I have an EX9208 switch running Junos 13.2R5.10. It seems that it doesn't support the jnxVirtualChassisMemberMIB snmp mibs.
I have lots of EX2200, EX3200 and EX4200 switches, and I use the jnxVirtualChassisMemberMIB mibs to monitor virtual chassis status, but also some other interesting values such as Junos release version, device model and serial number.
This doesn't seem to exist on the EX9200 series though. Anyone knows why? Or is this perhaps supported in some newer version of Junos?