User manual NETGEAR NMS100 REFERENCE MANUAL

[. . . ] Reference Manual for the ProSafe Network Management System NMS100 NETGEAR, Inc. 4500 Great America Parkway Santa Clara, CA 95054 USA 202-10058-01 September 2004 September 2004 202-10058-01 © 2004 by NETGEAR, Inc. September 2004. Trademarks NETGEAR is a trademark of Netgear, Inc. SNMPc, SNMPc Workgroup, SNMPc Enterprise, and Castle Rock Computing are trademarks of Castle Rock Computing. [. . . ] The polling agent will generate alarms if a polled value exceeds the baseline by a preset percentage. Use manual threshold alarms in trend reports to specify a particular condition to test. In this case the alarm condition is well known to the user and involves a longer polling period (for example, 80% over 10 minutes). Alarm Type Status Variable Polling Automatic Trend Baseline Manual Trend Threshold Polling and Emailing September 2004 202-10058-01 4-1 Reference Manual for the ProSafe Network Management System NMS100 Setting Status Variable Polling · Using the Map Selection Tree or a Map View window, right-click on an SNMP Device, Link, or Network object and use the Properties menu. You can optionally append a UDP port number to the address as x. x. x. x. Port. For a regular SNMP V1 device, set Read Access Mode to SNMP V1 and set Read Community to a valid community name. Set the Status Variable to the name of an Integer SNMP variable including an instance (e. g. , ifOperStatus. 3). Set the Status Value to the Numeric value for your comparison (or one of the pull-down aliases). Set the Status OK Expr to the test performed to determine if the status test passes. Use the Value pull-down list for possible tests. · · · · · · · · Note: For variables that have a textual instance part, you can use the form statusVar. "text instance" rather than full SNMP dot notation. Configuring Automatic Alarms Use the Config/Trend Reports menu and select the Automatic Alarms tab. You can set various parameters of the automatic alarm algorithm in this dialog. Generally the default settings are adequate and the main thing you might want to do is disable automatic alarms by clearing the Enable Automatic Alarms check box. 4-2 September 2004 202-10058-01 Polling and Emailing Reference Manual for the ProSafe Network Management System NMS100 Setting Manual Threshold Alarms You must first create a trend report for a set of devices and an SNMP MIB Table. Please refer to Saving Long-term Statistics for a description of creating trend reports. Select the report name in the Trend Selection Tree and use the right-click Properties menu, then use the Instances button. Select one or more rows in the displayed table and click the Add button to add them to the Instances Tree at the left. In the Instances Tree, select one or more labels (including <All Other Instances>) and click the Include or Exclude button. For each included instance, use the Edit button to add alarms for each variable. Select a variable name from the list at the bottom of the Instance Edit dialog. This is an operator (>, <, =, >=, <=, !=) and a numeric constant. You can also optionally enter a name for this variable instance in the Instance Name edit box. You will see a red exclamation mark next to the icon in the Instances Tree for any instances that have manual alarms. Please keep in mind that for Counter variables, the values you set in the manual threshold will be compared against a polled sample. The polled sample will be larger or smaller depending on the trend report poll interval. [. . . ] In this case, a part of the host address is reserved to identify the particular subnet. The full address is: 10010110. 11010111. 00010001. 00001001 The Class B network part is: 10010110. 11010111 and the host address is 00010001. 00001001 If this network is divided into 14 subnets, however, then the first 4 bits of the host address (0001) are reserved for identifying the subnet. The subnet mask is the network address plus the bits reserved for identifying the subnetwork. (By convention, the bits for the network address are all set to 1, though it would also work if the bits were set exactly as in the network address. ) In this case, therefore, the subnet mask would be 11111111. 11111111. 11110000. 00000000. [. . . ]