Sorry if this seems rudimentary - but i'm looking into this stuff for the first time and i'm finding it a bit confusing.
I downloaded and i'm using filer-mrtg which uses mrtg to plot various system parameters - some of which are collected using SMTP.
In the cfg files for the filers i can see lines like this:
Target[ast-h-tsb02.net.snmp]: 1.3.6.1.4.1.789.1.2.2.2.0&1.3.6.1.4.1.789.1.2.2.3.0:public@ast-h-tsb02
The one above gets total network traffic from the filer.
Where do these long lines of numbers come from? Where are they defined? I'm getting the impression that they are somehow related to the netapp.mib file - but i can't find any clues how that format is converted into these sets on numbers.
For instance, i'd like to monitor snapshot size - it looks like i could do it according to the netapp.mib but i cannot figure out what string of numbers or parameters to put into the Target field.
Any tips - or pointers (including "go read this book") would be much appreciated.
Thx, Graham
On Thu, 18 Mar 1999, Graham C. Knight wrote:
Sorry if this seems rudimentary - but i'm looking into this stuff for the first time and i'm finding it a bit confusing.
Get a decent book on TCP/IP for starters. "TCP/IP" by O'Reilly or much better "TCP/IP Illustrated" by Addison - Wesley.
I downloaded and i'm using filer-mrtg which uses mrtg to plot various system parameters - some of which are collected using SMTP.
SMTP? Isn't that for e-mail?
In the cfg files for the filers i can see lines like this: Target[ast-h-tsb02.net.snmp]: 1.3.6.1.4.1.789.1.2.2.2.0&1.3.6.1.4.1.789.1.2.2.3.0:public@ast-h-tsb02
Those are tree adresses for the SNMP data structures. To see what they mean check out the MIBs (Management Infotrmation Bases), but be ready for some heavy duty reading.
Where do these long lines of numbers come from?
I'll take this as a rhetorical question.
Where are they defined?
Their meaning is defined in various MIBs.
I'm getting the impression that they are somehow related to the netapp.mib file - but i can't find any clues how that format is converted into these sets on numbers.
Have you ever worked with an SNMP manager? Do you remember traversing a tree, i.e. opening one object to open others to finally get some data? The numbers represent the steps you took (well, the first couple of steps were hidden from you).
For instance, i'd like to monitor snapshot size- it looks like i could do it according to the netapp.mib but i cannot figure out what string of numbers or parameters to put into the Target field.
If NAC's SNMP agents collect and relay that information then there should be an entry for it in the MIB. The number would be the path from the root of the MIB (there is some version info and such at the beginning) to the place where those data are presented.
Any tips - or pointers (including "go read this book") would be much appreciated.
I personally haven't read any books dedicated to SNMP. It's an extremely simple protocol. I'd suggest reading an RFC on MIBs (I forget which one, there are a bunch of them on SNMP), if you're comfortable with technobable. I'm sure O'Reilly has an OK book about SNMP.
Tom
P.S. It's SNMP = Simple Network Management Protocol not SMTP = Simple Mail Transfer Protocol
P.S. It's SNMP = Simple Network Management Protocol not SMTP = Simple Mail Transfer Protocol
Thanks Tom, I'll check my acronyms a bit more closely next time. You get used to typing one thing - and bingo - out it comes. Jeez, it could even make a guy look stooopid. ;-)
Oh, and thanks tons to Brian Hackworth for answering all my questions.
Graham
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Graham C. Knight -
Graham Knight -
tkaczma＠gryf.net