On Apr 23, 2:06am, "Bradley J. Wilson" wrote:
}
} The users who were directly connected to the switch had no problem accessing
} the network and Internet. The users on the hub were dead in the water. We
} tried swapping out the cable between the hub and switch, tried plugging
} either end into different ports, tried flipping the MDI/MDI-X switch, and
} nothing worked. The only thing that *did* work was using a *crossover*
} cable between the hub and the switch.
The MDI/MDI-X switch should have worked unless it was for a
different port, or you had a bad cable.
} Now, the rule (which I gleaned from this newsgroup, btw) is that when you're
} connecting devices at different OSI layers, you use a straight-through -
} e.g. PC to hub, PC to switch, switch to router, hub to switch - that's all
} straight-through. You use a crossover when you're connecting devices at the
} same OSI layer - router to router, switch to switch, hub to hub, PC to PC.
That rule is wrong. A correct rule would be:
hub/switch to hub/switch -- use crossover
hub/swtich to anything else -- use straight-through
anything else to anything else -- use crossover
} In the situation yesterday, a straight-through seemed logical, as we were
} trying to connect a hub to a switch. Am I wrong here? Why did the
} crossover work?
If the rule was right, then what you did would have been correct.
But, since the rule is wrong, all bets are off.
}-- End of excerpt from "Bradley J. Wilson"
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
