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