Hi,
Here is a nasty little thought that might help. The AUI transceiver comes with the
SQE test (heartbeat) on. This has the effect of creating a collision type message
with each message. Some comms devices simply will not go with the SQE on. In other
cases the port will come up until it gets a little busy and then fail. Some devices
simply don't care. Always make sure however that unless you need the 'heartbeat' test
that you turn it off. It creates very difficult faults to find. (they are not faults
as far as the network is concerned). Just as a side this usually shows up as heaps of
collisions corresponding with CRC errors.
A thought,
Teunis,
Hobart, Tasmania
Australia
On Saturday, February 24, 2001 at 02:07:06 PM, Matt Wehland wrote:
> Hello,
> In my last message 'Thanks for the Archives' I mentioned that I had found
> the answer to my E0 'line protocol down' problem. Well I lied, although
> turning off keepalive with the command 'no keepalive' under the E0
> interface gives the 'line protocol up' message, the interface isn't really
> working, seems no keepalive is good if you don't have anything to plug the
> router into. I had the AUI transceiver connected to my no name 10/100
> switch. The tranceiver (LanArt)was showing link down (1 blink).
> I decided to plug it into my 1924 switch and it works fine.
> Made up a crossover cable and connected the 1924 to the no-name 10/100 and
> it works fine, also. I can connect from either the 10/100 uplink (25-26)
> or the regular 10MG ports (1-24)
>
> Why will the 1924 talk to the no name, but the 2501 won't?
>
> Is it possible something with the transceiver (I guess I could try the the
> same transceiver on the AUI port on the 1924 later)?
>
> Some other misc. questions
>
> I made up an ethernet loopback plug (RJ-45 with pins 1-3, 2-6) and plugged
> it into the transceiver on the 2501, still couldn't get the line
> up. Unplug the transceiver and plug it back in (resetting it) and it
> works, line protocol up.
>
> AUI transceiver loopback
> I read about this beast in the archives, anyone know of a pinout?
> Can it be used in place of a transceiver and a ethernet loopback?
>
> Thanks,
>
> Matt Wehland
>
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