I realize that this has probably been discussed, but I'm just not able to find it it seems.
I would like to use a second modem as a failover WAN on another port in the event that my main line goes down. I'm using Shibby's AOI builds on a RT-N16, and I have no interest in using both simultaneously, but just as a backup. Any direction or help would be appreciated.
EDIT: Whoops, misspoke. Should make sense now.