Alcatel-Lucent IAP93 Betriebsanweisung PDF herunterladen (Seite 201)

201 | Mobility and Client Management AOS-W Instant 6.3.1.1-4.0 | User Guide

Each foreign AP has only one home AP per AOS-W Instant network to avoid duplication of broadcast traffic.

Separate GRE tunnels are created for each foreign AP / home AP pair. If a peer AP is a foreign AP for one client and

a home AP for another, two separate GRE tunnels are used to handle L3 roaming traffic between these APs.

If client subnet discovery fails on association due to some reason, the foreign AP identifies its subnet when it sends

out the first L3 packet. If the subnet is not a local subnet and belongs to another Instant network, the client is treated

as an L3 roamed client and all its traffic is forwarded to the home network through a GRE tunnel.

Configuring L3-Mobility

To configure a mobility domain, you have to specify the list of all AOS-W Instant networks that form the mobility

domain. To allow clients to roam seamlessly among all the APs, specify the Virtual Controller IP for each foreign

subnet. You may include the local Instant or Virtual Controller IP address, so that the same configuration can be

used across all AOS-W Instant networks in the mobility domain.

It is recommended that you configure all client subnets in the mobility domain. When client subnets are configured:

l If a client is from a local subnet, it is identified as a local client. When a local client starts using the IP address,

the L3 roaming is terminated.

l If the client is from a foreign subnet, it is identified as a foreign client. When a foreign client starts using the IP

address, the L3 roaming is set up.

Home Agent Load Balancing

Home Agent Load Balancing is required in large networks where multiple tunnels might terminate on a single border

or lobby AP and overload it. When load balancing is enabled, the Virtual Controller assigns the home AP for roamed

clients by using a

round robin

policy. With this policy, the load for the APs acting as Home Agents for roamed clients

is uniformly distributed across the OAW-IAP cluster.

Configuring a Mobility Domain for AOS-W Instant

You can configure L3 mobility domain by using AOS-W Instant UI or CLI.

In the AOS-W Instant UI

To configure a mobility domain, perform the following steps:

1. Click the System link at top right corner of the AOS-W Instant main window. The System window is displayed.

2. Click the Show advanced options link. The advanced options are displayed.

3. Click L3 Mobility. The L3 Mobility window is displayed.

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Alcatel-Lucent IAP93 Betriebsanweisung Seite 201