Running into a weird issue with my Comet GL-RM1 where it won't get a DHCP lease on one VLAN but works perfectly on another. Both VLANs are set up the same way from a firewall and routing perspective.
Setup:
GL.iNet Comet GL-RM1
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UniFi UCG-Max gateway
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UniFi USW-Lite-8-PoE switch
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Zone-based firewall, both VLANs in the same internal zone
Works fine on VLAN 10 (192.168.10.x); broken on VLAN 99 (192.168.99.x), DHCP range .100-.200 for both.
What happens on VLAN 99:
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Shows up in UniFi client list with a 169.254 self-assigned address
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Packet capture shows the gateway sending ARP requests with no reply from the Comet
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Tried setting a static IP directly on the device — still unreachable, still no ARP reply
What I've ruled out:
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Switch port — Native VLAN 99, Tagged Block All, correct
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DHCP — server enabled, valid range, auto gateway on
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The VLAN itself — plugged a Windows laptop into the exact same port the Comet was on and it pulled a 192.168.99.x address immediately with no issues
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The device — works perfectly on VLAN 10
So the VLAN is fine, the port is fine, the Comet just doesn't seem to like this subnet for some reason. Anyone seen this before?
