Troubleshooting Guide

2-2
Cisco Unified Contact Center Express Servicing and Troubleshooting Guide, Release 7.0(1)
Chapter 2 Simple Network Management Protocol Support
SNMP Basics
SNMP Basics
A network management system (NMS) uses SNMP to exchange management information between
devices on a network. An SNMP-managed network is made up of the following main components:
• Managed devices—Network nodes, each containing an SNMP agent. Managed devices collect and
store information and make this information available using SNMP.
• Agents—Network management software that resides on a managed device. An agent contains local
knowledge of management information and translates the information into a form that is compatible
with SNMP.
• Management stations—Computers on which the NMS is installed and from which system
administrators can retrieve and evaluate information from managed devices.
SNMP Agent and Subagents
The Microsoft Windows SNMP service (referred to as the SNMP Service) provides a framework for
SNMP and provides the SNMP agent that interfaces with SNMP subagents.
SNMP Service starts automatically when the system starts. You can restart or stop the SNMP Service if
a problem occurs or if it did not start automatically.
For more information, see Starting, Stopping, and Confirming the SNMP Service, page 2-9.
For information on configuring SNMP Service, see SNMP Traps, page 2-6.
SNMP Management Information Base
A Management Information Base (MIB) designates a collection of information that is organized
hierarchically. You access MIBs with SNMP. MIBs are made up of managed objects, which are
identified by object identifiers. Managed objects are made up of one or more object instances, which are
essentially variables. MIBs provide status monitoring, provisioning and notification.
The Cisco Unified CCX system supports these MIBs:
• SYSAPPL-MIB—Provides system information, such as installed applications, application
components, product version, processes that are running, and process start time. For more
information, see
SYSAPPL-MIB, page 2-3.
• CISCO-VOICE-APPS-MIB—Contains information about supported SNMP traps. For more
information, see
CISCO-VOICE-APPS-MIB, page 2-6.
• CISCO-CDP-MIB—Provides information about device identifications, CDP running status, CDP
transmitting frequency, and the time for the receiving device to hold CDP messages (time to live).
For more information, see
Cisco Discovery Protocol Support, page 5-1.
Standard third-party MIBs, including:
– Standard Microsoft MIBs, such as MIB II
– Compaq Insight Agent MIBS for Compaq MCS 78xx platforms
– IBM UM MIB for IBM 3xx MCS platforms
SNMP Community Names authenticate access to MIB objects and serve as passwords for SNMP
information. A system can exchange SNMP information only with systems in the same community. For
more information on setting up communities, see
Setting the SNMP Trap Receiver, page 2-8.