https://www.juniper.net/documentation/en_US/junos/information-products/pathway-pages/qfx-series/traffic-management.pdf
How Many Policers Are Supported?
QFX10000 switches support 8K policers (all policer types).
QFX5100 and QFX5200 switches support 1535 ingress policers and 1024 egress policers (assuming one policer per firewall filter term).
QFX5110 switches support 6144 ingress policers and 1024 egress policers (assuming one policer per firewall filter term).
root@QFX5110-2# set firewall policer 2G-limit if-exceeding bandwidth-limit ?
Possible completions:
<bandwidth-limit> Bandwidth limit (8000..50000000000 bits per second)
class-of-service {
interfaces {
xe-0/0/46 {
shaping-rate 2g;
}
firewall {
family ethernet-switching {
filter 2G-limit {
term 1 {
then policer 2G-limit;
}
}
}
policer 2G-limit {
if-exceeding {
bandwidth-limit 2g;
burst-size-limit 1250k;
}
then discard;
}
}
xe-0/0/46 {
unit 0 {
family ethernet-switching {
vlan {
members V3000;
}
filter {
input 2G-limit;
}
}
}
}