[原创] 接入路由器做NAT，做限速的一些想法...

一般接入路由器都作了地址转换，但是了解到路由器的操作步骤会发现如下的执行步骤： check input rate limits ------->nat outside to inside------->check output rate limits 所以针对内部部分主机做限速策略，由于必须在ACL里面指定inside local 地址，所以应该在内网接口上应用service-policy output xxx，而不是在外网接口上的service-policy input xxx！ 下面是一个具体的例子： Router#sh run Building configuration... Current configuration : 1026 bytes ! version 12.2 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Router ! ! ip subnet-zero ! ! no ip domain lookup ! ! class-map match-all test-class match access-group 100 ! ! policy-map speed class test-class police cir 80000 bc 32000 conform-action transmit exceed-action drop ! ! ! ! ! interface FastEthernet0/0 ip address 192.168.1.111 255.255.255.0 ip nat outside duplex auto speed auto ! interface FastEthernet0/1 ip address 172.16.1.1 255.255.255.0 ip nat inside duplex auto speed auto service-policy output speed ! ip nat inside source list 1 interface FastEthernet0/0 overload ! ip classless ip route 0.0.0.0 0.0.0.0 192.168.1.1 no ip http server ! ! access-list 1 permit any access-list 100 deny ip any host 172.16.1.100 access-list 100 permit ip any any ! line con 0 line aux 0 line vty 0 4 ! ! end Router# 最后的效果，可以达到限制内网除172.16.1.100的其他主机的下行速率在10KBps附近 最后，提一下，那如果想限制内网部分主机的上行速率呢？大家自己举一反三吧