Chapter 11 Avaya P330 Layer 2 Features
In Figure 11.2, the switch has three separate VLANs: Sales, Engineering, and Marketing (Mktg). Each VLAN has several physical ports assigned to it with PC’s connected to those ports. When traffic flows from a PC on the Sales VLAN for example, that traffic is only forwarded out the other ports assigned to that VLAN. Thus, the Engineering and Mktg VLANs are not burdened with processing that traffic.
Figure 11.2 VLAN Switching and Bridging
Sales | Mktg |
Sales
Engineering
Mktg
Engineering
VLAN Tagging
VLAN Tagging is a method of controlling the distribution of information on the network. The ports on devices supporting VLAN Tagging are configured with the following parameters:
•Port VLAN ID
•Tagging Mode
The Port VLAN ID is the number of the VLAN to which the port is assigned. Untagged frames (and frames tagged with VLAN 0) entering the port are assigned the port's VLAN ID. Tagged frames are unaffected by the port's VLAN ID.
The Tagging Mode determines the behavior of the port that processes outgoing frames:
•If Tagging Mode is set to “Clear”, the port transmits frames that belong to the port's VLAN table. These frames leave the device untagged.
•If Tagging Mode is set to
Multi VLAN Binding
Multi VLAN binding (Multiple VLANs per port) allows access to shared resources by stations that belong to different VLANs through the same port. This is useful in applications such as
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