Collecting Router Operational Information with SNMP

Problem

You want the NMS server to check and record operational information about the router.

Solution

Look at the contents of the jnxOperatingTable table in the chassis MIB:

	aviva@router1> show snmp mib walk jnxOperatingTable
	…
	jnxOperatingDescr.1.1.0.0 = backplane
	jnxOperatingDescr.2.1.0.0 = Power Supply A
	jnxOperatingDescr.4.1.0.0 = Front Upper Fan
	jnxOperatingDescr.4.2.0.0 = Front Middle Fan
	jnxOperatingDescr.4.3.0.0 = Front Bottom Fan
	jnxOperatingDescr.4.4.0.0 = Rear Fan
	jnxOperatingDescr.6.1.0.0 = SSB 0 Internet Processor IIv1
	jnxOperatingDescr.6.2.0.0 = SSB 1
	jnxOperatingDescr.7.1.0.0 = FPC: E-FPC @ 0/*/*
	jnxOperatingDescr.7.2.0.0 = FPC: E-FPC @ 1/*/*
	jnxOperatingDescr.8.1.1.0 = PIC: 4x F/E, 100 BASE-TX @ 0/0/*
	jnxOperatingDescr.8.1.2.0 = PIC: 2x CT3-NxDS0 @ 0/1/*
	jnxOperatingDescr.8.1.3.0 = PIC: 4x CT3 @ 0/2/*
	jnxOperatingDescr.8.2.1.0 = PIC: 2x OC-3 ATM, MM @ 1/0/*
	jnxOperatingDescr.9.1.0.0 = Routing Engine 0
	jnxOperatingDescr.9.2.0.0 = Routing Engine 1
	jnxOperatingDescr.10.1.0.0 = Front Panel Display
	jnxOperatingTemp.1.1.0.0 = 22
	jnxOperatingTemp.2.1.0.0 = 22
	jnxOperatingTemp.4.1.0.0 = 0
	jnxOperatingTemp.4.2.0.0 = 0
	jnxOperatingTemp.4.3.0.0 = 0
	jnxOperatingTemp.4.4.0.0 = 0
	jnxOperatingTemp.6.1.0.0 = 30
	jnxOperatingTemp.6.2.0.0 = 0
	jnxOperatingTemp.7.1.0.0 = 28
	jnxOperatingTemp.7.2.0.0 = 27
	jnxOperatingTemp.8.1.1.0 = 0
	jnxOperatingTemp.8.1.2.0 = 0
	jnxOperatingTemp.8.1.3.0 = 0
	jnxOperatingTemp.8.2.1.0 = 0
	jnxOperatingTemp.9.1.0.0 = 29
	jnxOperatingTemp.9.2.0.0 = 31
	jnxOperatingTemp.10.1.0.0 = 0
	…

 

Discussion

The jnxOperatingTable table in the chassis MIB lists all the components installed in the chassis along with information about their operation state. This table has an absolute OID of .1.3.6.1.4.1.2636.3.1.13.

The abridged output in the recipe shows the router hardware components and the current temperature (in degrees Celsius) for each component. This table contains much more information about the hardware, such as DRAM size (in bytes) for components that have memory:

	jnxOperatingDRAMSize.6.1.0.0 = 67108864
	jnxOperatingDRAMSize.7.1.0.0 = 33554432
	jnxOperatingDRAMSize.7.2.0.0 = 33554432
	jnxOperatingDRAMSize.9.1.0.0 = 805306368
	jnxOperatingDRAMSize.9.2.0.0 = 805306368

Referring back to the list of hardware components, jnxOperatingDRAMSize.6.1.0.0 is the router's System and Switch Board ( SSB), which handles forwarding for M20 routers. The other items are the FPC0 and FPC1 boards and the two Routing Engines. The output also shows how long a component has been up:

	jnxOperatingUpTime.1.1.0.0 = 35718300
	jnxOperatingUpTime.2.1.0.0 = 35719533
	jnxOperatingUpTime.4.1.0.0 = 35719534
	jnxOperatingUpTime.4.2.0.0 = 35719535
	jnxOperatingUpTime.4.3.0.0 = 35719536
	jnxOperatingUpTime.4.4.0.0 = 35719537
	jnxOperatingUpTime.6.1.0.0 = 6515160
	jnxOperatingUpTime.6.2.0.0 = 0
	jnxOperatingUpTime.7.1.0.0 = 6511883
	jnxOperatingUpTime.7.2.0.0 = 6511798
	jnxOperatingUpTime.8.1.1.0 = 6509154
	jnxOperatingUpTime.8.1.2.0 = 6509150
	jnxOperatingUpTime.8.1.3.0 = 6509100
	jnxOperatingUpTime.8.2.1.0 = 6508973
	jnxOperatingUpTime.9.1.0.0 = 35718300
	jnxOperatingUpTime.9.2.0.0 = 1978055600
	jnxOperatingUpTime.10.1.0.0 = 35719549

The output shows that RE0 has been up for 35,718,300 10-second intervals, which is about 99 hours, or just over 4 days. You can confirm the Routing Engine information shown in the MIB objects with the following CLI command:

	aviva@router1> show chassis routing-engine
	Routing Engine status:
	 Slot 0:
	 Current state Master
	 Election priority Master (default)
	 Temperature 29 degrees C / 84 degrees F
	 CPU temperature 30 degrees C / 86 degrees F
	 DRAM 768 MB
	 Memory utilization 36 percent
	CPU utilization:
	 User 0 percent
	 Background 0 percent
	 Kernel 1 percent
	 Interrupt 0 percent
	 Idle 99 percent
	Model RE-2.0
	Serial ID 58000007348d9a01
	Start time 2005-12-07 13:28:55 PST
	Uptime 4 days, 3 hours, 57 minutes, 35 seconds
	Load averages: 1 minute 5 minute 15 minute
	 0.07 0.05 0.02







JUNOS Cookbook
Junos Cookbook (Cookbooks (OReilly))
ISBN: 0596100140
EAN: 2147483647
Year: 2007
Pages: 290
Authors: Aviva Garrett
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