Users Guide

Table Of Contents
400 | IP Mobility Dell PowerConnect ArubaOS 5.0 | User Guide
4. Traffic sent by Mobile Client B is also tunneled back to the home agent.
Figure 70 Routing of Traffic to Mobile Client within Mobility Domain
Configuring Mobility Domains
Before configuring a mobility domain, you should determine the user VLAN(s) for which mobility is required. For
example, you may want to allow employees to be able to roam from one subnetwork to another. All controllers
that support the VLANs into which employee users can be placed should be part of the same mobility domain.
A controller can be part of multiple mobility domains, although Dell recommends that a controller belong to only
one domain. The controllers in a mobility domain do not need to be managed by the same master controller.
You configure a mobility domain on a master controller; the mobility domain information is pushed to all local
controllers that are managed by the same master controller. On each controller, you must specify the active
domain (the domain to which the controller belongs). If you do not specify the active domain, the controller will
be assigned to a predefined “default” domain.
Although you configure a mobility domain on a master controller, the master controller does not need to be a
member of the mobility domain. For example, you could set up a mobility domain that contains only local
controllers; you still need to configure the mobility domain on the master controller that manages the local
controllers. You can also configure a mobility domain that contains multiple master controllers; you need to
configure the mobility domain on each master controller.
The basic tasks you need to perform to configure a mobility domain are listed below. The sections following
describe each task in further detail. A sample mobility domain configuration is provided in “Example
Configuration” on page402.
You can enable or disable IP mobility in a virtual AP profile (IP mobility is enabled by default). When IP mobility
is enabled in a virtual AP profile, the ESSID that is configured for the virtual AP supports layer-3 mobility. If you
disable IP mobility for a virtual AP, any clients that associate to the virtual AP will not have mobility service.
Host A
Mobile Client B
Home Agent Foreign Agent
Client’s Home Network
Foreign Network
1
2
3
4
Note: Dell mobility domains are supported only on Dell controllers.
Table 76 Basic tasks to configure mobility domain
On a master controller: On all controllers in the mobility domain:
Configure the mobility domain, including the
entries in the home agent table (HAT)
z Enable mobility (disabled by default)
z Join a specified mobility domain (not required for “default” mobility
domain)