06-11-2009 06:22 AM - edited 03-06-2019 06:12 AM
I am trying to uplink and form a etherchannel between the 3750 regular ports and 3548 regular ports. Could you please any one advise which cable I should be using ?
Note:When I was trying to uplnk 2960 to 3750, it worked with straight through.
06-11-2009 06:30 AM
Switch to switch traditionally meant you needed a cross over cable. Nowadays the switches can auto sense the cable and compensate so that's why your 2960 to 3750 worked.
However the 3548 is a considerably older switch and i don't think it supports auto mdix. So go with a cross over cable.
Jon
06-11-2009 06:35 AM
As Jon notes, newer switches often support auto mdix and should work with either cable type. Don't believe you need an auto mdix device on both sides of a link for it to work. I recall(?) on 3750, though, if "auto" isn't configured for speed/duplex, auto mdix isn't enabled.
06-11-2009 08:40 AM
Joe is correct 3750 supports mdix and you can use either cable "as long as the speed/duplex on the 3750" is set as auto , obviously you want the other end as auto also .
06-11-2009 10:25 AM
Thanks for your reply.
Why I asked this question because the uplink from 2960 to 3750 with Cross over cable in the etherchannel group does not work. I dont know why. It only works perfectly with Straight cables. I am going to test 3550/3548 to 3750. Hopefully it should work with cross cables.
06-11-2009 03:35 PM
Traditionally, you should use Cross-Over cable. But since MDI/MDIX is cheaper by the ton, the 3750 is MDI/MDIX capable.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: