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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.
Configuring a Mobility Domain
You configure mobility domains on master Dell controllers. All local Dell controllers managed by the master
controller share the list of mobility domains configured on the master. Mobility is disabled by default and must be
explicitly enabled on all Dell controllers that will support client mobility. Disabling mobility does not delete any
mobility-related configuration.
The home agent table (HAT) maps a user VLAN IP subnet to potential home agent addresses. The mobility feature
uses the HAT table to locate a potential home agent for each mobile client, and then uses this information to
perform home agent discovery. To configure a mobility domain, you must assign a home agent address to at least
one controller with direct access to the user VLAN IP subnet. (Some network topologies may require multiple home
agents.)
Dell recommends you configure the switch IP address to match the AP’s local controller
or
define the Virtual Router
Redundancy Protocol (VRRP) IP address to match the VRRP IP used for controller redundancy. Do not configure
both a switch IP address and a VRRP IP address as a home agent address, or multiple home agent discoveries may
be sent to the controller.
NOTE: All user VLANs that are part of a mobility domain must have an IP address that can correctly forward layer-3 broadcast
multicast traffic to clients when they are away from home network.
Configure the HAT with a list of every subnetwork, mask, VLAN ID, VRRP IP, and home agent IP address in the
mobility domain. Include an entry for every home agent and user VLAN to which an IP subnetwork maps. If there is
more than one controller in the mobility domain providing service for the same user VLAN, you must configure an
entry for the VLAN for each controller. Dell recommends using the same VRRP IP used by the AP.
The mobility domain named “default” is the default active domain for all Dell controllers. If you need only one
mobility domain, you can use this default domain. However, you also have the flexibility to create one or more user-
defined domains to meet the unique needs of your network topology. Once you assign a controller to a user-defined
domain, it automatically leaves the “default” mobility domain. If you want a controller to belong to both the
“default” and a user-defined mobility domain at the same time, you must explicitly configure the “default” domain
as an active domain for the controller.
Using the WebUI
The following procedure illustrates configuring mobility domain on a master controller.
1. Navigate to the Configuration > Advanced Services > IP Mobility page. Select the Enable IP Mobility
checkbox.
2. To configure the default mobility domain, select the “default” domain in the Mobility Domain list.
To create a new mobility domain, enter the name of the domain in Mobility Domain Name and click Add; the
new domain name appears in the Mobility Domain list.
3. Select the newly-created domain name. Click Add under the Subnet column. Enter the subnetwork, mask, VLAN
ID, VRIP, and home agent IP address and click Add. Repeat this step for each HAT entry.
4. Click Apply.
Using the CLI
The following command configures mobility domain on a master controller.
router mobile
DellPowerConnectW-SeriesArubaOS6.2 | User Guide IPMobility | 494