3com WX2200 3CRWX220095A User Manual

A Mobility Domain is a system of WX switches and managed access 
points (MAPs) working together to support roaming wireless users 
(clients). Tunnels and virtual ports between the WX switches in a Mobility 
Domain allow users to roam without any disruption to network 
connectivity.

A Mobility Domain enables users to roam geographically across the 
system while maintaining their data sessions and VLAN or subnet 
membership, including IP address, regardless of how the WX switches are 
attached to the network backbone. As users move from one area of a 
building or campus to another, their association with servers or other 
resources appears the same. 

When users access a WX switch in a Mobility Domain, they become 
members of the VLAN designated through their authorized identity. If a 
user’s native VLAN is not present on the WX that he or she accesses, the 
accessed WX forms a tunnel to a WX in the Mobility Domain that 
includes the native VLAN. 

In a Mobility Domain, one WX switch acts as a seed device, which 
distributes information to the WX switches defined in the Mobility 
Domain. Otherwise, the seed WX switch operates like any other Mobility 
Domain member. 

(If your Mobility Domain uses firewalls or access controls between WX 
switches or AAA servers, see “Traffic Ports Used by MSS” on page 661 
for the ports typically used in a Mobility Domain.) 

3Com recommends that you run the same MSS version on all the WX 
switches in a Mobility Domain.