you can get an IP address from the modem via wireless, but can't go to internet? if so, maybe you can try to manually change the DNS on the wireless client to “8.8.8.8" to have a try.

hi , i think SM321B can't compatible with MC11CS,, because the speed which they can support is different.

i think maybe it's fault one, you can contact dealer to get a replacement firstly ,, also maybe you can give out the topology , maybe other reason make it crash.

change the modem to bridge mode, Disable the DHCP function on it, then configure the WAN connection type to the PPPOE or Dynamic IP(according to your real environment)

i think no need do any configuration if you just want it act as router,, if you replace the router as a PC, the PC can get an IP address from the modem properly??? what's the WAN status? (you can...

hi there, Don't know what's the software? i think setup a IPsec VPN easily. create IKE create IPsec... maybe you can try to setup it.