User`s guide

Chapter 4: Examples
4-6 DIGITAL MultiSwitch 700 Port Based VLAN User’s Guide
4.2.1 Solving the Problem
To solve the problem in this example, the users are assigned to VLANs
using Switch 4 and Switch 2 as shown in Figure 4-3. Redco users are
assigned to the Red VLAN and Blue Industries users to the Blue VLAN.
The following information shows how Switch 4 and Switch 2 are
configured to create the two VLANs to isolate the users of the two
companies from one another on the network using the existing
infrastructure.
Switch 4
Switch 4 is set as follows:
1. The VLAN Operational Mode is set to SECURE using the
Device/VLAN Configuration screen.
2. Two VLANs are added to the list of VLANs in the Device/VLAN
Configuration screen. In this example they are as follows:
• VLAN ID 222 with a VLAN Name of Red
• VLAN ID 223 with a VLAN Name of Blue
3. A Port VLAN ID is assigned to each port (1, 3, and 4) as follows using
the Port Assignment screen:
• Port 1, VLAN ID: 222 for the Red VLAN
• Port 3, VLAN ID: 223 for the Blue VLAN
• Port 4, Port Mode: 1Q Trunk
This causes the switch to classify all frames received as belonging to
the VLAN specified and to replace the current Default VLAN settings
in the Egress List with these settings, so that port 1 is part of the Red
VLAN, port 3 is part of the Blue VLAN, and both are set as VLAN
frame format of untagged. Port 4 is set as an 802.1Q Trunk port, which
makes the port Egress List contain all VLANs, and all frames
forwarded out this port are forwarded as tagged frames. This tag
allows the receiving switch to maintain the original frame
classification.