Chapter 6: Log And Trap Fundamentals; Simple Network Management Protocol - Avaya 8800 Troubleshooting Manual

Chapter 6: Log and trap fundamentals

Use the information in this section to help you understand Simple Network Management Protocol (SNMP)
traps and log files, available as part of the Avaya Ethernet Routing Switch 8800/8600 System Messaging
Platform.

Simple Network Management Protocol

The Simple Network Management Protocol (SNMP) provides facilities for managing and
monitoring network resources. It consists of the following:
• agents
An agent is software running on a device that maintains information about device
configuration and current state in a database.
• managers
An SNMP manager is an application that contacts an SNMP agent to query or modify the
agent database.
• the SNMP protocol
SNMP is the application-layer protocol used by SNMP agents and managers to send and
receive data.
• Management Information Bases (MIB)
The MIB is a text file that specifies the managed objects by an object identifier (OID).
Important:
An Ethernet Routing Switch 8800/8600 does not reply to SNMP requests to its VRRP virtual
interface address. It reples to SNMP requests to its physical IP address.
An SNMP manager and agent communicate through the SNMP protocol. A manager sends
queries and an agent responds; however, traps are initiated by an agent. There are several
types of packets used between SNMP managers and agents:
• Get Request
This message requests the values of one or more objects.
• Get Next Request
This message requests the value of the next object.
• Set Request
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