3Com Switch 7750 Configuration Guide Guide

110 CHAPTER 12: ISOLATE-USER-VLAN CONFIGURATION
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CAUTION: When you use the port hybrid pvid vlan command to configure the
default VLAN ID for a port, you need to specify the vlan-id as a secondary VLAN
for a downlink port and specify the vlan-id an isolate-user-VLAN for an uplink port.
Configuring Mapping
between
isolate-user-VLAN and
Secondary VLAN
You can use the following command to establish the mapping relationship
between an isolate-user-VLAN and a secondary VLAN.
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CAUTION: An isolate-user-VLAN can establish mapping relationship with multiple
secondary VLANs, however, a secondary VLAN can establish mapping relationship
with only one isolate-user-VLAN.
Displaying
Isolate-User-VLAN
Configuration
After the above configurations, you can execute the display command in any view
to view the running status of the isolate-user-VLAN and verify the configuration
effect.
Isolate-User-VLAN
Configuration
Example
Network requirements
■ Switch A connects with Switch B and Switch C. Packets from Switch B and
Switch C to Switch A are without VLAN tag, so that Switch A needs not to
consider the VLAN configurations of the lower layer switches.
■ VLAN 5 on Switch B is an isolate-user-VLAN which includes the uplink port
Ethernet1/0/1 and two secondary VLANs: VLAN 2 and VLAN 3. VLAN 3
includes port Ethernet1/0/2, and VLAN 2 includes port Ethernet1/0/5.
Configure a port as a hybrid
port
port link-type hybrid Required
Add a port to the
isolate-user-VLAN and the
secondary VLAN
port hyrbrid vlan vlan-id
untagged
Required
Configure the default VLAN
ID of a port
port hybrid pvid vlan
vlan-id
Required
Table 57 Add ports to isolate-user-VLAN and secondary VLAN and configure the ports to
untagged packets
Operation Command Description
Tabl e 58 Configure isolate-user-VLAN-to-secondary VLAN mapping
Operation Command Description
Enter system view system-view -
Configure the mapping
relationship between an
isolate-user-VLAN and a
secondary VLAN
isolate-user-vlan vlan-id
secondary vlan-list
Required
Tabl e 59 Display isolate-user-VLAN configuration
Operation Command Description
Display the mapping
relationship between the
isolate-user-VLAN and the
secondary VLAN
display isolate-user-vlan [
vlan-id ]
The display command can be
executed in any view.