Manuel, the only gotcha I found (that I haven't seen reported) was that
I can't select the 802.11a channels - just Auto - as the dropdown only
has channels 1-14.
FWIW, I've tried both a Soekris 4511 and WRAP 2C with a 2511MP+ EXT2/CM9
and 2511 miniPCI/CM9 respectively and it all seems to work just fine.
Below is the step by step I used to verify the 802.11a functionality on
the WRAP board. My approach was to make the 'b' card be an 802.11b
client to my main AP hooked to the internet and I let the ethernet port
be LAN and configured the CM9 to ba an AP. After the following config
steps I could connect to the CM9 on channel 36 and surf the net as
expected (i.e. my laptop connected via its 802.11a/b card to the CM9 on
the wrap board which then routed packets to the 2511 card which was
associated with my main AP).
Here are the steps:
+ downloaded the WRAP version of m0n0wall, wrap-1.2b5.img
+ installed the CF and two radio cards
+ plug a cable into the (only) ethernet port
+ wait for DHCP to assign via ethernet
+ logged in via ethernet at 192.168.1.1
Enable both radios
+ clicked on Interfaces -> assign
+ clicked on the (+) circle
Configure so 'b' radio is a client to my AP
+ made WAN be wi0
+ made OPT1 be ath0
+ clicked Save
+ clicked on Interfaces -> WAN
+ right at the bottom under Wireless Config, set Mode to BSS, put in the
SSID of my main AP, unchecked "block private networks"
+ click Save
Configure so 'a' radio becomes new AP
+ click on Interfaces -> OPT1
+ check 'Enable Optional 1 interface'
+ set IP to 192.168.2.1
+ set 'Standard' to 802.11a, Mode 'Host AP', SSID 'socalfreenet/aa',
Enable DHCP on OPT1
+ Click Services -> DHCP Server
+ Click the OPT1 tab
+ check "Enable DHCP server on OPT1 interface"
+ Set Range to 192.168.2.100 - 192.168.2.200
Add a rule to allow OPT1 access to WAN
+ Click on Firewall -> Rules
+ Click on LAN
+ Click on (+) next to existing LAN rule to clone it
+ change Interface to OPT1
+ change Source to OPT1 subnet
+ Change Description to "Default OPT1 -> any"
Reboot: Diagnostics -> Reboot -> Yes
Hope this helps! michael