75
DSCP Remarking:
Enable or disable DSCP Remarking.
State:
Disable or enable the mapping entry.
Rx-DSCP:
Specify the DSCP value to be remarked.
New-DSCP:
Specify the remarking DSCP value.
Click the
“OK”
button to apply the settings.
Note:
The VID remarking has higher priority than the other remarking modes. (VID remarking >
802.1p remarking > DSCP remarking)
3.4.6 VLAN Configuration
A Virtual Local Area Network (VLAN) is a network topology configured according to a logical
scheme rather than the physical layout. VLAN can be used to combine any collections of LAN
segments into a group that appears as a single LAN. VLAN also logically segments the network into
different broadcast domains. All broadcast, multicast, and unknown packets entering the Gateway
Controller on a particular VLAN will only be forwarded to the stations or ports that are members of
that VLAN.
VLAN can enhance performance by conserving bandwidth and improve security by limiting traffic to
specific domains. A VLAN is a collection of end nodes grouped by logics instead of physical locations.
End nodes that frequently communicate with each other are assigned to the same VLAN, no matter
where they are physically located on the network. Another benefit of VLAN is that you can change the
network topology without physically moving stations or changing cable connections. Stations can be
‘moved’ to another VLAN and thus communicate with its members and share its resources, simply by
changing the port VLAN settings from one VLAN to another. This allows VLAN to accommodate
network moves, changes and additions with the greatest flexibility.
The Gateway Controller supports two types of VLAN, these are:
IEEE 802.1q Tag VLAN
and
Q in Q
VLAN.
IEEE 802.1Q VLAN Concepts
Introduction to 802.1Q frame format:
