The uplink cable needs to be a crossover cable to connect 2 switches
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Problem with connecting two switches
I have a NetGear 10/100 Switch and need to extend the net in one room. I tried to do this with a DLink DE805TP switch. (Actually, this is at a remote site and I can only make my "experiments" by hunting around some unskilled locals by telephone; hence some observations may require a grain of salt)
This setup should work if the link between the two switches is made via port 5 o fthe DLink and it is set to "uplink". Tried this, also tried setting "normal" and also tried putting the uplink cable in a normal port.
None of these produced a working network.
- Any host directly connected (i.e. instead of the Dlink) to the socket leading to the NetGear is immediately visible to the LAN
- Two hosts connected directly to the DLink can see one another
- A broadcast ping from the main network causes the Rx light of the DLink to blink accordingly (depending on "uplink/normal" setting), so there is at least *some* connectivity (i.e. they did not forget to plug in the other end of the cable)
Yet there is no connectivity between the hosts at the Dlink and those of the main network.
Any idea what might be the cause / what could be tried next?
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Answers
Both switches are "dumb", not managed. No VLANs.
The port 5 of the DLink is MDI/MDI-X (though they labelled the switch "normal/uplink" instead). The DLink manual gives an example of even several switched daisy-chained like this (though using only the same model several times - but that should only be for marketing reasons, shouldn't it?)
Was the inter-switch cable hand-made? Have you tested the inter-switch cable? I have seen some freebie cables (came with Qwest DSL kit) that were faulty. I have also seen many hand-made cables not 100% correct. Also, I have seen hand-pulled cable that was damaged. I don't know how they did it, but there was a break in one pair about 6 feet from the end.
Oh, and you can also have problems if you kink a Cat 5e cable (it loops while you are pulling it and you just keep pulling until the loop becomes a very tight little loop).
Probelm resolved.
In the end it tured out that my remote helper managed to not correctly plug the cable into the wall socket each time it ran to the switch, but correctly when it ran to a computer. Somehow the cables had what could be called different "click sensitivity". *Sigh*
I think the kinky cable hint matches this best, so it will receive my points ...
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by: stephenbyrdPosted on 2009-10-22 at 06:30:03ID: 25633899
Are you using a straight or crossover cable between the switches?