no uplink 3300SM & 3300MM

[Snakeaj]

hi
here i am again

i have a new problem:

both switches work fine, and i can manage them in different ways. (console and web)
BUT when i want to uplink one switch to the other then i get no connection (when i use a normal patch cable)
if i use a cross over patch cable then i get connection!

what could it be?
what setting is responsible for that?
where can i set this up?


thx ppl

cu
alex

 

[ADB100]

Thats just how it works, accept it.
The Ethernet ports on a switch (or hub etc) are presented DCE whereas a PC or other end device is a DTE and a straight cable will work (Pins 1&2, 3&6). If you connect 2 switches together then you are connecting 2 DCE devices and you must cross the Transmit and Receive pairs over:

10 or 100BaseT Cross-Over Cable Spec
1 - 3 White/Orange
2 - 6 Orange
3 - 1 White/Green
6 - 2 Green

Gigabit Ethernet over Copper (1000BaseT) uses all 4-pairs of wires in a standard patch-cable (258A/B) and has more intelligence built in. It can swap the transmit and receive legs over internally so a straight cable will work for this. 10/100/1000 Copper ports DON'T have this extra intelligence and a 1000BaseT Cross-Over cable is needed:

1 - 3 White/Orange
2 - 6 Orange
3 - 1 White/Green
4 - 7 Blue
5 - 8 White/Blue
6 - 2 Green
7 - 4 White/Brown
8 - 5 Brown



Andy