3Com WX4400 3CRWX440095A WX1200, 3CRWXR10095A, 3CRWX120695A WXR100 Viewing and Configuring VLANs

Viewing and Configuring VLANs 209

Changing VLAN A port or port group can be in one or more VLANs. To be in multiple Membership VLANs, the port or group must have an 802.1Q VLAN tag. A tag is a numeric value that identifies a virtual port within the VLAN. The same VLAN can have different tag values on different ports. However, a port

can have only one tag value in a given VLAN. A VLAN can also have untagged ports. An untagged port can be a member of only one VLAN.

MSS supports the IEEE 802.1Q tag type, described in the IEEE 802.1Q specification.

The tagging capabilities of the WX are flexible. You can assign 802.1Q tag values on a per-VLAN, per-port basis. The same VLAN can have different tag values on different ports. In addition, the same tag value can be used by different VLANs but on different network ports.

If you use a tag value, 3Com recommends that you use the same value as the VLAN number. MSS does not require the VLAN number and tag value to be the same, but some other vendors’ devices do.

Do not assign the same VLAN multiple times using different tag values to the same network port. Although MSS does not prohibit you from doing so, the configuration is not supported.

1Access the VLAN table:

a Select the Configuration tool bar option.

b In the Organizer panel, click the plus sign next to the WX switch. c Click the plus sign next to System.

d Select VLANs.

2In the Content panel, select the VLAN.

3In the Task List panel, select Configure VLAN Members.

4To add a port or port group to the VLAN and remove previous VLAN membership, select the port or port group and click Move.

To make multiple selections, press Shift (for contiguous items) or Control (for noncontiguous items) while clicking items.

Only ports configured as network ports are listed. You cannot add MAPs, Distributed MAPs, or wired authentication ports to a VLAN.

5To add a port or port group to the VLAN and retain previous VLAN membership, select the port or port group and click Add.