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Configuring Virtual LANs (VLANs)
December 2005
© Foundry Networks, Inc.
11 - 43
maximum numbers of VLANs and virtual routing interfaces for Layer 3 Switches and Layer 2 Switches. Unless
otherwise noted, the values apply to both types of switches.
NOTE:
If many of your VLANs will have an identical configuration, you might want to configure VLAN groups and
virtual routing interface groups after you increase the system capacity for VLANs and virtual routing interfaces.
See “Configuring VLAN Groups and Virtual Routing Interface Groups” on page 11-40.
Increasing the Number of VLANs You Can Configure
NOTE:
Although you can specify up to 4095 VLANs, you can configure only 4094 VLANs. VLAN ID 4094 is
reserved for use by the Single Spanning Tree feature.
To increase the maximum number of VLANs you can configure, enter commands such as the following at the
global CONFIG level of the CLI:
FESX424 Router(config)# system-max vlan 2048
FESX424 Router(config)# write memory
FESX424 Router(config)# end
FESX424 Router# reload
Syntax:
system-max vlan <num>
The <num> parameter indicates the maximum number of VLANs. The range of valid values depends on the
device you are configuring. See Table 11.2.
Increasing the Number of Virtual Routing Interfaces You Can Configure
To increase the maximum number of virtual routing interfaces you can configure, enter commands such as the
following at the global CONFIG level of the CLI:
FESX424 Router(config)# system-max virtual-interface 4095
FESX424 Router(config)# write memory
FESX424 Router(config)# end
FESX424 Router# reload
Syntax:
system-max virtual-interface <num>
The <num> parameter indicates the maximum number of virtual routing interfaces. The range of valid values
depends on the device you are configuring. See Table 11.2.
Configuring Super Aggregated VLANs
You can aggregate multiple VLANs within another VLAN. This feature allows you to construct Layer 2 paths and
channels. This feature is particularly useful for Virtual Private Network (VPN) applications in which you need to
provide a private, dedicated Ethernet connection for an individual client to transparently reach its sub-net across
multiple networks.
Conceptually, the paths and channels are similar to Asynchronous Transfer Mode (ATM) paths and channels. A
path contains multiple channels, each of which is a dedicated circuit between two end points. The two devices at
Table 11.2: VLAN and Virtual Routing Interface Support
VLANs
Virtual Routing Interfaces
Default
Maximum
Configurable
Maximum
Default
Maximum
Configurable
Maximum
64
4094
255
512
Summary of Contents for FastIron Edge Switch X424
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