Contemporary Control Systems Compact Managed Switches Software Manual for Console Access - Manual (Page 20)

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4.3.5.7 Creating VLAN Groups and VIDs
Nine VLANs can be defined using the three Configure 802.1Q VLAN Group and VID
screens. The first screen (in this example, for an 8-port switch) appears in Figure 13 —
where each group by default has a unique VID, contains no Members, is Disabled and
has its Tag Filter set (Y) to remove VLAN tags from all ports as they forward messages
out of the switch. To access each screen in succession, select the Continue option in
the lower part of each of these three screens.
When creating a VLAN, several steps are required to complete the configuration. Do
not set any group’s Status to Enabled until all other configuration is complete. (This is
needed to avoid illegal VID values that would result unless all VIDs have been assigned
to the same continuous block of VID values as explained in Section 4.2.1.5.2).
To define the Members of each group, toggle the “–“ symbol into a “Y” symbol for each
port in the group. To the right of the bracketed group of Members (up to 24 ports on
some switch models) a lone “–“ symbol represents the “Management Port”. Include this
port in any group for which managed port behaviour is desired.
Beneath the Members group is the Tag Filter definition for the ports in question. When a
VLAN message leaves the switch, care must be exercised regarding the VLAN tag
contained in the message. In Port VLAN mode, the switch will insert a VLAN tag into
any message arriving from a non-VLAN-aware device. When this message exits the
switch, the tag will still be present. This tag could cause a problem if the receiving
device is not VLAN-aware. To remove the tag from the message, enable (set to “Y”) the
Tag Filter entry for Member ports that are connected to non-VLAN aware devices.
Figure 13 — Configure VLAN Group and VID