2 chained EX 4500 I'd like to monitor using SNMP.


Can anyone please explain how did he translate "jnxOperatingDescr" to "" ?


  • 1
    The MIB file 'mib-jnx-chassis.txt', referenced in your linked article, is used to perform the translation. Are you asking how MIBs work?
    – jscott
    Commented Mar 4, 2014 at 18:00
  • How is that file used to perform the translation? I mean using what command.
    – JustAGuy
    Commented Mar 4, 2014 at 18:29

1 Answer 1


First, IANA assigns OIDs under which are "Private Enterprises." Juniper has (see http://www.alvestrand.no/objectid/

To get the rest it is better to trace backwards from the last element "jnxOperatingDescr." Here is the definition:

jnxOperatingDescr OBJECT-TYPE
  SYNTAX        DisplayString (SIZE (0..255))
  MAX-ACCESS    read-only
  STATUS        current
    "The name or detailed description of this subject."
  ::= { jnxOperatingEntry 5 }

The last line indicates the last number in the OID is 5 and the parent is jnxOperatingEntry. Looking at the definition for jnxOperatingEntry and you'll find "::= { jnxOperatingTable 1 }" so the next entry is 1 and the parent is jnxOperatingTable. Tracing these all the way back you get Concatentate Juniper's private enterprise

  • isnt there a way to do this using snmptranslate or something?
    – JustAGuy
    Commented Mar 4, 2014 at 18:57
  • Yes: "snmptranslate -On JUNIPER-MIB::jnxOperatingDescr". You need to have the Juniper MIBs from juniper.net/techpubs/en_US/release-independent/junos/mibs/… Commented Mar 4, 2014 at 19:12
  • I get many "unlinked OID"... what am I missing?
    – JustAGuy
    Commented Mar 4, 2014 at 19:21
  • What I did: cd ~/.snmp/mibs; wget juniper.net/techpubs/software/junos/junos133/…; tar zxf juniper-mibs-13.3R1.6.tgz; mv JuniperMibs/* .; snmptranslate -On JUNIPER-MIB::jnxOperatingDescr (NET-SNMP version: Commented Mar 4, 2014 at 22:03
  • I dont know why but it simply didnt work with the files inside the ZIP file I downloaded. The tar file worked flawlessly. Thanks alot!
    – JustAGuy
    Commented Mar 4, 2014 at 22:30

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