Internet cafes bandwidth is only 20M, there are 200 units within a network PC, it is probably because there are a lot of people using the Thunder download or use tools such as QQ live, PPStream and other P2P software has resulted in the net amount of traffic, far more than 20M. . . The symptoms at this time is the card, card sometimes can not get to log on with QQ, I am here as early as the time when the speed limit has not conducted such a situation arises. . .
Therefore, following the need for a general rate of restrictions on each PC, are doing. We are dealing with have a lot of dropped calls issue, which is done because there is no speed limit caused.
By dis int e1 / 0 look at the internal network traffic, if there is Overruns, then the net flow of most note too, the router address, but come.

[Quidway]dis int e1/0
Ethernet1/0 current state :UP
Line protocol current state :UP
Description : Ethernet1/0 Interface
The Maximum Transmit Unit is 1500, Hold timer is 10(sec)
Internet Address is 192.168.1.1/24
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 000f-e239-0260
Media type is twisted pair, loopback not set, promiscuous mode not set
100Mb/s, Full-duplex, link type is autonegotiation
Output flow-control is disabled, input flow-control is disabled
Output queue : (Urgent queuing : Size/Length/Discards) 0/50/0
Output queue : (Protocol queuing : Size/Length/Discards) 0/500/0
Output queue : (FIFO queuing : Size/Length/Discards) 0/75/0
Last clearing of counters: Never
Last 300 seconds input rate 220900.42 bytes/sec, 1767203 bits/sec, 572.95 pa
ckets/sec
Last 300 seconds output rate 464099.40 bytes/sec, 3712795 bits/sec, 655.10 p
ackets/sec
Input: 4414550 packets, 3834890077 bytes, 4414550 buffers
58297 broadcasts, 2 multicasts, 0 pauses
127451 errors, 0 runts, 0 giants
0 crc, 0 align errors, 127451 overruns
0 dribbles, 0 drops, 0 no buffers
Output:1206335 packets, 871172966 bytes, 1206335 buffers
955 broadcasts, 0 multicasts, 0 pauses
0 errors, 0 underruns, 0 collisions
0 deferred, 0 lost carriers

AR18-2X in the upgrade to the F1707, you can achieve the speed limit on a per-IP address. 1863-1 latest version also supports this feature, order the same.

Internet cafes within the limits of network PC's speed, upload speed of 200K, download speed 300K.
The definition of 192.168.0.1 to 192.168.0.200 in the flow of each host upload
[Quidway] qos carl 1 source-ip-address range 192.168.0.1 to 192.168.0.200 per-address
The definition of 192.168.0.1 to 192.168.0.200 in the flow of each host downloads
[Quidway] qos carl 2 destination-ip-address range 192.168.0.1 to 192.168.0.200 per-address
[Quidway] interface ethernet 1 / 0
------- Limit upstream
[Qudiway-Ethernet1 / 0] qos car inbound carl 1 cir 200000 cbs 200000 ebs 200000 green pass red discard
------ Limited downlink rate
[Qudiway-Ethernet1 / 0] qos car outbound carl 2 cir 300000 cbs 300000 ebs 300000 green pass red discard

Use of display qos car interface detail command to view the internal network traffic.

These are the command-line form. . . If your router has a WEB interface, you can also be configured inside the WEB is very simple here, I will not write!
To explain that not all of the AR18 series can be configured in the WEB, and some older software versions need to be upgraded later to achieve. . . Upgrade method, see here: http://www.goalercn.com/article/article.php?id=1029

Some other regular orders themselves H3C Web site to download a manual look at the command will know!