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Last modified by Frank Fock on 2024/05/25 12:38
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1 With SNMP4J and SNMP4J-Agent you can create a simulation agent from a real agent in two steps:
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3 ==== 1. Create a MIB walk snapshot file ====
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5 A snapshot file can be created with [[SNMP4J-CLT>>url:https://doc.snmp.app/display/SNMP4J/SNMP4J-CLT-Usage]], [[SNMP4J>>url:http://www.snmp4j.org/]], and [[MIB Explorer Pro>>url:http://www.mibexplorer.com/]]. The following examples illustrate the commands necessary to save a snapshot file with SNMP4J-CLT from an agent that listens on the //localhost// interface on port //161//:
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7 {{code}}
8 java -jar SNMP4J-CLT.jar -v 2c -c public create-snapshot /tmp/mibdump.sf 127.0.0.1/161 1.3.6
9 {{/code}}
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11 With MIB Explorer Pro, you can use the MIB browser GUI to walk a subtree (or several independent subtrees, even from different agents) and combine those variables into a snapshot file. You can also compare snapshot files and view their content.
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13 _Note: To use a snapshot file stored by MIB Explorer Pro with SNMP4J-Agent, you need to convert it into the SNMP4J snapshot format first. For MIB Explorer 2.x snapshot files download the converter from [[https:~~/~~/agentpp.com/tools/mibexplorer/SnapshotConv.jar>>url:https://agentpp.com/tools/mibexplorer/SnapshotConv.jar]] and run it with:
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15 {{code}}
16 java -jar SnapshotConv.jar [-h] <mibexplorer-snaphost-file> <snmp4j-snapshot-file> 
17 {{/code}}
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19 ==== 2. Run the SNMP4J-Agent Snapshot-Agent with the created file ====
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21 The following command line starts an agent listening on all interfaces on port //4700// which is provides the MIB variables collected in the file **/tmp/mibdump.sf**:
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23 {{code}}
24 java -cp SNMP4J-agent.jar;SNMP4J.jar org.snmp4j.agent.test.SnapshotAgent /tmp/mibdump.sf 0.0.0.0/4700
25 {{/code}}
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27 This agent can be then browsed using SNMP4J-CLT with:
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29 {{code}}
30 java -jar SNMP4J-CLT.jar -v 2c -c public walk 127.0.0.1/4700 1.3.6
31 {{/code}}