Cabletron Systems 802.1Q manual Example 4, Isolating Network Traffic According to Protocol

Example 4, Isolating Network Traffic According to Protocol

4.4EXAMPLE 4, ISOLATING NETWORK TRAFFIC ACCORDING TO PROTOCOL

This final example illustrates how to restrict AppleTalk protocol traffic of a network to prevent unwanted multicast frames from slowing down the whole network and yet be able to send and receive frames associated with other protocols.

In this example, illustrated in Figure 4-7, the Publications Department is relocating from another site to the third floor. This network will consist of six computers and a printer using several protocols including the AppleTalk protocol. A characteristic of the AppleTalk protocol is to send all frames as multicast frames. These multicast frames will be isolated to a VLAN (Grey VLAN) to prevent them from slowing down the other networks.

A second VLAN (Yellow VLAN) will be established to handle traffic of other protocols. The Publications Department users will have access to the mail server on the first floor along with the Red, Blue, and Green VLANs.

802.1Q VLAN User’s Guide 4-17