3Com WX4400 Reference Manual page 217

2 In the VLAN Name box, type the name of the VLAN (1 to 16 alphabetic
characters long, with no spaces or tabs). You cannot use a number as the
first character in a VLAN name.
VLAN names must be globally unique across a Mobility Domain to ensure
the intended user connectivity as determined through authentication and
authorization.
Every VLAN on a WX has a VLAN name, used for authorization purposes,
and a VLAN number. VLAN numbers can vary uniquely for each WX and
are not related to 802.1Q tag values even when used.
3 In the VLAN ID box, specify a VLAN number (2 to 4093). The VLAN
number must be unique on a particular WX.
4 Click Next.
5 From the list of available members, select a port or port group (if you
previously created port groups).
If a port or port group is currently a member of a VLAN, the VLAN name
is listed in the VLAN(s) column. To select multiple VLANs, press Shift
while clicking to select contiguous items, or press Control while clicking
to select noncontiguous items.
6 Do one of the following:
To add a port or port group to the VLAN and remove previous VLAN
membership, click Move.
Moving a port or port group could potentially affect multiple VLANs.
To add a port or port group to the VLAN and retain previous VLAN
membership, click Add.
7 Click Next.
8 To add an IP interface to the VLAN, do one of the following:
Statically configure an address by editing the IP address and subnet
mask (for example, 10.10.10.10/16).
Select DHCP Client to use a DHCP server to dynamically obtain an IP
address for the VLAN.
Generally, VLANs are equivalent to IP subnets. If a WX is connected to the
network by only one IP subnet, the WX must have at least one VLAN
configured. Optionally, each VLAN can have its own IP address. However,
no two IP addresses on the switch can belong to the same IP subnet.
Viewing and Configuring VLANs 217