For any enterprise, managing the internal network properly is crucial to ensuring normal business operations, as modern office work has become increasingly dependent on the network.
Once a network issue occurs, the resulting losses can be enormous. To manage a network well, a router’s QoS feature is essential. This article introduces IP-based network management on Huawei routers.
I. QoS has two parameters: upstream bandwidth and downstream bandwidth. Clicking the help button on the page will display information. You can understand upstream and downstream bandwidth as the actual line speeds of the broadband plan subscribed to by the user. For example, if an ADSL line has an upstream of 512Kbps and a downstream of 2Mbps, you would fill in those values here respectively. You must first enable the switch here to turn on QoS and fill in the actual upstream and downstream bandwidth of the line before you can continue configuration on the IP QoS page; otherwise, an error will be prompted.
1. Address Range: This includes a total of 11 IP addresses from .10 to .20. Additionally, the address range allowed here can include IP addresses not on the same subnet as the router’s LAN IP address. This means that if a user’s internal network uses Layer 3 switching equipment with different subnet schemes, our router can also support bandwidth limits for IPs on different network segments.
2. Mode: Independent Bandwidth. As the name suggests, the maximum and minimum bandwidth settings below apply to each individual IP within this address range. If the mode is set to Shared Bandwidth, then this IP range shares the parameters below.
3. Upstream, Downstream: We all know that data flows transmitted over a network have direction. For instance, with BT downloads, data can be downloaded from servers on the Internet, while the host itself also acts as a server uploading data. Our company’s router IP QoS performs restrictions separately based on these directional data flows.
II. The router very accurately restricts upstream and downstream data flows separately. Based on the parameters filled in the diagram above, assume the host with the IP address 192.168.1.10 is performing a BT download. This host’s data traffic will be relatively large, consisting of two parts: one part is data it downloads from other servers, and the other part is data it uploads to other hosts. The router’s IP QoS will impose specified limits on both the download and upload data flows for this .10 host.
III. Regarding the configured parameters, the router must first guarantee a minimum downstream bandwidth of 100Kbps for each IP address. Thus, 11 hosts would use a total of 1100Kbps of bandwidth resources. From the total line downstream bandwidth resource of 2000Kbps, about 900Kbps remains. The router first ensures that two hosts can use a minimum downstream bandwidth of 100Kbps. After this minimum bandwidth guarantee is met, if the two hosts further require more downstream bandwidth for traffic exceeding 100Kbps, the router adopts a polling method and begins to increase the effective bandwidth occupied by the two hosts. When the downstream data flow bandwidth occupied by the host 192.168.1.10 reaches the maximum of 1000Kbps, the router will no longer forward data packets exceeding the 1000Kbps bandwidth.
IV. However, when host 192.168.1.11 is contending for bandwidth and its data flow reaches 1000Kbps, if this host still needs more bandwidth, the router will keep increasing its effective downstream bandwidth up to 2000Kbps, after which it will no longer forward data packets exceeding this bandwidth range.
The remaining 7Mbps of downstream bandwidth resources will be left idle and will not be allocated to .10 and .11. Unless their maximum available downstream bandwidth is changed to a larger value, they will be unable to use the remaining bandwidth. When configuring IP QoS, if the mode