Download Tivoli Netcool Supports Guide to the Nortel IEMS probe by Jim

Tivoli Netcool Supports
Guide to the
Nortel IEMS probe
by
Jim Hutchinson
Document release: 2.0
Supports Guide to the Nortel IEMS probe
Table of Contents
1Introduction...................................................................................................................................2
1.1Overview......................................................................................................................................2
2Troubleshooting...........................................................................................................................4
2.1Sending an SNMPv1 trap............................................................................................................4
2.2Checking the Nortel IEMS server................................................................................................5
2.3Performing a Manual Resync Request........................................................................................6
2.3.1SNMPWALK.............................................................................................................................6
2.3.2SNMPGETNEXT and SNMPGET............................................................................................6
IBM Copyright 2014
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Supports Guide to the Nortel IEMS probe
1 Introduction
1.1 Overview
The Nortel IEMS Probe is a direct SNMP monitoring probe, similar to the MTTrapd (SNMP) probe.
The probe acquires event data by acting as a trap daemon and monitoring SNMP traps and events on both UDP
and TCP sockets. When the probe starts, it performs a full resynchronization with the Nortel IEMS server using
SNMPGET and SNMPGETNEXT. The probe then processes new alarms as they are generated. The Nortel IEMS
server stores the most recently generated alarms in a cache table. It is possible to specify the number of alarms
held in the cache table using the NlmConfigGlobalEntryLimit property (default 25). The value of
NlmConfigGlobalEntryLimit muist reflect the value set on the Nortel IEMS server.
Each alarm has a sequence number. If the Nortel IEMS probe misses one or more alarm, such as it receives alarms
that do not have consecutive sequence numbers, it will perform either a full or an incremental resynchronization
with the Nortel IEMS server.
The type of synchronisation depends on the number of consecutive events that the probe has missed. If the number
of consecutive events missed by the Nortel IEMS probe is greater than the number specified by the
NlmConfigGlobalEntryLimit property, the probe performs a full resynchronization. If the number of consecutive
events missed by the probe is less than or equal to this number, the probe performs an incremental
resynchronization.
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Supports Guide to the Nortel IEMS probe
The Nortel IEMS probe uses two ports, one for sending SNMP requests to the Nortel IEMS server, the other for
listening to SNMP traps. The diagram below illustrates which properties refer to which part of the communication
process.
Probe
Nortel IEMS Server
BindAddress
NortelEMSHostName
NortelEMSPort
LISTEN
GET
Port
LISTEN
SEND
The probe will request events when its experiences a drift in the event sequence numbers or when a
resynchronisation requested is received. It is important to have the NlmConfigGlobalEntryLimit configured to be the
same as the cache value in the Nortel IEMS server.
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Supports Guide to the Nortel IEMS probe
2 Troubleshooting
The NET-SNMP software is freely available for probe supported platforms from www.net-snmp.org. This software
can be used to query the Nortel IEMS server and send events to the Nortel IEMS probe.
Useful commands

snmptrap : Sends a trap to a given ipaddress and port

snmpwalk : Walks a given MIB

snmpget : Gets values from a given OID

snmpgetnext : Gets the next value from an OID
The values that define the system are;
Nortel IEMS Server:•
NortelEMSHostName : IP Address or hostname of IEMS Server
•
NortelEMSPort : Port to which SNMPGET/SNMPGETNEXT requests are sent
Nortel IEMS Probe:•
BindAddress : IP-Address of probe server, used for multiple interfaces
•
Port : Port the probe listens for SNMP traps
•
Protocol : Type of SNMP traps listened for by the probe
2.1 Sending an SNMPv1 trap
The net-snmp tools provide a command called snmptrap, that can send SNMPv1, SNMPv2 and SNMPv3 traps and
informs to a given ip-address and port;
e.g.
snmptrap -v 1 -c public ipaddress:1620 "" "" 6 99 ""e
Where ipaddress is the ip-address of the probe and 1620 the port it is listening on. By default UDP requests are
sent.
In order to specify TCP traps the following syntax is required;
snmptrap -v 1 -c public TCP:ipaddress:1620 "" "" 6 99 ""e
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Supports Guide to the Nortel IEMS probe
2.2 Checking the Nortel IEMS server
Ensure that the Nortel IEMS Server is avaliable
ping <NortelEMSHostName>
traceroute <NortelEMSHostName>
Check that the NortelEMSPort is active
snmpwalk -v2c -Cc -c public <NortelEMSHostName>:<NortelEMSPort> SNMPv2-SMI::mib 2.118.1.2.2.1.10
Check the NlmConfigGlobalEntry matches the value set n the Nortel IEMS Server
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Supports Guide to the Nortel IEMS probe
2.3 Performing a Manual Resync Request
2.3.1 SNMPWALK
List of all active oid's :
snmpwalk -v2c -Cc -c public ipaddress:8001 SNMPv2-SMI::mib 2.118.1.2.2.1.10
2.3.2 SNMPGETNEXT and SNMPGET
Use snmpgetnext starting with .1.3.6.1.2.1.118.1.2.2.1.10
Where .1.3.6.1.2.1.118.1.2.2.1.10 is the active index oid
snmpgetnext -t10 -r0 -v2c -c public ipaddress:8001 .1.3.6.1.2.1.118.1.2.2.1.1.10
Results:SNMPv2-SMI::mib
2.118.1.2.2.1.10.12.78.111.114.116.101.108.95.102.97.117.108.116.28.50.48.48.55.45.49.49.45.49.57.44.48.57.58.48
.50.58.53.48.46.52.44.43.48.48.58.48.48.1
= OID: SNMPv2-SMI::mib2.118.1.2.2.1.10.12.78.111.114.116.101.108.95.102.97.117.108.116.28.50.48.48.55.45.49.49.45.49.57.44.48.57.58.48
.50.58.53.48.46.52.44.43.48.48.58.48.48.1
Returned value is used in the next snmpgetnext command:
snmpgetnext -t10 -r0 -v2c -c public ipaddress:8001 .
1.3.6.1.2.1.118.1.2.2.1.10.12.78.111.114.116.101.108.95.102.97.117.108.116.28.50.48.48.55.45.49.49.45.49.57.44.4
8.57.58.48.50.58.53.48.46.52.44.43.48.48.58.48.48.1
This is repeated until the original oid is returned
.
1.3.6.1.2.1.118.1.2.2.1.10.12.78.111.114.116.101.108.95.102.97.117.108.116.28.50.48.48.55.45.49.49.45.49.57.44.4
8.57.58.48.50.58.53.48.46.52.44.43.48.48.58.48.48.1
From the list of oid's collected, extract the last digit of each oid collected :
e.g. The return-oid is one ‘1’
.
1.3.6.1.2.1.118.1.2.2.1.10.12.78.111.114.116.101.108.95.102.97.117.108.116.28.50.48.48.55.45.49.49.45.49.57.44.4
8.57.58.48.50.58.53.48.46.52.44.43.48.48.58.48.48.1
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Supports Guide to the Nortel IEMS probe
Perform an SNMPGET on the elements;
snmpget -r0 -v2c -c public ipaddress:8001 .1.3.6.1.2.1.118.1.2.3.1.10.
12.78.111.114.116.101.108.95.102.97.117.108.116.return-oid.2
e.g.
snmpget -r0 -v2c -c public ipaddress:8001 .1.3.6.1.2.1.118.1.2.3.1.10.
12.78.111.114.116.101.108.95.102.97.117.108.116.1.2
The returned value will be one of the following alarm types;
nnExtAlarmWarning
nnExtAlarmMinor
".1.3.6.1.4.1.562.29.234298042.1.0.302"
".1.3.6.1.4.1.562.29.234298042.1.0.303"
nnExtAlarmMajor
nnExtAlarmCritical
".1.3.6.1.4.1.562.29.234298042.1.0.304"
".1.3.6.1.4.1.562.29.234298042.1.0.305"
nnExtAlarmClear
".1.3.6.1.4.1.562.29.234298042.1.0.301"
nnIsoExtAlarmWarning
".iso.3.6.1.4.1.562.29.234298042.1.0.302"
nnIsoExtAlarmMinor
nnIsoExtAlarmMajor
".iso.3.6.1.4.1.562.29.234298042.1.0.303"
".iso.3.6.1.4.1.562.29.234298042.1.0.304"
nnIsoExtAlarmCritical
nnIsoExtAlarmClear
".iso.3.6.1.4.1.562.29.234298042.1.0.305"
".iso.3.6.1.4.1.562.29.234298042.1.0.301"
nnNlmExtAlarmWarning
nnNlmExtAlarmMinor
".1.3.6.1.4.1.562.29.6.1.0.302"
".1.3.6.1.4.1.562.29.6.1.0.303"
nnNlmExtAlarmMajor
nnNlmExtAlarmCritical
".1.3.6.1.4.1.562.29.6.1.0.304"
".1.3.6.1.4.1.562.29.6.1.0.305"
nnNlmExtAlarmClear
".1.3.6.1.4.1.562.29.6.1.0.301"
nnIsoNlmExtAlarmWarning
".iso.3.6.1.4.1.562.29.6.1.0.302"
nnIsoNlmExtAlarmMinor
nnIsoNlmExtAlarmMajor
".iso.3.6.1.4.1.562.29.6.1.0.303"
".iso.3.6.1.4.1.562.29.6.1.0.304"
nnIsoNlmExtAlarmCritical
nnIsoNlmExtAlarmClear
".iso.3.6.1.4.1.562.29.6.1.0.305"
".iso.3.6.1.4.1.562.29.6.1.0.301"
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