Re: SNMP Commands (was Re: How do I monitor the CPU temperature in an ES40 running OpenVMS 7.3-1?

briggs_at_encompasserve.org
Date: 07/07/03 

Date: 7 Jul 2003 08:30:01 -0500

In article <1ca82fc6.0307061815.45694de9@posting.google.com>, dooleys@snowy.net.au (dooley) writes:
> "David J. Dachtera" <djesys.nospam@fsi.net> wrote in message news:<3F0878CE.889AB110@fsi.net>...
>> Verne wrote:
>> >
>> > >
>> > >[snip]
>> > >
>> >
>> > Don't know if this would help, but once I tried some SNMP stuff, and
>> > from the on-line help (HELP MULTI SHOW /SNMP) and the Info-Multinet
>> > mailing list archives at www.process.com, I came up with (perhaps a
>> > trivial example):
>> >
>> > mul show /snmp=11.22.33.44/mib=mib-2.43.10.2.1.4.1.1
>> >
>> > and
>> >
>> > mul show /snmp=11.22.33.44/mib=enterprises.11.2.3.9.4.2.2.10.2.1.4.1.1
>> >
>> > to see the lifetime page counter on a printer... at least this works
>> > on newer HP JetDirect-attached printers, such as the LJ5, LJ4000 and
>> > the LJ2100 (would not work on a III or IV).
>> >
>> > Sorry, but I forget where I got the MIB variable 'id' from :-(
>>
>> Yeah - discovered those ages ago.
>>
>> $ MULT SHOW/CONN/SNMP=x.x.x.x/MIB_VAR/OUT=filespec
>>
>> ...will list out all the MIB varaibles on the target node and their
>> current values.
>>
>> O.k. Let me try this another way:
>>
>> I'm looking for a way - from a VMS system running Multinet - to send a
>> SNMP trap to a "foreign" system monitoring center (at work, they're
>> trying to use Cisco's CIC).
>>
>> Does *THAT* help?
>>
>> I *DON'T* want to use the VMS system examine other systems, I want the
>> VMS system to be able to alert a "foreign" system when some bit of
>> system administrivia goes awry (disk fills up, shadow-set member gets
>> dropped, backup job fails, etc.).
>>
>> Does *THAT* help?
> Your "foreign" system admin should be able to tell you -
> the ip address of the system that will receive the trap
> the community name to use
> the port to use (162?)
> the "enterprise" (compaq is 1.3.6.1.4.1.232.)
> the oid to use within 232 to indicate disk full or whatever
> use this link to identify "enterprises"
> http://www.alvestrand.no/objectid/1.3.6.1.4.1.html

The key piece that David is missing is not the community string,
MIB variable or UDP port number. It is a piece of software
that would allow _traps_ to be _sent_ from Multinet.

One way to go would be to write a program to format the UDP datagam
and send it yourself. Once you come up to speed on the ASN.1
coding conventions, this would not be much work. But coming up
to speed can be a pain.

David -- I have some very old software that I wrote in C that
does SNMP gets and sets under Multinet ($QIO interface). It's
"roll your own" code and includes pieces which do the ASN.1
formatting for the outbound SNMP requests and ASN.1 parsing for the
resulting responses. It's huge, site specific and pretty ugly but it
should have most of the support routines you would need to use to
craft a trap datagram. And the comments contain pretty much
everything I know about ASN.1. E-mail me if you want a copy.

        John Briggs