trunking between 2960X 48p - 2960x 24p error

[thanh.do2906]

Dear all,

I have a problem when trunking between sw 2960x 4p - 2960x 24p , i use only 2pairs : 1,2,3,6 .

with cable i trunking 2960x 4p- 2960s ttl is ok.

pls help me that problem .

Thanks all ?

[Jay Lohano]

Hi,

Can you share the running configuration for trunk ports on both switches and "show interface trunk". 

Cant you use a normal cable with all pairs?

-Jay

[Masoud Pourshabanian]

Hello,

 If you used fastethenet for trunk, only 2 pairs are actually used for data transmission which you mentioned.

Pins 1$2 for transfering signals and 3$6 for receiving signals. And you can use both straight and cross-over cable since switch detects and adjusts transmitter and receiver.

Hope it helps,

Masoud