The circular dependency in managing the switch isn't a big deal if the switch is only being used to separate and distribute the Internet circuits via VLANs. Once the switch is configured, it should be reachable on the LAN side of the MXs as long as one of the WAN paths is up. If the switch is configured to use a WAN address from one circuit, the switch will be unreachable if that circuit goes down. In any case, when both circuits are down, the MXs will be unreachable, and being able to reach the switch at that point is moot.   I like @cmr's use of two unmanaged switches for the use case being discussed. There is path and device redundancy, and replacing the switch requires no configuration. We have some MS120-8s filling the same role, and there are no practical features that make them worth the price disadvantage.   @typeraj, I'm wondering if the packet loss you saw was related to the 'Uplink IP Conflict' error. Perhaps your primary ISP handed out a DHCP lease to another device, which conflicted with the address you statically assigned? It could also be something simple like a bad cable. ... View more