I am having some connection issues with my BigPipe Smart Modem (VRV9517) when attempting to connect some IOT devices. These devices use WiFi (2.4GHz only). I have band steering enabled on the modem.

I can see the devices are connecting correctly under the 'Overview > Log > Wireless log' page and also the 'Overview > Access Points > Connected Wi-Fi clients' page, however not under the 'Overview > Connected Devices' or the 'Overview > Log > DHCP leases' page.

The DHCP negotiation appears to be working correctly in the log:

May 23 12:43:52 VRV9517 daemon.info dhcpd: DHCPDISCOVER from e0:4f:43:xx:xx:xx (3c00360005513534xxxxxxxx) via br0
May 23 12:43:53 VRV9517 daemon.info dhcpd: DHCPOFFER on 192.168.1.xxx to e0:4f:43:xx:xx:xx via br0
May 23 12:43:53 VRV9517 daemon.info dhcpd: adapter index 17
May 23 12:43:53 VRV9517 daemon.info dhcpd: Reclaiming not used lease 192.168.1.xxx.
May 23 12:43:53 VRV9517 daemon.info dhcpd: DHCPREQUEST for 192.168.1.xxx (192.168.1.1) from e0:4f:xx:xx:xx via br0
May 23 12:43:53 VRV9517 daemon.info dhcpd: DHCPACK on 192.168.1.xxx to e0:4f:43:xx:xx:xx (3c00360005513534xxxxxxxx) via br0
May 23 12:43:53 VRV9517 daemon.info dhcpd: adapter index 17

The devices have LCD displays which show their IP addresses which are displaying the correct IP addresses.

The issue I am having is the server application running on a different device on the network (over ethernet) cannot communicate with these IOT devices. I also can't ping the relevant IP addresses form any other device on the network.

The devices are being detected by the server (discovery is through mdns, which runs on UDP broadcasts).

Interestingly, the issue seemed to resolve on one of the devices after the lease was renewed (could ping the device and connect via server):

May 23 11:36:59 VRV9517 daemon.info dhcpd: arp replies from this address (192.168.1.xxx).
May 23 11:36:59 VRV9517 daemon.info dhcpd: Reclaiming not used lease 192.168.1.xxx.
May 23 11:36:59 VRV9517 daemon.info dhcpd: Wrote 0 class decls to leases file.
May 23 11:36:59 VRV9517 daemon.info dhcpd: Wrote 11 leases to leases file.
May 23 11:36:59 VRV9517 daemon.info dhcpd: DHCPREQUEST for 192.168.1.xx from 6c:0b:84:xx:xx:xx (22001c0018473532xxxxxxxx) via br0
May 23 11:36:59 VRV9517 daemon.info dhcpd: DHCPACK on 192.168.1.xxx to 6c:0b:84:xx:xx:xx (22001c0018473532xxxxxxxx) via br0
May 23 11:36:59 VRV9517 daemon.info dhcpd: adapter index 17

The modem firmware is listed as 'v6.10.15 build16'

Any ideas / suggestions?