Example 7, dynamic egress application – Enterasys Networks 2200 User Manual

Page 307

Example 7, Using Dynamic Egress to Control Traffic

VLAN Operation and Network Applications

12-45

Figure 12-25

Example 7, Dynamic Egress Application

Solving the Problem

In this example, Switch 1 (S1) has already been configured with a default VLAN 0001 associated
with FID 0001 as the PVID on all ports.

The following additional steps are required to configure the switch to solve this problem.

1. Define a new VLAN (VLAN ID 2) and filtering database (FID 2) using the Device VLAN

Configuration screen.

2. Create a Layer 2 rule to associate the protocol AppleTalk 809B and 80F3 to VLAN ID 2 (VID 2)

using the VLAN Classification Configuration screen. This rule is assigned to all ports.

3. Enable the dynamic egress control on VLAN 2 using the Network Tools command

(dynamic_egress enable 2).

With the above configuration, an AppleTalk frame received on any port will be classified into
VLAN 2 (the AppleTalk VLAN), and the Port VLAN List of that port is updated to include
VLAN 2.

For instance, if port 1 or 2 is connected to a new AppleTalk user, the AppleTalk frames received on
that port are dynamically associated with VLAN 2 and VLAN 2 is added to the Port VLAN List of
that port. The Port VLAN List contains a list of all VLANs whose frames can be transmitted out
that port.

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