Bridge Mode Update for SB2+ WiFi Modem Via
DavidBrowserGuy"Bridging fans beware! There is a limited number of IPs that are issued to any single modem, so if you have more than just a couple of devices and most likely you do, you may start running into some really weird and hard-to-debug behaviors. Router mode is recommended."
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In other words, use a single router, and turn off SB2+ WiFi broadcasting...