07-25-2018 07:27 AM - edited 03-08-2019 03:44 PM
Hi all,
I need to understand the speed and duplex settings of the port. I am trying to hard code the speed and duplex settings of the interface which apparently seems a simple procedure. So far what i have learned is you can hard code the interface speed and duplex settings. But in my lab i have the following situation.
Status "notconnect"
SW-3560 <-----------------------------> SW-2960
speed 100 speed 100
duplex full duplex full
Status "notconnect"
SW-3560 <-----------------------------> SW-2960
speed 100 speed 100
duplex auto duplex auto
Status "notconnect"
SW-3560 <-----------------------------> SW-2960
speed auto speed auto
duplex full duplex full
Status "connected"
SW-3560 <-----------------------------> SW-2960
speed 100 speed auto
duplex full duplex auto
****** no "DUPLEX MISMATCH DISCOVERED" log messages ******
Status "connected"
SW-3560 <-----------------------------> SW-2960
speed auto speed 100
duplex auto duplex full
******* "DUPLEX MISMATCH DISCOVERED" log messages on both switches ******
**** if i run "sh controllers ethernet-controller fa 0/4" command on both switches. I can see collisions on 3560 interface in the "TRANSMIT" column and similarly on 2960 in the "RECIEVE" column.
Ports on both these switches are 10/100 capable.
I have tried to go through books, cisco online documents and previous community threads but so far i could not find anything which can explain this behaviour of the interface.
Any idea why is this?
Many thanks.
Solved! Go to Solution.
07-26-2018 04:28 AM
07-26-2018 05:07 AM
07-26-2018 06:03 AM
07-26-2018 08:07 AM
07-27-2018 04:22 AM - edited 07-27-2018 04:25 AM
Hi @Leo Laohoo and @Joseph W. Doherty
You were right. With the crossover cable, there is no issue when I change the speed/duplex of the interface. Thank you for your help.
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