Yes, I understand the relationship between SNMP agents & MIB files in the way
you and DPS describe below.
Rephrasing using my words:
- Manufacturer decides to support, say, monitoring fan state. Let's take Cisco
as an example
- Cisco writes the CISCO-ENVMON-MIB file, including an Object Value which
returns the state of a given fan:
ciscoEnvMonFanState OBJECT-TYPE
SYNTAX CiscoEnvMonState
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current state of the fan being instrumented."
::= { ciscoEnvMonFanStatusEntry 3 }
- Developers use the definitions in that MIB file to write code. I suspect
that implementations vary widely -- one possible way to do this:
(1) In the Cisco IOS, include support for talking to the hardware in order to
report on fan state
(2) In the Cisco CLI, include support for some sort of 'show fan state' command
(3) In the Cisco SNMP agent, include support for querying fan state
- Voila: an operating system which supports reporting on fan state from both
the CLI and the SNMP agent.
--sk
-----Original Message-----
From: Martin T [mailto:m4rtn...@gmail.com]
Sent: Wednesday, July 08, 2015 8:30 AM
To: net-snmp-users@lists.sourceforge.net
Subject: correlation of MIB files and MIB support on SNMP agents
Hi,
I read a product pamphlet from DPS Telecom where they had following Q&A section:
-----
Q: I want to use a device feature that isn’t described in the MIB.
What can I do?
A: You can ask the vendor to extend the MIB to include this feature.
DPS Telecom has extended its MIB to support client needs. But you need to
understand that extending a MIB is actually a software development project. The
MIB is not just a text file. It’s also a software interface document to the
embedded firmware of your SNMP device.
Making additions to the MIB requires rewriting the device firmware.
This is a serious project, involving writing code, debugging it, and undergoing
a thorough quality assurance process.
-----
So am I correct that vendors like Cisco or Juniper develop their MIB files
which are downloadable from their web-sites tightly with their MIB support on
SNMP agents? In other words MIB files and MIB support on SNMP agents is closely
correlated?
thanks,
Martin
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