Bridging Vlans Across Multiple Switches - Alcatel OmniSwitch 6600 Family Network Configuration Manual

Configuring VLANs

Bridging VLANs Across Multiple Switches

To create a VLAN bridging domain that extends across multiple switches:
1
Create a VLAN on each switch with the same VLAN ID number (e.g., VLAN 10).
2
If using mobile ports for end user device connections, define VLAN rules that will classify mobile port
traffic into the VLAN created in Step 1.
3
On each switch, assign the ports that will provide connections to other switches to the VLAN created
in Step 1.
4
On each switch, assign the ports that will provide connections to end user devices (e.g., workstations)
to the VLAN created in Step 1. (If using mobile ports, this step will occur automatically when the device
connected to the mobile port starts to send traffic.)
5 Connect switches and end user devices to the assigned ports.
The following diagram shows the physical configuration of an example VLAN bridging domain:
Switch B
138.0.0.3
2/2
OmniSwitch 6648
VLAN 10
OmniSwitch 6648
OmniSwitch 6648
OmniSwitch 6648
VLAN 10
OmniSwitch 6648
OmniSwitch 6648
3/8
Switch A
138.0.0.2
In the above diagram, VLAN 10 exists on all four switches and the connection ports between these
switches are assigned to VLAN 10. The workstations can communicate with each other because the ports
to which they are connected are also assigned to VLAN 10. It is important to note that connection cables
do not have to connect to the same port on each switch. The key is that the port must belong to the same
VLAN on each switch. To carry multiple VLANs between switches across a single physical connection
cable, use the 802.1Q tagging feature (see
OmniSwitch 6600 Family Network Configuration Guide
VLAN 10
2/1
VLAN 10
2/3
2/10
VLAN 10
2/9
VLAN 10
VLAN Bridging Domain: Physical Configuration
Chapter 11, "Configuring
Bridging VLANs Across Multiple Switches
Switch C
OmniSwitch 6648
VLAN 10
OmniSwitch 6648
3/7
OmniSwitch 6648
VLAN 10
3/9
3/2
VLAN 10
3/1
OmniSwitch 6648
VLAN 10
OmniSwitch 6648
OmniSwitch 6648
Switch A
802.1Q").
April 2006
138.0.0.4
3/10
VLAN 10
VLAN 10
3/3
138.0.0.5
page 4-13