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472 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Configuring VLAN groups and virtual routing interface groups
13
NOTE
Because virtual routing interfaces 2 and 3 do not have their own IP subnet addresses but instead
are “following” virtual routing interface a IP address, you still can configure an IPX or AppleTalk
interface on virtual routing interfaces 2 and 3.
Configuring VLAN groups and virtual routing interface groups
To simplify configuration when you have many VLANs with the same configuration, you can
configure VLAN groups and virtual routing interface groups.
NOTE
VLAN groups are supported on Layer 3 Switches and Layer 2 Switches. Virtual routing interface
groups are supported only on Layer 3 Switches.
When you create a VLAN group, the VLAN parameters you configure for the group apply to all the
VLANs within the group. Additionally, you can easily associate the same IP subnet interface with all
the VLANs in a group by configuring a virtual routing interface group with the same ID as the VLAN
group.
• The VLAN group feature allows you to create multiple port-based VLANs with identical port
members. Because the member ports are shared by all the VLANs within the group, you must
add the ports as tagged ports. This feature not only simplifies VLAN configuration but also
allows you to have a large number of identically configured VLANs in a startup-config file on the
device flash memory module. Normally, a startup-config file with a large number of VLANs
might not fit on the flash memory module. By grouping the identically configured VLANs, you
can conserve space in the startup-config file so that it fits on the flash memory module.
• The virtual routing interface group feature is useful when you want to configure the same IP
subnet address on all the port-based VLANs within a VLAN group. You can configure a virtual
routing interface group only after you configure a VLAN group with the same ID. The virtual
routing interface group automatically applies to the VLANs in the VLAN group that has the
same ID and cannot be applied to other VLAN groups or to individual VLANs.
You can create up to 32 VLAN groups and 32 virtual routing interface groups. A virtual routing
interface group always applies only to the VLANs in the VLAN group with the same ID.
NOTE
Depending on the size of the VLAN ID range you want to use for the VLAN group, you might need to
allocate additional memory for VLANs. On Layer 3 Switches, if you allocate additional memory for
VLANs, you also need to allocate the same amount of memory for virtual routing interfaces. This is
true regardless of whether you use the virtual routing interface groups. To allocate additional
memory, refer to “Allocating memory for more VLANs or virtual routing interfaces” on page 476.
Configuring a VLAN group
To configure a VLAN group, enter commands such as the following.
PowerConnect(config)# vlan-group 1 vlan 2 to 257
PowerConnect(config-vlan-group-1)# tagged 1/1 to 1/2