NEC WL1700-MS Installation Manual - page 186
Manual is about: UNIVERGE WL Series Wireless Controller
of
226
Data Assignment
Chapter 4
INITIAL SETUP
152
2
Configure Mobility Domain
Mobility Domain consists of two types of WL Controllers: seed and member.
In a mobility domain, a single seed distributes the mobility domain
information to the members, and make a particular domain network across
multiple networks.
For examples, even if a terminal is moved to another network that does not
contain the same VLAN ID, the WL Controller will make connection with an
appropriate WL Controller by tunnelling through mobility domain. Thereby,
the terminal will be able to move from a network to another network,
maintaining sessions and the same IP address on the same VLAN ID.
Note.
When using WL1700-MS, Mobility Domain configured with only WL1700-MSs is
available.