Solution AX1800 Devices cannot communicate with each other over LAN
Got my AX1800 last week, and did not notice until today that several of my devices cannot communicate with each other across the LAN, though they could on old router (and still can during testing). All devices can get internet, and via the internet I can connect across the devices (Chrome Remote Desktop), they can all ping the router, ping from the router, and can ping certain devices on the LAN as well.
Firmware Version: 1.3.0 Build 20210304 rel.16262(5553)
Hardware Version: Archer AX20 v1.20
IP Address: 192.168.1.1
Subnet Mask: 255.255.255.0
I have duplicated this with quite a few devices, various tablets, TVs, Alexa, ect, some other devices work while many do not, but for simplicity I am going to list 4 devices and their details:
PC 1: 192.168.1.15 (statically assigned IP, this is a media server I want to be able to connect to directly on all devices)
PC 2: 192.168.1.186 (DHCP, desktop computer)
PC 3: 192.168.1.217 (DHCP, desktop computer)
Cell Phone: 192.168.1.238 (DHCP, wireless only)
-PCs 1-3 cannot ping each other at all. All have internet, all can ping the router. The router can also ping them.
-PCs 1-3 are all wired devices, but I have tested 1 & 2 on wireless as well with no changes.
-I have changed the IP address on PCs 1 and 2 with no changes.
-PCs 1-3 can all ping the cell phone (and a few other wireless devices, though not all wireless devices on network). The cell phone can also ping the PCs.
-I have rebooted all devices in question, even the cell phone just to see if it stopped working, and including the router itself, but nothing has changed.
-Going through my modem from my ISP and using DHCP through there these devices can ping each other without any issues.
The most consistent thing I have found through my testing is which devices are affected, but while one Galaxy S21+ works another does not, even though both are on the same 5G network, all 3 wired devices are affected and about 3/4 of the wireless devices have the issue as well, so issue cannot be narrowed down to how the devices connect or what kind of device has the issue at all.
I've been going through the router config but not finding anything that would allow me to ping some devices across the LAN but not all. Any ideas? Any information I left out that would be helpful?