IP QoS settings for enterprise-level Routers

In enterprise-level routing settings, we often encounter the IP QoS function configuration, so in order to let everyone better understand the configuration process, the following is an example of TL-R480T. After the R480T software is upgraded, the following content is added ":

The QoS Set interface is described as follows:

QoS Set has two parameters: "upstream bandwidth" and "downstream bandwidth". Click "help" to view the following information:

The "upstream bandwidth" and "downstream bandwidth" can be understood as the actual downstream bandwidth of the bandwidth line applied by the user. For example, the upstream bandwidth of the ADSL line is 5 to 12 kbps, and the downstream bandwidth is 2 Mbps, in this case, you can enter ..

As mentioned above, it is emphasized that you must enable the "enable QoS" switch and fill in the actual upstream and downstream bandwidth of the line before continuing configuration on the IPQoS page. Otherwise, an error is prompted.

The following is an example of IP QoS settings:

1) "address segment" -- contains a total of 11 IP addresses from. 10 to. 20. In addition, the CIDR Block allows you to enter IP addresses that are not in the same CIDR block as the IP address of the router LAN port. This means that if the user's intranet uses a layer-3 switch device to plan different subnets, our routers can also support bandwidth restrictions on IP addresses of different network segments.

2) "Mode"-independent bandwidth. As the name suggests, the "maximum bandwidth" and "minimum bandwidth" are for each IP address in this IP address, if you select "shared bandwidth" in the mode, that is, the parameters under the IP address sharing.

3) "upstream/downstream"-we all know that data streams transmitted over the network are oriented. For example, BT Downloads can download data from servers on the Internet and upload data as servers, the IP QoS of our vro is restricted based on this "Directional Data Stream.

The router accurately separates upstream and downstream data streams. Assume that the host with the IP address 192.168.1.10 is downloading BT, the data traffic of this host will be large. The data flow of this host is divided into two parts: one is that it downloads data from another server, and the other is that it uploads data to another host. The IP QoS of the vro limits the traffic for downloading and uploading the. 10 host.

According to the above parameters ,. 10 hosts upload data in the upstream direction) the minimum data traffic is guaranteed to be 50 Kbps, the maximum bandwidth cannot exceed Kbps, and data is downloaded in the downstream direction) the minimum data traffic guarantee is 100 Kbps, and the maximum bandwidth does not exceed Kbps. The available bandwidth of upstream and downstream data is based on the actual/downlink bandwidth of the line.

If. these 11 hosts are downloading data, while the actual downstream bandwidth of the line is limited to 2 Mbps, and bandwidth contention may occur, according to the parameter router we set above, we must first ensure that the downstream data of each IP address uses a minimum bandwidth of kbps, so 11 hosts use a total of kbps of Bandwidth Resources, the total downstream bandwidth of this line is 900 Kbps, and the remaining bandwidth is about Kbps. How can I allocate the remaining bandwidth resources of Kbps? In this way, we can understand the route bandwidth allocation of the vro for the remaining kbps. For example, if 11 hosts are competing for the remaining kbps bandwidth, then "in the first round of competition, 11 hosts divide the bandwidth of kbps equally. "After the first round of competition, two of the 11 hosts are enough to transmit without extra bandwidth after using the minimum bandwidth of kbps, the two hosts withdrew from the competition and only the remaining nine hosts continued to compete. In the second round of competition, the bandwidth of kbps was evenly allocated to the nine hosts.

As marked in red, if the downlink bandwidth of the line is 10 Mbps, the "downlink bandwidth" of the two hosts with 192.168.1.10 and 192.168.1.11 is at least 100 Kbps, the maximum bandwidth is 2000 Kbps and Kbps respectively, so when the bandwidth is allocated:

The router first ensures that the "downstream bandwidth" of the two hosts can be used at least 100 Kbps. After the minimum bandwidth guarantee, the two hosts further need downstream bandwidth. After the traffic exceeds kbps, the router will use the "Round Robin" method to increase the effective bandwidth occupied by the two hosts, when the bandwidth occupied by the downstream data flow of the host 192.168.1.10 reaches kbps, the router will not forward packets exceeding kbps bandwidth. However, when the bandwidth of the host is competing for 192.168.1.11, the host still needs a larger bandwidth after the data stream reaches kbps, And the vro will continue to increase the valid downstream bandwidth it occupies to kbps, packets that exceed the bandwidth range will no longer be forwarded. The remaining 7 Mbps downstream bandwidth resources will be idle and will not be allocated to. 10 and. 11. They will not be available unless their maximum available "downstream bandwidth" is changed to a larger value. When configuring IP QoS, select "shared bandwidth" as "Mode", which is the maximum and minimum bandwidth of the upstream and downstream settings for all IP addresses in the IP address segment.

We have used a long term to describe the use of the new IP QoS functions of enterprise-level routers. Does it seem complicated? However, even if you are not familiar with the network, you only need to follow the steps below to set up your network:

① Manually specify the IP address of the computer on the Intranet, which is continuous, for example, 192.168.1.2 ~ 192.168.1.100 to facilitate subsequent settings;

② Set the bandwidth of your line at the ip qos settings switch, respectively set the uplink bandwidth and downlink bandwidth of the line, such as 10 m optical fiber lines need to be filled in

10000; then enable the QOS master switch;

③ Enter the ip qos rule settings page, add new entries, and set:

The IP address segment is 192.168.1.2 ~ 192.168.1.100;

Select "independent" as the mode ";

Uplink minimum bandwidth: the actual uplink bandwidth of the line/number of Intranet computers. In this example, the bandwidth is 10000/99 = 101.

Recommend setting 800, 1000, or 2000;

Downlink minimum bandwidth: the actual downlink bandwidth of the line/number of Intranet computers. In this example, the bandwidth is 10000/99 = 101.

Recommend setting 800, 1000, or 2000;

④ Save and complete the settings.
 

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