Gather information – Gather information from the trouble ticket, users, or end systems affected by the problem to form a definition of the problem. There are five steps to gathering information: Troubleshooting with a systematic approach
show ip interface brief (show ipv6 interface brief). Useful command for network documentation: Analysis must be conducted regularly to understand how the network is affected by growth and other changes. Perform an annual analysis of the entire network or baseline different sections of the network on a rotating basis. Baseline analysis of the network should be conducted on a regular basis. Generally, a two-to-four-week baseline is adequate.īaseline measurements should not be performed during times of unique traffic patterns, because the data would provide an inaccurate picture of normal network operations. Typically, a baseline needs to last no more than six weeks, unless specific long-term trends need to be measured. For this reason, when capturing data for analysis, the period specified should be, at a minimum, seven days long. It is also important to monitor for trends that occur over a longer period of time, such as weekly or monthly. It is important that daily trends of network traffic are monitored. The length of time and the baseline information being gathered must be sufficient for establishing a typical picture of the network. Remember that an interface on a router or switch can be a virtual interface, such as a switch virtual interface (SVI). The ports of interest include those ports on R1, R2, and R3 that connect to the other routers or to switches, and on R2, the port that connects to SRV1 (G0/0).īy shortening the list of ports that are polled, the results are concise, and the network management load is minimized. The devices of interest include PC1 (the Admin terminal), and SRV1 (the Web/TFTP server). For example, in Figure bellow the network administrator has highlighted the devices and ports of interest to monitor during the baseline test. Anything else considered critical to operationsĪ logical network topology diagram can be useful in identifying key devices and ports to monitor. Network device ports that connect to other network devices. Use the network topology to identify those devices and ports for which performance data should be measured. (Cisco Wide Area Application Services (WAAS) software) Some good starting measures are interface utilization and CPU utilization. Start out simply and fine-tune along the way. If too many data points are selected, the amount of data can be overwhelming, making analysis of the collected data difficult. When conducting the initial baseline, start by selecting a few variables that represent the defined policies. To plan the first baseline, perform the following steps: Establishing a network performance baseline requires collecting performance data from the ports and devices that are essential to network operation. A baseline performance level: A baseline is used to establish normal network or system performance. #Solarwinds network topology mapper throttle software
For this reason, having a sample baseline record of the hardware and software used on devices, and recorded in end-system documentation can be very useful when troubleshooting. An incorrectly configured end system can have a negative impact on the overall performance of a network. Any additional important information about physical aspects of the deviceĮnd-system configuration files focus on the hardware and software used in end-system devices, such as servers, network management consoles, and user workstations.If it is a modular device, include all module types and in which module slot they are located.Location of the device (building, floor, room, rack, panel).Information that could be captured within a device table includes:.Within the network configuration files a table should exist for each network device used on the network, containing all relevant information about that device. Network configuration files contain accurate, up-to-date records of the hardware and software used in a network.Configuration files, including network configuration files and end-system configuration files.To monitor and troubleshoot a network, network administrators must have a complete set of accurate and current network documentation.
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