NEC WL1700-MS Installation Manual - page 42
Network Topology with WL Controllers
Chapter 1
OVERVIEW
8
Mobility Domain
UNIVERGE WL System can create mobility domains, which contains multiple
WL Controllers. Mobility Domain is a special domain for Mobility terminals.
When the mobility user roams and connects to another Access Point that the
different Controller but assigned to the Mobility Group manages, the user do not
need to acquire a new IP address from the Controller again; the user can retain the
same IP address across the subnets or VLAN.
Mobility Domain consists of two types of UNIVERGE WL Controllers: seed (a
single WL Controller is functioned as Server function per Mobility Domain.) and
member (other WL Controllers are functioned as Client function in the Mobility
Domain.). When a member requires the information for controller belonging to
the Mobility domain, the seed-functioned Controller provides it to the member.
The following figures explains how a seed and members work in a Mobility
Domain:
l
Process After data assignment of Mobility Domain
PWR
ACT
ALM
LOAD
USB
LINK/ACT
Ether 1
Ether 2
SPEED
PWR1
PWR2
Mobility Domain
HUB xxxxxx
HUB xxxxxx
HUB xxxxxx
HUB xxxxxx
member3
member1
member2
seed
Ether1
100M LINK
100M LINK
Ether2
PWR
ACT
ALM
LOAD
Ether1
100M LINK
100M LINK
Ether2
PWR
ACT
ALM
LOAD
Ether1
100M LINK
100M LINK
Ether2
PWR
ACT
ALM
LOAD
Ether1
100M LINK
100M LINK
Ether2
PWR
ACT
ALM
LOAD
Ether1
100M LINK
100M LINK
Ether2
PWR
ACT
ALM
LOAD
Ether1
100M LINK
100M LINK
Ether2
PWR
ACT
ALM
LOAD
VLAN Info
A seed adds all of the Controllers' VLAN
information to its management table.
VLAN:Virtual Local Area Network
VLAN Info
VLAN Info
(1) VLAN Infomation is provided
by each member
(2) All the VLAN information in the Mobility Domain
is distributed from the seed.