How does centrally-switched wireless handle broadcasts?

[alanjhunt]

I'm not sure about how broadcasts are handled in a centrally-switched (not FlexConnect) environment. Our network has large /22 networks for wireless users...in a traditional wired world, that's a big broadcast domain. Add multiple /22 networks in an interface group and it's even bigger. Is this a concern? Will wireless clients really process broadcasts from these networks as wired clients would?

[Scott Fella]

The WLC does not forward broadcast unless you have broadcast forwarding enabled on the WLC.

http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/secwlandg20/sw2dg/ch4_2_SPMb.html#wp1307340

The WLC by default does not forward broadcast messages from WLAN clients back out onto the WLAN, which prevents a WLAN client from acting as a DHCP server and spoofing incorrect DHCP information.