User Guide Part 2

Wi-Fi Array
254 Configuring the Wi-Fi Array
z
“Global Settings .11n” on page 273
z
“Advanced RF Settings” on page 275
z
“LED Settings” on page 283
See Also
IAP Statistics Summary
Understanding Fast Roaming
To maintain sessions for real-time data traffic, such as voice and video, users must
be able to maintain the same IP address through the entire session. With
traditional networks, if a user crosses VLAN or subnet boundaries (i.e., roaming
between domains), a new IP address must be obtained.
Mobile Wi-Fi users are likely to cross multiple roaming domains during a single
session (especially wireless users of VoIP phones). Layer 3 roaming allows a user
to maintain the same IP address through an entire real-time data session.
The Layer 3 session is maintained by establishing a tunnel back to the originating
Array. You should decide whether or not to use Layer 3 roaming based on your
wired network design. Layer 3 roaming incurs extra overhead and may result in
additional traffic delays.
Fast Roaming is configured on two pages. To enable the fast roaming options that
you want to make available on your Array, see Step 17 to Step 19 in “Global
Settings (IAP)” on page 260. To choose which of the enabled options are used by
an SSID or Group, see “Procedure for Managing SSIDs” on page 240 (Step 13) or
“Procedure for Managing Groups” on page 249.