WESM zl Management and Configuration Guide WT.01.XX and greater

9-16
Fast Layer 2 Roaming and Layer 3 Mobility
Configuring Layer 3 Mobility
Table 9-2. Other Configurations Necessary for Layer 3 Roaming
Configuring Layer 3 Mobility Settings
The first step in establishing a Layer 3 mobility domain is configuring local
Layer 3 mobility settings on your Wireless Edge Services zl Module. You must
specify:
■ the IP address that the module uses in the mobility domain:
• an IP address configured on the local Wireless Edge Services zl
Module
• an IP address reachable by all peers
In other words, the VLAN with this IP address must be tagged on the
module’s uplink port. Network infrastructure devices must also be
able to route to this address.
■ the local WLANs that can use Layer 3 roaming
Stations do not roam between these WLANs. Stations only roam between
RPs that support the same WLAN. Wireless Edge Services zl Modules
create a separate Layer 3 mobility domain for each WLAN.
To configure the Layer 3 mobility settings, complete these steps:
1. Select Network Setup > Layer 3 Mobility > Configuration.
Configuration Necessary Settings
WLAN configuration (for each WLAN
on which Layer 3 mobility is enabled)
• SSID and security settings are the same as peers’
settings.
• VLAN ID is different from at least some peers’
VLAN settings. Different subnetworks must have
different VLAN IDs.
• Dynamic VLAN assignment is disabled.
IP configuration on the local module • The module can reach peers.
• The peers can reach the module.
IP configuration for stations • DHCP is provided through either:
– local DHCP pool for the VLAN mapped to the
WLAN
– external DHCP server