Understanding Split and Merge in a Virtual Chassis

https://www.juniper.net/documentation/en_US/junos/topics/concept/virtual-chassis-ex4200-split-merge.html

!!! for 2 members VC no-split-detection needed !!!

no-split-detection

https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/no-split-detection-edit-virtual-chassis.html