System Requirements for CoS with DiffServ for IPv6

To implement CoS with DiffServ for IPv6, your system must meet these minimum requirements:

JUNOS Release 8.2 or later for MX-series routers
JUNOS Release 7.2 or later for J-series Services routers
JUNOS Release 6.3 or later for M-series and T-series routers
Three Juniper Networks J-series, 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