Download Essential SNMP by Douglas R Mauro Douglas, Kevin Schmidt, Kevin J. Schmidt PDF
By Douglas R Mauro Douglas, Kevin Schmidt, Kevin J. Schmidt
The easy community administration Protocol (SNMP) is an Internet-standard protocol for handling hosts on an IP community. units that usually help SNMP contain routers, switches, servers, workstations, printers, modem racks, UPSs, and more.Essential SNMP is a pragmatic advent to SNMP for community and process directors. It starts off with the fundamentals of SNMP and the way it really works, in addition to the technical historical past to exploit it successfully. The booklet covers OIDs, MIBs, group strings, traps, and different technical components. however the major concentration is on sensible community management: tips on how to configure SNMP brokers and community administration stations, the best way to use SNMP to retrieve and alter variables on community units, tips to configure administration software program to react to traps despatched through controlled devices.Essential SNMP explores either advertisement and open resource programs, together with HP's OpenView, fort Rock's SNMPc, the Net-SNMP instruments, Simon Leinen's Perl SNMP help, and MRTG. directors will come away with principles for writing scripts to aid them deal with their networks, create controlled gadgets, and expand the operation of SNMP brokers. as well as SNMPv1 and v2, the publication covers SNMPv3, which has simply began to appear in advertisement items as of this printing.
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Additional info for Essential SNMP
4 The set Operation The set command is used to change the value of a managed object or to create a new row in a table. Objects that are defined in the MIB as read-write or write-only can be altered or created using this command. It is possible for an NMS to set more than one object at a time. Figure 2-8. set request sequence Figure 2-8 shows the set request sequence. It's similar to the other commands we've seen so far, but it is actually changing something in the device's configuration, as opposed to just retrieving a response to a query.
The nonrepeaters and max-repetitions are set with the -B 1 3 option. This sets nonrepeaters to 1 and max-repetitions to 3. Notice that the command returned seven variable bindings: one for sysDescr and three each for ifInOctets and ifOutOctets. 4 The set Operation The set command is used to change the value of a managed object or to create a new row in a table. Objects that are defined in the MIB as read-write or write-only can be altered or created using this command. It is possible for an NMS to set more than one object at a time.
Figure 2-4 shows the MIB-II subtree of the mgmt branch. Figure 2-4. MIB-II subtree Table 2-5 briefly describes each of the management groups defined in MIB-II. We don't go into great detail about each group, since you can pull down RFC 1213 and read the MIB yourself. Table 2-5. 1 the system uptime, system contact, and system name. interfaces Keeps track of the status of each interface on a managed entity. 2 interfaces are up or down and tracks such things as octets sent and received, errors and discards, etc.