其实限速肯定是可以的，但是需要考虑一个具体的问题，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。