One more question- how properly vendors usually keep the MIB files and
MIB support on SNMP agent in correlation? I mean are there sometimes
features listed in MIB files which actually are not present in device
SNMP agent and the other way around?
thanks,
Martin
On 7/9/15, Martin T <m4rtn...@gmail.com> wrote:
> Thanks for excellent answer!
>
>
> Martin
>
> On 7/8/15, Stuart Kendrick <stua...@alleninstitute.org> wrote:
>> 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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