3Com 3C16476A User Guide - Page 39

Forwarding Tagged/Untagged Frames, Port Detail, VLAN Detail

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Port Detail Choose a port to display the tagged and untagged VLAN memberships it is associated with. Figure 30 Port Detail Screen Configuring VLANs 39 Figure 31 VLAN Detail Screen VLAN Detail Use this screen to display detailed VLAN information. 1 Enter a set of VLANs or select all VLANs to add to the details list, then click Select. 2 From drop down menu, choose a VLAN to display the tagged and untagged VLAN memberships it is associated with the ports on the switch. Forwarding Tagged/Untagged Frames 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.

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Configuring VLANs
39
Port Detail
Choose a port to display the tagged and untagged
VLAN memberships it is associated with.
Figure 30
Port Detail Screen
VLAN Detail
Use this screen to display detailed VLAN information.
1
Enter a set of VLANs or select all VLANs to add to the
details list, then click
Select
.
2
From drop down menu, choose a VLAN to display the
tagged and untagged VLAN memberships it is
associated with the ports on the switch.
Figure 31
VLAN Detail Screen
Forwarding Tagged/Untagged Frames
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.