Hello,

I have a situation I have not encountered before. I have a fairly simple network VLAN setup. A CHR instance has an interface VLAN numbered 123. It has a LAN Address and a DHCP server to establish this VLAN network.

CHR (Interface VLAN 123) -> CRS Switch -> CRS Switch -> hAP Lite -> Port 3 (Untagged PVID 123) -> Raspberry Pi

The issue is, after exactly 15 seconds, the CHR loses connectivity with the Raspberry Pi. The issue is resolved when I do an ARP ping, but the problem returns 15 seconds after I stop ARP Ping.

What is going on? How do I fix it? I'm experienced with routing, but layer 2 has been a bit of a mystery to me.

Screenshots:
First one is packet loss right as it happens. Second one is connectivity restoration right after I do an ARP Ping.