3com 2848-sfp plus Guia Do Utilizador
34
C
ONFIGURING
THE
S
WITCH
Communication between different VLANs can only take
place if they are all connected to a router or layer 3
switch.
place if they are all connected to a router or layer 3
switch.
Creating a VLAN
Use the Create VLANs screen to create VLANs on the
Switch. To propagate information about VLAN groups
used on this Switch to external devices, you must
specify a VLAN ID for each VLAN.
Switch. To propagate information about VLAN groups
used on this Switch to external devices, you must
specify a VLAN ID for each VLAN.
1
In VLAN ID, choose “Create New VLAN” from the drop
down menu.
down menu.
Figure 13 Create VLANs Screen
■
VLAN ID — ID of configured VLAN (1-4094, no
leading zeroes).
leading zeroes).
For examples on setting up VLANs, refer to “Sample
VLAN Configurations” on page 35.
VLAN Configurations” on page 35.
CAUTION: At least one port must always be an
untagged member of VLAN 1 (the management VLAN).
If you choose to connect all ports to VLANs other than
VLAN 1, you will no longer be able to access the Web
interface. If this happens, you will need to reset the
Switch to factory settings.
untagged member of VLAN 1 (the management VLAN).
If you choose to connect all ports to VLANs other than
VLAN 1, you will no longer be able to access the Web
interface. If this happens, you will need to reset the
Switch to factory settings.
By default, all ports belong to VLAN 1 as an untagged
member. Also, newly created VLANs will initially have no
ports associated with them.
member. Also, newly created VLANs will initially have no
ports associated with them.
Each port will always belong to either VLAN 0 or 1 as
an untagged member. However, they can belong to
multiple VLANs as a tagged member.
an untagged member. However, they can belong to
multiple VLANs as a tagged member.
Modify VLANs
Click the icon under each port number to configure the
port mode of a selected VLAN. To change the mode of
all ports, click the icon under “All”.
port mode of a selected VLAN. To change the mode of
all ports, click the icon under “All”.
Available options for each port include (only one option
can be associated with a single port):
can be associated with a single port):
■
N – Not a member. If you select this, the port is not
a member of the currently selected VLAN.
a member of the currently selected VLAN.
■
T - Tagged. If you select this, the port is able to
communicate with all VLANs on the Switch.
communicate with all VLANs on the Switch.
■
U - Untagged. If you select this, the port can only
communicate with other ports assigned to the same
VLAN selected in the VLAN ID drop down list.
communicate with other ports assigned to the same
VLAN selected in the VLAN ID drop down list.