Cisco MCS-7825-H3-IPC1, Руководство по обслуживанию

Страница: 147 / 974

C H A P T E R
4-1
Cisco Unified Communications Manager Managed Services Guide
OL-22523-01
4
Simple Network Management Protocol
This chapter gives an overview of Simple Network Management Protocol (SNMP). It contains the
following sections:
•
Overview, page 4-1
• SNMP Versioning, page 4-2
•
SNMP and Cisco Unified CM Basics, page 4-3
• SNMP Basic Commands, page 4-3
•
SNMP Community Strings and Users, page 4-4
• SNMP and Cisco MIBs, page 4-4
•
SNMP Traps and Informs, page 4-5
• SNMP Trace Configuration, page 4-5
•
SNMP Tips, page 4-5
• SNMP Troubleshooting, page 4-6
Overview
Simple Network Management Protocol (SNMP), an application layer protocol, facilitates the exchange
of management information among network devices, such as nodes and routers. It comprises part of the
TCP/IP suite. System administrators can remotely manage network performance, find and solve network
problems, and plan for network growth by using SNMP.
Instead of defining a large set of commands, SNMP places all operations in a get-request ,
get-next-request , get-bulk-request , and set-request format. For example, an SNMP manager can get a
value from an SNMP agent or store a value in that SNMP agent. The SNMP manager can comprise part
of a network management system (NMS), and the SNMP agent can reside on a networking device such
as a router.
SNMP comprises of three parts—SNMP manager, SNMP agent, and MIBs. You can compile the Cisco
MIB with your network management software.
The NMS uses the Cisco MIB variables to set device variables and to poll devices on the internetwork
for specific information. The results of a poll can get graphed and analyzed to help you troubleshoot
internetwork problems, increase network performance, verify the configuration of devices, and monitor
traffic loads.