3com 2226 PLUS Benutzerhandbuch

Figure 30   VLAN Detail Screen

Each port on the Switch is capable of passing 
tagged or untagged frames.

The following describes how the Switch will 
handle tagged and untagged frames.

■

When a port receives a tagged frame with a 
VLAN ID and the port is a member 
(untagged or tagged) of that VLAN, the 
frame is accepted. Otherwise the if the port 

is not a member of that VLAN, the frame is 
discarded.

■

When a port receives an untagged frame 
and the port is an untagged member of a 
VLAN, the frame is accepted and assigned to 
that VLAN ID. Otherwise if the port is not an 
untagged member of any VLAN, the frame is 
discarded.

The Switch will only forward a frame to ports 
that are members (tagged or untagged) of the 
VLAN to which the frame is assigned. If the 
port is an untagged member, the egress frame 
will be stripped of the VLAN tag and forwarded 
as untagged. However, if the port is a tagged 
member, the egress frame is forwarded as 
tagged.

To illustrate how you can segment network 
devices that are connected to the Switch, the 
following sample configurations are provided.