[mrtg] Graphing by interfacename - Case insensitive?

[Edwin A. Epstein III]

Hi Edrich,

I don't think there is a way to make case insensitive. Not within MRTG operations. The only way it would work would be trial and error until an interface matched, trying all variations to determine the right one. In that use case it makes far more sense to use one of the other interface reference methods. You could match by:

 1) Interface Number
 2) Ethernet Address
 3) Interface Description
 4) Interface Name
 5) Interface Type

For most equipment I play with #3 and #4 are the same. If for some reason you cannot, then I believe it would be easier to write a script for a cron job. Use snmpwalk and capture the current value, then use sed to replace the target line in the MRTG config. That way you could it updated.





Sincerely, 

Edwin A Epstein, III 
Rhinobee Internet Services 
707.237.7504 ext 209 
707.737.0288 Mobile

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Today's Topics:

   1. Graphing by interfacename - Case insensitive? (Edrich de Lange)
   2. Re: [unsure]  Graphing by interfacename - Case insensitive?
      (Alex van den Bogaerdt)


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Message: 1
Date: Mon, 26 Mar 2018 10:24:44 +0200
From: Edrich de Lange <edd at delcon.biz>
To: mrtg at lists.oetiker.ch
Subject: [mrtg] Graphing by interfacename - Case insensitive?
Message-ID:
	<CAO2mfay+MEoEbboEE8KAfqRw22P9=x2CrDqCDCAd1gCF-PzrEg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi All

I have a googled, and read through various forums, and have had little luck.

Im currently using the graph by interface name to graph some dynamic
interfaces. it works brilliantly.

However, my biggest problem at the moment is that sometimes the users
change the case of the interface name, and then it stops graphing.

Is there any way to make this case insensitive?

Kind regards
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Message: 2
Date: Mon, 26 Mar 2018 11:54:07 +0200
From: "Alex van den Bogaerdt" <alex at vandenbogaerdt.nl>
To: mrtg at lists.oetiker.ch
Subject: Re: [mrtg] [unsure]  Graphing by interfacename - Case
	insensitive?
Message-ID:
	<6f466744d65b40358271ca5303dbe087.squirrel at webmail.argewebhosting.nl>
Content-Type: text/plain;charset=utf-8

> Hi All
>
> I have a googled, and read through various forums, and have had little
> luck.
>
> Im currently using the graph by interface name to graph some dynamic
> interfaces. it works brilliantly.
>
> However, my biggest problem at the moment is that sometimes the users
> change the case of the interface name, and then it stops graphing.
>
> Is there any way to make this case insensitive?

That's probably just a matter of changing a regular expression.

But....

If your users can change interface names, what's there to stop them from
changing the name in something other than just a difference in case ?




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