Weird networking issue.

Hi, this is kind of a newbie question but this doesn't make a whole lot of
sense :stuck_out_tongue:

I have an etherstack hub connected to a FastEthernet port on a cisco 3660
router, these are the stats when I do a show int fast0/0:

5776 input errors, 5776 CRC, 2717 frame, 0 overrun, 0 ignored

Whats weird is I just cleared the counters 12 minutes ago, and already there
are almost 6000 CRC errors. This connected via a standard Cat5 ethernet
cable, I have tried replacing the cable to noavail.

Is this a fairly normal situation, If so that's great, but it seemed rather
ridiculous to me, and if it is not a normal situation, what would cause
this?

Any ideas are appreciated.
Thanks,
-Drew Weaver

Hi there, no that is not normal. How long is the cat5 between the two?

Also, with a hub you should normally see collisions but not crc errors.

Rule number 1 with any ethernet: Check to make sure you have the duplex
and rate statically configured, and configured identically on both ends of
the connection.

I'd wager you've got half duplex set on one side, and full on the other...

  -Dave

On Tue, Jan 07, 2003 at 02:19:10PM -0500, Drew Weaver mooed:

"David G. Andersen" wrote:

Rule number 1 with any ethernet: Check to make sure you have the duplex
and rate statically configured, and configured identically on both ends of
the connection. [...]

  I'd like to thank Cisco for this piece of advice, as the only company
incapable of manufacturing Ethernet equipment capable of
autonegotiation. At least until 1999 or so.
  Yeah, there're a few others, all of which seemed to follow Cisco's
lead. Nutty.

Peter E. Fry

"Peter E. Fry" wrote:

[...] the only [...]

  Yeah, *that* is a nutty statement. I could re-phrase, but I think
most here get the intent.

Peter E. Fry

"David G. Andersen" wrote:
>
> Rule number 1 with any ethernet: Check to make sure you have the duplex
> and rate statically configured, and configured identically on both ends of
> the connection. [...]

  I'd like to thank Cisco for this piece of advice, as the only company
incapable of manufacturing Ethernet equipment capable of
autonegotiation. At least until 1999 or so.
  Yeah, there're a few others, all of which seemed to follow Cisco's
lead. Nutty.

Everything Cisco has to say on the subject:

-Hank
[Thanks Yaron :-)]