Can only the 100Mbs part of a 10/100Mbs router fail?
Larry Cook
lcook at sybase.com
Wed Dec 8 11:38:01 EST 2004
Dan,
Thanks for your repsonse.
> In one case it was a bad patch cable. The cable worked at 10Mbps but not
> 100Mbps. I didn't try to determine why. Just replaced it.
I've tried three different cables directly connecting computer #2 and the
router. No difference.
> In some cheap 10/100 switches, the entire switch has to back down to 10,
> if any 10 device is attached.
That does not appear to be the case with my Actiontec DSL-Modem/Router.
Computer #1 has always been 10Mbs and computer #2 has always auto-sensed to
100Mbs (according to it's indicator lights).
> I've seen 100 equipment fail to
> communicate because the link negotiation fails.
In those cases, did the status light indicate it has auto-sensed to 100Mbs?
> I've had network connections negotiate one speed and fail to communicate
> on it. I've replaced either the network card or the switch to solve.
Okay. That sounds like my problem.
> As someone mentioned, the connection between the 10 and 100 networks in
> the switch may have failed.
Okay. That could be the reason I get no communication.
> None of the ones I've seen were worth the effort of identifying the
> cause since all were with real cheap equipment. Swapping out was more
> economical than finding the underlying problem.
Yes, I agree. Even if I find the underlying problem in the router, it's
probably not "fixable". I really just need to confirm the router is the
problem. Based on the responses so far, it appears that it could be having a
100Mbs only problem.
> But, yes, I've seen the 100Mbps part of a switch fail, but 10Mbps still
> work. I've used the failing switch elsewhere in our in-house network
> just for 10Mbps equipment. It would not successfully connect to 100Mbps
> devices. Eventually it just died completely.
Maybe mine is on it's way out too. A ping of the router was showing 30-60%
packet loss from a 100Mbs computer. Now I have 100% packet loss from a 100Mbs
computer.
Thanks,
Larry
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