Multichassis Link Aggregation in a Virtual Chassis
Starting in Junos OS Release 13.3, you can configure multichassis link aggregation (MC-LAG) in an MX Series Virtual Chassis.
MC-LAG enables a device to form a logical link aggregation group interface with two or more other devices. The MC-LAG devices use the Inter-Chassis Communication Protocol (ICCP) to exchange control information between two MC-LAG network devices.
When you configure MC-LAG with an MX Series Virtual Chassis, the link aggregation group spans links to two Virtual Chassis configurations. Each Virtual Chassis consists of two MX Series member routers that form a logical system managed as a single network element. ICCP exchanges control information between the global master router (VC-M) of the first Virtual Chassis and the VC-M of the second Virtual Chassis.
To configure MC-LAG on member routers in a Virtual Chassis, use the same procedure that you would use to configure MC-LAG on a standalone MX Series router.
Internet Group Management Protocol (IGMP) snooping is not supported on MC-LAG interfaces in an MX Series Virtual Chassis.