Đang chuẩn bị nút TẢI XUỐNG, xin hãy chờ
Tải xuống
Tham khảo tài liệu 'tcp/ip network administration- p11', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 11 11.9 Simple Network Management Protocol useful information for spotting usage trends and potential trouble spots. Every agent supports MIBI or MIBII. Some systems also provide a private MIB in addition to the standard MIBII. Private MIBs add to the monitoring capability by providing system-specific information. Most UNIX systems do not provide private MIBs. Private MIBs are most common on network hardware like routers hubs and switches. No matter what MIBs are provided by the agents it is the monitoring software that displays the information for the system administrator. A private MIB won t do you any good unless your network monitoring software also supports that MIB. For this reason most administrators prefer to purchase a monitor from the vendor that supplies the bulk of their network equipment. Another possibility is to select a monitor that includes a MIB compiler which gives you the most flexibility. A MIB compiler reads in the ASN.1 description of a MIB and adds the MIB to the monitor. A MIB compiler makes the monitor extensible because if you can get the ASN.1 source from the network equipment vendor you can add the vendor s private MIB to your monitor. MIB compilers are only part of the advanced features offered by some monitors. Some of the features offered are Network maps Some monitors automatically draw a map of the network. Colors are used to indicate the state up down etc. of the devices on the network. At a glance the network manager sees the overall state of the network. Tabular data displays Data displayed in tables or rendered into charts is used to make comparisons between different devices. Some monitors output data that can then be read into a standard spreadsheet or graphing program. Filters Filters sift the data coming in from the agents in order to detect certain conditions. Alarms Alarms indicate when thresholds are exceeded or special events occur. For example you may want an alarm to trigger when your server exceeds some .
