If using hub as core switch device in the network, the network utilization should be lower for the increasing collisions. Through monitoring network utilization, we can understand whether the network is idle, normal or busy. It also helps us to set proper benchmark and troubleshoot network failures.
How to Analyze Network Utilization Rate. Summary Network utilization is the ratio of current network traffic to the maximum traffic that the port can handle.
Why is the network utilization low? How to increase network utilization? In the Summary tab we can get a quick view of the real-time network utilization of many statistic types. For stations, Ethernet frames start experiencing more delay than token ring frames at 49 percent load, instead of the 37 percent load for 50 stations.
Armed with this knowledge about the IEEE study, you can help your customer understand which, if any, maximum network-utilization goals for shared Ethernet are appropriate. Consider the case of an Ethernet segment that is shared by only two stations: a client that sends requests and a server that responds after receiving requests. In this case, is it a problem if network utilization exceeds 37 percent? There are no collisions because the server and client never try to send at the same time, so the 37 percent rule, which is concerned with collisions, does not apply.
The load should be almost percent unless the client or server is slow. For an interesting discussion of how inappropriate it is to insist on a 37 percent rule for shared Ethernet utilization, refer to "Measured Capacity of an Ethernet: Myths and Reality," by David R. Boggs, Jeffrey C. Mogul, and Christopher A. This paper shows that "for a wide class of applications, Ethernet is capable of carrying its nominal bandwidth of useful traffic, and allocates bandwidth fairly.
If configured for full-duplex operations, a point-to-point Ethernet link supports simultaneous transmitting and receiving. However, bandwidth in both directions isn't used all the time, in most cases. You may hear vendors or even other network engineers proclaim that full-duplex Fast Ethernet means that there's Mbps available and that full-duplex Gigabit Ethernet means that there's Mbps available, and that percent of this bandwidth can be utilized.
Although this is theoretically true, percent utilization doesn't occur in most cases. Consider the client talking to a server again. The client sends requests and the server responds, in lock step. The client doesn't try to send at the same time as the server, so the bandwidth usage does not double on the client's link to the Ethernet switch. A point-to-point link that connects a switch to a server or to another switch, on the other hand, could use all the bandwidth, depending on traffic patterns.
If the utilization exceeds about 70 percent, then it's probably time to upgrade to more bandwidth. Non-business Related Activity - In many cases, non-core activities occurring within the business are found to be the culprit of high network utilization. Casual web surfing, Internet radio streaming, and viruses that have infected machines on the network can steal precious network resources and cause problems with critical business functions.
Factors that affect network utilization and the performance of the network fall into a few major categories. The type of software that you purchase will depend greatly on what the needs of the dealership are. Some of the keys items to consider when purchasing or outsourcing network utilization tools are:. Current Problems - This could include lag on the network, network crashing or inconsistent network availability, or a possible virus. Future Problems - Make sure the product will support future plans, such as additional users, network changes, etc.
Bandwidth monitoring - Can the tool monitor the bandwidth that is available keep in mind this may not equal exactly what you signed up for. Many factors effect this number. In a situation where the network monitoring is outsourced, the dealership needs the option to monitor the reporting, change any network settings, etc. If these features are not available, the dealership should construct and SLA specifying a pre-defined list of report dates, etc.
In an effort to reduce latency due to excessive traffic or other contributing factors it is important that certain steps be taken. For example, ensure a proper network infrastructure layout has been established. If that is not possible, review the current infrastructure and determine which areas can be enhanced or re-engineered to improve performance.
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