[mrtg] Re: mrtg weirdness

Nate Amsden aphro at portal.aphroland.org
Sat Mar 24 20:06:38 MET 2001

Larry Sheldon wrote:
> > The problem is mrtg(or the switch???) reports inverse stats for (seemingly)
> > all
> > ports except the uplink port.
> Don't forget that the data reported by SNMP (and hence, by MRTG unless you
> do any of the things you might to reverse the presentation--see the docs)
> are with respect to the interface being reported upon as "viewed" from
> the center of the box.
> So, given something like
>             _________                 _________
>             |       |                 |       |
>  packet->ifA| box 1 |ifB---------->ifC| box 2 |ifD----->
>             |       |                 |       |
>             ---------                 ---------
> the packet will be reported as "input" on interfaces ifA and ifC and as
> "output" on interfaces ifB and ifD.
> Is that what you are seeing?
> The position of the MRTG station is irrelevant.  (In the case of much
> of the stuff I report upon, the MRTG station isn't even on the network
> for which the reports are made and "in" and "out" with respect to the
> MRTG station is beyond irrelevant apporoaching "undefined".
> (Looks like it to me--and to me it makes perfect sense--to show anything
> else would drive me nuts.)

ok now that you mention it thats right..i just have to get used to that
im looking at stats of the port on the switch not the port on the
machine hooked to that port.

thanks for clearin it up


ICQ: 75132336
aphro at aphroland.org

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