you want to merge two or more VLANs into a single domain, you change the VLAN
configuration on all the devices in the separate domains. This can be a tedious
task. To more easily merge multiple VLANs into a single broadcast domain, you
can use bridge groups.
The bridge groups
feature works the same way as a VLAN. Multiple VLANS can be bound to a single
bridge group, and all VLANs bound to same bridge group form a single broadcast
domain. You can bind only Layer 2 VLANs to a bridge group. For Layer 3
functionality, you must assign an IP address to a bridge group.
In Layer 2 mode,
a broadcast packet received on an interface belonging to a particular VLAN is
bridged to other VLANs that belong to the same bridge group. In the case of a
unicast packet, the NetScaler appliance searches its bridge table for the
learned MAC addresses of all the VLANs belonging to same bridge group.
In Layer 3
forwarding mode, an IP subnet is bound to a bridge group. The NetScaler accepts
incoming packets belonging to the bound subnet and forwards the packets only on
VLANs that are bound to the bridge group.
IPv6 routing can
be enabled on a configured bridge group.