Deployment Scenario 4 - L3 Edge Peers:
This deployment consists of multiple WLAN switches connected to a L3 core. APs are
either directly connected to the WLAN switch or over a L2 or L3 device. This
configuration does require L3 tunneling to accomplish seamless roaming. When
Tunneling is used, an extra 20 bytes are added in the headers for encapsulation. To
support these larger frames, you can increase the MTU size on all intermediate ports
and WLAN switch ports. However, if you use tunneling only for IP telephony, or if the
MTU size on all wireless clients can be set to 1480, you do not need to increase the
MTU size in the network.
Scenario