Mobility traffic manager
Key concepts
9-6
Automatic traffic distribution: VLAN ranges can be used to automatically spread
wireless user traffic across multiple VLANs on the wired infrastructure. See Scenario 6:
Distributing traffic using VLAN ranges.
Important MTM is only available on non-access-controlled VSCs.
The same VSCs must be defined on all controllers in the mobility domain, even
on controllers that are not managing any APs.
The mobility domain
The mobility domain is an interconnection between controllers allowing for the exchange of
information about wireless users and the home/local networks managed by controllers. The
mobility domain can span multiple controllers and controller teams, whether they are
installed on the same subnet or on different subnets, and includes all controlled APs managed
by the controllers.
In the following example the mobility domain spans three controllers and their APs operating
on three different subnets.
MTM makes use of the mobility domain to locate the home network for roaming users, or the
target network when tunneling traffic to a specific network on the wired infrastructure.
For each mobility domain, one controller is defined as the primary mobility controller. This
controller acts as the central site for the distribution of mobility information to all other
controllers. (When controller teaming is active, an entire team is defined as the primary
mobility controller. See Mobility support on page 8-26.)
W
L
A
N
LAN port
192.168.10.1/24
L3 switch
Primary
mobility
controller
1
1
2
3
L3 switch L3 switch
LAN port
192.168.20.1/24
LAN port
192.168.30.1/24
W
L
A
N
W
L
A
N
W
L
A
N
W
L
A
N
W
L
A
N
2
3
4
5
6
Mobility
controller
Mobility
controller
192.168.10.0 192.168.20.0 192.168.30.0
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