Juniper Sub Interface Bandwidth Limit
#set firewall policer 20mb if-exceeding bandwidth-limit 20m
#set firewall policer 20mb if-exceeding burst-size-limit 2m
#set firewall policer 20mb then discard
[20mb is policer name. unit 100 is sub interface. burst size should be 10% of bandwidth limit]
[20mb is policer name. unit 100 is sub interface. burst size should be 10% of bandwidth limit]
#set interfaces ge-1/0/0 unit 100 family inet policer input 20mb
#set interfaces ge-1/0/0 unit 100 family inet policer output 20mb
[Call 20mb policer to your desire interface]
[Call 20mb policer to your desire interface]