Recovering Lost Traps; Configuring The Snmp Server Event Manager - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SYSTEM BASICS CONFIGURATION GUIDE 2010-10-04 Configuration Manual

JunosE 11.3.x System Basics Configuration Guide

Recovering Lost Traps

snmp-server host

Configuring the SNMP Server Event Manager

166
Use the no version to remove the notification log configuration.
See snmp-server notificationLog log.
SNMP traps can be lost during startup of the E Series router for one of the following
reasons:
The SNMP agent begins sending SNMP traps to the host before the line module is
1.
initialized.
If the SNMP proxy virtual router is initialized after other virtual routers, traps generated
2.
by the other virtual routers and sent to the proxy router are lost.
To recover SNMP traps that are lost during system startup, the SNMP agent pings the
configured trap host to identify that there is a communication path between E Series
router and host. On successful ping acknowledgment, the lost traps are reconstructed
for each virtual router. In the case of scenario 1, the reconstructed traps are sent to the
proxy virtual router to be routed to the appropriate hosts. In the case of scenario 2, the
traps are sent directly to the appropriate hosts.
You can configure the ping timeout window with the snmp-server host command. The
following are guidelines for setting the maximum ping window:
If you are losing traps because of scenario 1, base the maximum ping window time on
the estimated time that it takes to establish connectivity in a particular network. (For
some configurations it can take more than 30 minutes to establish connectivity.)
If you are losing traps because of scenario 2, we recommend that you use the default
value for the maximum ping window time, which is one minute.
Use to set the ping timeout for the host that is receiving SNMP traps.
Use the pingtimeout keyword to set the ping timeout window; the range is 1–90
minutes.
Example
host1(config)#snmp-server host 10.10.4.4 pingtimeout 2
Use the no version to remove the SNMP host.
See snmp-server host.
The SNMP server event manager works in conjunction with the Event MIB (RFC 2981).
The purpose of this application is to allow many management functions (for example,
fault detection, configuration management, accounting management, and performance
management). These functions are traditionally performed by the network management
Copyright © 2010, Juniper Networks, Inc.