juniper 查看占用带宽的命令是？

我也不太清楚，你可以看看下面的对比。

CISCO与JUNIPER命令比较

HI,There,I would like to provide you with CISCO juniper on the CLI,I hope that more and more of my friends about Juniper.
                            /Gavin Cheng

Cisco Command	Juniper Command	Co-Ordinating Definition
show ip interface brief	show interface terse	displays the status of interfaces configured for IP
show interface [intfc]	show interfaces [intfc] detail	displays the interface configuration, status and statistics.
show controller intfc	show interfaces intfc extensive	displays information about a physical port device
show interface | incl (proto|Desc)	show interfaces description	displays the interface configuration, status and statistics
show ip route	show route	displays summary information about entries in the routing table
show ip bgp summary	show bgp summary	displays the status of all Border Gateway Protocol (BGP) connections
show ip bgp net mask	show route protocol bgp prefix	will show you how that route is being advertised, look for the first line
show ip bgp net mask longer-prefixes	show route range prefix	will show you how that route is being advertised, look for the first line
show ip bgp regexp AS-regexp	show route aspath-regexp "AS-regexp"	displays routes matching the autonomous system (AS) path regular expression
show ip bgp neighbors neigh received-routes	show route receive-protocol bgp neigh show route source-gateway neigh protocol bgp	Shows whether a neighbor supports the route refresh capability
show ip bgp neighbor neigh advertised-routes	show route advertising-protocol bgp neigh	Shows whether a neighbor supports the route refresh capabilty
show clns neighbors	show isis adjacency	displays both ES and IS neighbors
show clns interface	show isis interface	shows specific information about each interface
show ip route isis	show isis routes	displays the current state of the the routing table
show isis topology	show isis spf	displays a list of all connected routers in all areas
show ip ospf interface	show ospf neighbor	shows neighbor ID, Priority, IP, & State if the neighbor router, dead time.
show ip ospf interface	show ospf interface	shows neighbor id, pri, state, dead time, address and interface
show ip route ospf	show ospf route	display the current state of the routing table
show ip ospf database	show ospf database	display list of information related to the OSPF database for a specific communication server
show version	show version, show system uptime	display the system hardware config., software version, and name and source of configuration files and boot images
show diags	show chasis hardware	displays power-on diagnostics status
show processes cpu	show system process	displays utilization statistics
show tech-support	request support info	displays the current software image, configuration, controllers, counters, stacks, interfaces, memory and buffers
show logging	show log messages	display the state of logging to the syslog
show route-map name	show policy name	displayall route-maps configured or only the one specified
show ip prefix-list name	show policy name	display information about a prefix list or prefix list entries
show ip community-list list	configure,   show policy-options community name	display routes that are permitted by BGP community list
show environment all	show chassis   environment	displays temperature and voltage information on the console
ping dest	ping dest rapid (for cisco like output) ping dest (for unix like output)	to check to see if a destination is alive
ping (setting source int)	ping dest bypass-routing	to check to see if a destination is alive
terminal monitor	monitor start messages	Change console terminal settings
terminal no monitor	monitor stop	Change console terminal settings
terminal length 0	set cli screen-length 0	sets the length for displaying command output

Juniper ScreenOS是get命令吧?

用协议分析软件，如科来网络分析系统就可以达到楼主的要求；
科来对流量的分析还是非常全面的。而且提供了免费的技术交流版，楼主不妨去下载试试。

带宽的话你可以到网上搜一下"查看网速"之类的关健字,可以找到一些测试网速的网站,当然啦,你得看是哪个地方对哪个地方的网速,没有谁的网速是对每个地方都一样的,查看带宽被哪个程序占用的话你可以用360试一下,在高级里边有一个网络连接状态,里边可以看到哪些程序在使用网络资源,这只是我知道的,也许还有更好的方法,希望对你有所帮助

用常用的代理软件CCProxy为例，对用户带宽进行限制。具体用法自己找找

下载一个P2P 网络终结者 可以看到自己的宽带占用和同一个局域网的速度,也可以限制其他人的速度,慎用,不过别人装了ARP防火墙就对别人限制速度无效 你本机装了ARP防火墙那P2P就完全无效
参考资料：http://www.gbdown.com/SoftView/SoftView_1222.html

不知道你是什么机房的
现在idc基本都提供mrtj流量监控的
联系机房技术人员可以查看的