24-port NWay Ethernet Switch User’s Guide
56
Switch Management and Operating Concepts
Notes About VLANs on the DES-3326
1. No matter what basis is used to uniquely identify
end nodes and assign these nodes VLAN
membership, packets
cannot
cross VLANs
without a network device performing a routing
function between the VLANs.
2. The DES-3326 supports only IEEE 802.1Q VLANs.
The port untagging function can be used to remove
the 802.1Q tag from packet headers to maintain
compatibility with devices that are tag-unaware.
3. The default switch mode is -
Layer 2 Only
and
IP Routing
mode - is to assign all ports to a
single
IEEE802.1Q VLANs named
DEFAULT_VLAN
.
As new VLANs are created,
the member ports assigned to the new VLAN will
be removed from the
DEFAULT_ VLAN
port
member list.
4. The
DEFAULT_VLAN
has a VID = 1. An IP
interface called
System
in the IP interface entry
menu also has a VID = 1, and therefore
corresponds to the
DEFAULT_VLAN
.
5. There is no difference in the creation, deletion,
configuration, or editing of 802.1Q VLANs
whether the switch is in
Layer 2 Only
, or
IP
Routing
mode, except that once assigned an IP
interface, a VLAN cannot be deleted until the IP
interface is deleted.
6. There is a difference in the
behavior
of VLANs
when the switch is in
Layer 2 Only
or
IP
Routing
mode. In
Layer 2 Only
mode, network
resources cannot be shared across VLANs. In
IP
