We've just bought a used 2860Ln so we can check out 4g speeds.

The setup

• WAN1 DSL TalkTalk VDSL2

• WAN3 LTE/4g Three SIM

• WLAN1 from 2860

• LAN1 Switch > desktop PC + printer

• LAN2 PoE switch > IP camera + AP800 WiFi access point (WLAN2)

The desktop works fine, internet OK, IP cam OK. Can log in to 2860 and AP800.
The WLANs both connect and can log into the IP cam and 2860 but neither have internet.

Any ideas?

Right worked this out. It was a DNS address issue. It was set to an incorrect DNS but I think was still getting some local IP addresses from the cache or the IP bind table maybe.