System Requirements for CoS with DiffServ for IPv6
To implement CoS with DiffServ for IPv6, your system must meet these minimum requirements:
Junos OS Release 8.2 or later for MX Series routers
Junos OS Release 6.3 or later for M Series and T Series routers
Three Juniper Networks M Series, MX Series, or T Series routers
For M Series routers, Enhanced FPCs capable of supporting DSCPs and, for MF classifiers, Internet Processor II ASICs