Asus AIMesh Guest network issues

natewin

New Around Here
Another data point.

AX86U router and a second AX86U as node, both running merlin 386.4. Directly connected Ethernet backhaul (no switches) on 2.5gbps ports. Guest network 1 @ 2.4ghz with IoT devices connecting just fine on both router and node and getting 101.x IP addresses.

I have experienced the issue of failing to connect to the guest network and get an IP (unless the allow intranet access was enabled) on some prior alpha (386.2 alpha 2) version and concluded the iptables entries had been hosed by one of those earlier firmware builds and was blocking the dhcp flow. There was a fix for broken firewall rules in 386.2 beta 2, so after updating I ended up completely resetting and re-configuring the router and node and guest network with intranet access disabled worked again.

Some comments on the topic here: http://www.snbforums.com/threads/new-ax86u-node-and-iot-devices.71002/post-671422. Notice this also occurred on my AC5300 that I was in the process of replacing with AX86U's so was not device specific but rather firmware.


Figured out how to fix this (again) today. RT-AX86U main and RT-AC86U node.

The 2.5G ports break something with the guest network and INTRANET DISABLED, they lose internet access. If you backhaul on the regular port the issue resolves. Guest network devices can connect to internet with INTRANET DISABLED.

This post: https://www.snbforums.com/threads/rt-ac68p-fios-wan-dropouts-on-386-x.73214/post-727742
Clued me in that it might be port and vlan related. As I didn't have this issue with a AC86U (merlin) as the main router and an AC88U (stock) as a node. (I had to use stock on node as merlin there had this issue, at that point anyway)

I think whatever VLAN options Asus implements via GUI that was at some point fixed for nodes hasn't made its way to the 2.5G port yet.
 

OzarkEdge

Part of the Furniture
Figured out how to fix this (again) today. RT-AX86U main and RT-AC86U node.

The 2.5G ports break something with the guest network and INTRANET DISABLED, they lose internet access. If you backhaul on the regular port the issue resolves. Guest network devices can connect to internet with INTRANET DISABLED.

This post: https://www.snbforums.com/threads/rt-ac68p-fios-wan-dropouts-on-386-x.73214/post-727742
Clued me in that it might be port and vlan related. As I didn't have this issue with a AC86U (merlin) as the main router and an AC88U (stock) as a node. (I had to use stock on node as merlin there had this issue, at that point anyway)

I think whatever VLAN options Asus implements via GUI that was at some point fixed for nodes hasn't made its way to the 2.5G port yet.

I had this issue on my AX86U using the 2.5GbE port for WAN... guest1 WLAN (no intranet access) clients lose Internet access. I have since updated to the June 2022, firmware 49447 and stopped using the 2.5G WAN port... and the issue is gone. HOWEVER, I also have the issue at two other sites NOT using the 2.5GbE port (standalone routers, not yet updated). I'm inclined to conclude that the issue is unrelated to the 2.5GbE port and that it is fixed in the current firmware... I consider it a now-fixed defect in the new guest1 implementation.

I also switched to not using Smart Connect and not using Wireless Mode Auto.

OE
 
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