@cmr wrote: Not that it is a solution, but I've always advocated using L2 unmanaged switches for WAN splitting for two reasons: 1) what you've seen here where perhaps some tags are clashing 2) as the switch is completely unprotected, best to have something that can't be hacked... Thanks. Understood. That's likely my solution - replace with something simpler. I used these Unifi switches because they were perfect for this purpose; tiny 5-port switch, powered over PoE so can be powered from a single MX LAN port and used for both management and power, visibility into traffic stats (not very detailed, just basic throughput and volume), troubleshooting, and I happened to have some lying around. Oh well.
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