All VRRP VLANs participating in same group
should have same topology in a given router.
VRRP groups and individual VRs can not be mixed when VRs use the same
VRID and are configured to operate in regular master-backup mode.
Fabric Routing must be enabled for the group of VRs if the same VRID is
repeated in multiple groups.
When the number of VRs configured on a router exceeds 511, you must
switch to high-scale mode (use VRRP grouping) to obtain scaling to 2,048 VR instances.
The same group does not support combinations of some IPv4 VRs and some IPv6 VRs. Separate
groups must be used for each type.
