packets.

<4210> system-view

[4210] priority-trust dscp

Table 228   Configure to trust the 802.1p precedence of the received packets

Enter system view

system-view

-

Configure to trust the 
802.1p precedence of the 
received packets

priority trust

Required

By default, for a packet with an 802.1q tag 
header, the priority of the receiving port is 
used as the 802.1p precedence of the 
received packets.

Table 229   Configure the priority trust mode

Enter system view

-

Configure the priority 
trust mode

Required

By default, the switch trusts the 802.1p 
precedence of the received packets. In this 
case, the switch obtains the local 
precedence by looking up the 802.1p 
precedence in the 
802.1p-precedence-to-local-precedence 
mapping table and then assigns the local 
precedence to the packet.