Specifications

Types of VLANs
ExtremeWare XOS 11.0 Concepts Guide 83
Figure 1: Example of a port-based VLAN on an Extreme Networks switch
For the members of different IP VLANs to communicate, the traffic must be routed by the switch, even
if the VLANs are physically part of the same I/O module. This means that each VLAN must be
configured as a router interface with a unique IP address.
Spanning Switches with Port-Based VLANs
To create a port-based VLAN that spans two switches, you must do two things:
1 Assign the port on each switch to the VLAN.
2 Cable the two switches together using one port on each switch per VLAN.
Figure 2 illustrates a single VLAN that spans a BlackDiamond switch and another Extreme Networks
switch. All ports on the system 1 switch belong to VLAN Sales. Ports 1 through 29 on the system 2
switch also belong to VLAN Sales. The two switches are connected using slot 8, port 4 on system 1 (the
BlackDiamond switch), and port 29 on system 2 (the other switch).
Figure 2: Single port-based VLAN spanning two switches
To create multiple VLANs that span two switches in a port-based VLAN, a port on system 1 must be
cabled to a port on system 2 for each VLAN you want to have span across the switches. At least one
port on each switch must be a member of the corresponding VLANs, as well.
EX_060
Sales
Marketing
Finance
System 1
System 2
EX_061
Sales