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<strong>Discussion</strong><br />

The jnxOperatingTable table in the chassis MIBlists all the components installed in<br />

the chassis along with information about their operation state. This table has an<br />

absolute OID of .1.3.6.1.4.1.2636.3.1.13.<br />

The abridged output in the recipe shows the router hardware components and the<br />

current temperature (in degrees Celsius) for each component. This table contains<br />

much more information about the hardware, such as DRAM size (in bytes) for components<br />

that have memory:<br />

jnxOperatingDRAMSize.6.1.0.0 = 67108864<br />

jnxOperatingDRAMSize.7.1.0.0 = 33554432<br />

jnxOperatingDRAMSize.7.2.0.0 = 33554432<br />

jnxOperatingDRAMSize.9.1.0.0 = 805306368<br />

jnxOperatingDRAMSize.9.2.0.0 = 805306368<br />

Referring back to the list of hardware components, jnxOperatingDRAMSize.6.1.0.0 is<br />

the router’s System and Switch Board (SSB), which handles forwarding for M20 routers.<br />

The other items are the FPC0 and FPC1 boards and the two Routing Engines.<br />

The output also shows how long a component has been up:<br />

jnxOperatingUpTime.1.1.0.0 = 35718300<br />

jnxOperatingUpTime.2.1.0.0 = 35719533<br />

jnxOperatingUpTime.4.1.0.0 = 35719534<br />

jnxOperatingUpTime.4.2.0.0 = 35719535<br />

jnxOperatingUpTime.4.3.0.0 = 35719536<br />

jnxOperatingUpTime.4.4.0.0 = 35719537<br />

jnxOperatingUpTime.6.1.0.0 = 6515160<br />

jnxOperatingUpTime.6.2.0.0 = 0<br />

jnxOperatingUpTime.7.1.0.0 = 6511883<br />

jnxOperatingUpTime.7.2.0.0 = 6511798<br />

jnxOperatingUpTime.8.1.1.0 = 6509154<br />

jnxOperatingUpTime.8.1.2.0 = 6509150<br />

jnxOperatingUpTime.8.1.3.0 = 6509100<br />

jnxOperatingUpTime.8.2.1.0 = 6508973<br />

jnxOperatingUpTime.9.1.0.0 = 35718300<br />

jnxOperatingUpTime.9.2.0.0 = 1978055600<br />

jnxOperatingUpTime.10.1.0.0 = 35719549<br />

The output shows that RE0 has been up for 35,718,300 10-second intervals, which is<br />

about 99 hours, or just over 4 days. You can confirm the Routing Engine information<br />

shown in the MIB objects with the following CLI command:<br />

aviva@router1> show chassis routing-engine<br />

Routing Engine status:<br />

Slot 0:<br />

Current state<br />

Master<br />

Election priority<br />

Master (default)<br />

Temperature<br />

29 degrees C / 84 degrees F<br />

CPU temperature<br />

30 degrees C / 86 degrees F<br />

DRAM<br />

768 MB<br />

Memory utilization<br />

36 percent<br />

146 | Chapter 4: SNMP<br />

This is the Title of the Book, eMatter Edition<br />

Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.

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