mymlact wrote tp-link completely replaced the isolate ssid with guest mode which does the same thing with the addition of disallowing connection to any private network. This seems like a horrible...

@mymlact, yes, it's expected behavior. See the fine manual:

@mymlact, there is no CLI manual. It's a standard (embedded) Linux system. The filesystem is a read-only squashfs file system.

@LinkMeBaby, T2600G-28TS has some more functions such as ARP proxy, VLAN VPN (QinQ), Private VLANs, GARP/GVRP procotols, 1,000 ICMP Snooping Groups instead of 256 as in T1600G-28TS, IP Source Guard...

According to the FAQ I linked to: Go to L3 FEATURES > Static Routing > IPv4 Static Routing and click to load the following page. Enter 0.0.0.0 as the Destination and Subnet Mask, and enter the IP...

@TheKaban, you set up the default gateway using a static route with destination IP 0.0.0.0 and the gateway's IP as next hop. See https://www.tp-link.com/us/support/faq/2123/