That is plain wrong. Usually you only connect 1 cable downstream if you have 1 switch and 2 if you have a stack. or two main switches for fault tolerance.
The behavior is not different in an access port or a trunk port. However there is one setting that must be avoided in most situations and that is the 'drop untagged traffic' settings since that effectively also drops STP BPDU's and can cause a loop. So always use a native VLAN that is available on the switch side.
So i can go with my topology and there's no challenge in it ?. What if one of the uplink and one Lan cable fails [example vlan 10] from primary Mx ?. Will it fails inspite of Secondary uplink active on Primary Mx
So it means for MX to be failover either both lan or Wan uplink should fail ?. Also if I configure trunk port of vlan 10 and 20 instead of access port, will it do failover if primary MX lan (trunk) port goes down with active Uplink ?
Independent of your topology failovers will happen in two scenario's. 1) Both WAN's are down in the primary (in this case the primary MX will send a VRRP message that excludes the primary firewall as active forwarder). 2) The spare unit no longer gets any VRRP messages from the primary. ( if the active firewall is still there then you will have an active active scenario with instability as effect ).
