Good point.
Thank you. The routers got the correct IP Passthrough address. If they didn't, and got a private IP, (service was actually restored). When the correct passthrough address is assigned to the router, this results in no service. Only restarting the broadband on the gateway resolves this. AND it happens every time the 3rd party router reboots.This information is no help?
Configuring IP Passthrough and DMZplus
When configured for IP Passthrough (Passthrough Mode) the AT&T provided gateway shares its Dynamic WAN IP address with a single device on the LAN.www.att.com
More few DSLReport members migrated to Broadbandbulletin.com when DSLReports went offline. Perhaps their ATT subform may have some information or suggestions if it's a ATT router config issue.
Unfortunately I can't confirm or deny that it doesn't work. The main connection to the closet com box includes the house alarm. While I can simply move it to the BGW320 gateway, it is on another subnet, and when I move it back to a third party router I usually have to go upstairs and power cycle the three switches in the closet to get most back online, but not all. (It's a real pain so I try to avoid it). I did notice that the default rate of checking is something like 3 seconds, so I changed it to 1 minute and 2x before failover, and 2x before fallback. I can't imagine Google DNS (what I choose) being pinged every 3 seconds by thousands of ASUS routers out there....Known issue. The reason I can't recommend ASUS routers for Dual WAN. They have it as check box feature, but it's unreliable. Not sure why is it happening even on expensive latest and greatest ASUS devices when a $60 wired router like Omada ER605 can do 3x Ethernet WAN connections with no issues.
