How to setup broadcsat/multicast address for SoftAp0

Hi all,

Here is the SoftAP0 using ifconfig:

SoftAp0 Link encap:Ethernet HWaddr 50:65:83:d9:f9:0f
inet addr:192.168.8.1 Bcast:192.168.8.255 Mask:255.255.255.0
inet6 addr: fe80::5265:83ff:fed9:f90f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1384 errors:0 dropped:1 overruns:0 frame:0
TX packets:979 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:137122 (133.9 KiB) TX bytes:457845 (447.1 KiB)

I use my laptop to join the SoftAP0, and it goes through fine. The I try to ping using multicast/boradcast addresses, it times out. What should I do to make it works?

Thanks,
Henry