端口限速 
限制上传速度(应用到内网接口)
set firewall family inet filter upload-limit term 0 from source-address 192.168.0.16/32
set firewall family inet filter upload-limit term 0 then policer upload-1mb
set firewall family inet filter upload-limit term 0 then accept
set firewall family inet filter upload-limit term 1 from source-address 192.168.0.0/24
set firewall family inet filter upload-limit term 1 then policer upload-9mb
set firewall family inet filter upload-limit term 1 then accept
set firewall family inet filter upload-limit term 2 then accept （其它网段不限速）
set firewall policer upload-1mb if-exceeding bandwidth-limit 1m
set firewall policer upload-1mb if-exceeding burst-size-limit 625k
set firewall policer upload-1mb then discard
set firewall policer upload-9mb if-exceeding bandwidth-limit 3m
set firewall policer upload-9mb if-exceeding burst-size-limit 625k
set firewall policer upload-9mb then discard 应用到内网接口
set interfaces vlan unit 100 family inet filter input upload-limit
限制下载速度（应用到内网接口）
set firewall family inet filter download-limit term 0 from destination-address 192.168.0.222/32
set firewall family inet filter download-limit term 0 then policer download-1mb
set firewall family inet filter download-limit term 0 then accept
set firewall family inet filter download-limit term 1 from destination-address 192.168.0.0/24
set firewall family inet filter download-limit term 1 then policer download-9mb
set firewall family inet filter download-limit term 1 then accept
set firewall family inet filter download-limit term 2 then accept （其它网段不限速）
set firewall policer download-1mb if-exceeding bandwidth-limit 1m
set firewall policer download-1mb if-exceeding burst-size-limit 625k
set firewall policer download-1mb then discard
set firewall policer download-9mb if-exceeding bandwidth-limit 3m
set firewall policer download-9mb if-exceeding burst-size-limit 625k
set firewall policer download-9mb then discard 应用到内网接口
set interfaces vlan unit 100 family inet filter output download-limit