3com WX3000 Manuel D’Utilisation

 

2-3 

You are recommended not to configure both the DHCP snooping and selective Q-in-Q function on the 

device, which may result in the DHCP snooping to function abnormally. 

 

Enabling the VLAN-VPN feature on the current port 

Follow these steps to configure the inner-to-outer tag priority mapping feature: 

Enter system view 

— 

Enter Ethernet port view 

interface interface-type 
interface-number  

— 

Enable the inner-to-outer tag 
priority mapping feature and 
create a priority mapping 

vlan-vpn priority 
old-priority remark 
new-priority 

Required 

By default, the inner-to-outer tag 
priority mapping feature is not enabled.

 

As shown in 

z 

GigabitEthernet 1/0/3 of Switch A provides public network access for PC users and IP phone users. 

PC users belong to VLAN 100 through VLAN 108, and IP phone users belong to VLAN 200 through 

VLAN 230. GigabitEthernet 1/0/5 of Switch A is connected to the public network. The peer end of 

Switch A is Switch B.  

z 

GigabitEthernet 1/0/11 of Switch B is connected to the public network. GigabitEthernet 1/0/12 and 

GigabitEthernet 1/0/13 of Switch B provide network access for PC servers belonging to VLAN 100 

through VLAN 108 and voice gateways (for IP phone users) belonging to VLAN 200 through VLAN 

230 respectively.  

z 

The public network permits packets of VLAN 1000 and VLAN 1200. Apply QoS policies for these 

packets to reserve bandwidth for packets of VLAN 1200. That is, packets of VLAN 1200 have 

higher transmission priority over packets of VLAN 1000.  

z 

Employ the selective QinQ feature on Switch A and Switch B to differentiate traffic of PC users from 

that of IP phone users, for the purpose of using QoS policies to guarantee higher priority for voice 

traffic.  

z 

To reduce broadcast packets in the network, enable the inter-VLAN MAC address replicating 

feature for selective QinQ.