[nsp] single-col, multi-col, 6509

[sthaug at nethelp.no]

> Compare the number of single collisions to the total number of
> packets output.  If you're getting more than 1 collision per 100
> packets output, it's probably overloaded.

Sorry, collision rate doesn't work that way. If you have a half
duplex segment, collisions are expected - and 20% or 50% could
be just fine. It all depends on the total amount of traffic you
have on your half duplex segment - *this* is the interesting
number, not the collision rate.

> Like the others
> mentioned, check for any duplex mismatches, or FCS errors on either
> side.

Good points.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no