Hi,
I connected two EX4650 in MC-LAG, with different ICCP & ICL aggregation link, Configured VRRP for each IRB after that while we connected two MC-LAG client which also an EX switch and while traceroute from one client to another, always traffic flow from backup router instead of Primary/Master device.
Topology attached for your reference.
------------------------------
SURAJ SINGH
------------------------------