[mrtg] Re: Cisco 29xx switch target question

[Larry Sheldon]

> I am monitoring a number of Cisco 29xx switches and I am having difficulty
> working out how the targets apply to the physical ports of the switch. For
> example, I have a line into physical port 1 and the target set to 2 in the
> MRTG config file. Do the Cisco switches count their console port and VLAN
> addresses as a target or is there and easier was of monitoring specific
> physical ports?

My reading of the relevant RFC's and my experience with several different
kinds of machines is that the there is no particular relationship 
between occurrences of interfaces on a box and occurrence numbers in the
MIB trees.

Many implementations (some 3Com and some cisco come quickly to mind) assign
MIB occurence numbers (usually at boot-time) in a process that appears to
have randomness as an input.

So there is no way to predict what the OID instance number will be for
"serial 3", "fastethernet 4/2" and so on.
--
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
.                                                                       .
- L. F. (Larry) Sheldon, Jr.                                            -
. Unix Systems and Network Administration                               .
- Creighton University Computer Center-Old Gym                          -
. 2500 California Plaza                                                 .
- Omaha, Nebraska, U.S.A.  68178       Two identifying characteristics  -
. lsheldon at creighton.edu                  of System Administrators:     .
- 402 280-2254 (work)                Infallibility, and the ability to  -
. 402 681-4726 (cellular)               learn from their mistakes.      .
- 402 332-4622 (residence)                                              -
. http://www.creighton.edu/~lsheldon    Adapted from Stephen Pinker     .
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-

--
Unsubscribe mailto:mrtg-request at list.ee.ethz.ch?subject=unsubscribe
Archive     http://www.ee.ethz.ch/~slist/mrtg
FAQ         http://faq.mrtg.org    Homepage     http://www.mrtg.org
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi