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Virtual LANs (VLANs) 5-5
If you use AutoSelect VLAN Mode, note the follow-
ing:
■
You need to specify an IP address and community
string for the VLAN Server.
■
You cannot use VLAN 15.
■
If a port has been configured as a backbone
port or as a VLT port, the port cannot use
AutoSelect VLAN Mode.
■
If a port has a permanent address stored against
it in the Switch Database, the port cannot use
AutoSelect VLAN Mode.
■
We recommend that you connect each switch
port to a single endstation. If you want to con-
nect a port to multiple endstations, specify that
the port uses Port VLAN Mode.
For information about how to set up VLANs using
AutoSelect VLAN Mode, refer to “Setting Up
VLANs Using AutoSelect VLAN Mode” on page
5-10.
For more information about the VLAN Server data-
base, refer to the documentation supplied with
3Com’s Transcend Enterprise Manager.
Using Non-routable Protocols
If you are running non-routable protocols on your
network (for example, DEC LAT or NET BIOS),
devices within one VLAN are not able to communi-
cate with devices in a different VLAN.
Using Unique MAC Addresses
If you connect a server with multiple network adapt-
ers to the Switch, we recommend that you config-
ure each network adapter with a unique MAC
address.
Extending VLANs into an ATM Network
If the Switch has an ATM OC-3c Module installed,
you can extend the VLANs you have defined in
your existing network into an ATM network. For
more information, refer to the “
SuperStack II
Switch ATM OC-3c Module User Guide”
.