Working With Vlans - Avaya G860 Installing And Operating

Avaya G860 Media Gateway
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12.4

Working with VLANs

A VLAN is a logical grouping of nodes that reside in a common broadcast domain of
the network, without any router hops. All the VLAN members can also be viewed as a
group of devices on different physical LAN segments which can communicate with
each other as if they were all on the same physical LAN segment. VLANs provide a
number of benefits over the Typical Routed Network.
Note: The number of VLANs is greater or equal to the number of subnets.
VLANs control broadcast traffic. If a device in a particular VLAN transmits a broadcast
frame, only devices in that VLAN receive the frame.
VLANs provide extra security. Devices in a VLAN can only communicate with devices
on the same VLAN.
VLANs facilitates moves, additions, and changes for devices on networks. If a device
in a VLAN is moved to a port in another part of the network, you can configure the new
port to be in the VLAN of the moved device.
If the end node device is VLAN aware, the port automatically forwards the packets to
the proper location. No reconfiguration is required.
When working within VLAN, each Ethernet frame in the VLAN is marked with VLAN ID
(tag). The VLAN ID may be carried in the same frame itself when the frame has been
tagged by the source station (or tagging switch), or the VLAN ID may be set to a
default value assigned to the receiving port. Every switch port must be attached to at
least one VLAN.
All frames that enter the switch are identified as to their VLAN membership. Once the
frame is identified as belonging to a particular VLAN, it may only be forwarded to other
ports that are members of that VLAN. VLAN membership is determined by a VLAN
Identifier (VID). The VID may be carried in the frame itself when the frame has been
tagged by the source station (or a tagging switch), or the VID may be set to a default
value assigned to the receiving port. The default VID assigned to a frame by the
receiving port, when the frame is not already tagged, is called the Port VID or PVID.
This parameter is set by management action.
Once a frame has been identified as belonging to a VLAN, it can be transmitted only
to those ports that are members of that VLAN.
106 Installation & Operation Manual
For the static routes set the following parameters:
Destination IP
Destination Subnet Mask
Gateway IP
Protocol Group Type
Hops Count
Comment
For The Default Gateway (Router) of the Control subnet, click Add Static
Route. The Static Route Table screen appears.