We are trying to configure a network that assigns IPs via on-box DHCP server. The network will be connected to an unmanaged switch downstream and the physical connections are terminated on specific ports numbers on both cluster nodes as to provide redundancy if one member fails.

Interface is up; however, L2 channels error increasing:

monitor traffic interface interface-name layer-2-headers

monitor traffic interface interface-name no-resolve

The solution is to implement vlan tagging since switch in unmanaged.

Refer to https://www.juniper.net/documentation/us/en/software/junos/interfaces-security-devices/topics/topic-map/security-interface-configuring-vlan-tagging.html#id-configuring-vlan-tagging__d42631e371