Mobility Domain - NEC WL1700-MS Installation Manual

Network Topology with WL Controllers
Chapter 1

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:
Process After data assignment of Mobility Domain
l
Mobility Domain
PWR ALM ACT
VLAN:Virtual Local Area Network
8
A seed adds all of the Controllers' VLAN
information to its management table.
seed
USB Ether 1
PWR ALM ACT LOAD
PWR1 PWR2
Ether 2
LINK/ACT SPEED
HUB xxxxxx
VLAN Info
VLAN Info
member2
member1
PWR ALM ACT LOAD 100M LINK 100M LINK PWR ALM ACT LOAD
Ether1 Ether2
LOAD 100M LINK 100M LINK PWR ALM ACT LOAD 100M LINK 100M LINK
Ether1 Ether2 Ether1 Ether2
HUB xxxxxx
HUB xxxxxx
OVERVIEW
(1) VLAN Infomation is provided
by each member
VLAN Info
(2) All the VLAN information in the Mobility Domain
is distributed from the seed.
member3
100M LINK 100M LINK
Ether1 Ether2
100M LINK 100M LINK 100M LINK 100M LINK
PWR ALM ACT LOAD PWR ALM ACT LOAD
Ether1 Ether2 Ether1 Ether2
HUB xxxxxx