Can not config full duplex on Gi0/1 of WS-C2960-24TC-L

[Chinh Duong]

Hi,

I have a problem when connect two modules GLC-FX-100FE to two switch WS-C2960-24TC-L as below:

When I plug each SFP module like above to each switch WS-C2960-24TC-L to SFP slot (gigabit 0/1: dual purpose port), then the duplex become to Haft.

So, I can not configure them to full duplex as other copper ports.

But when I use two switch WS-C3560G-24TS-S, I can do this.

OS version of WS-C2960-24TC-L I am using is: c2960-lanbasek9-mz.122-55.SE7.bin, I think it is new.

Please help me solve this problem.

I have to explain to our customer in the next morning. You know, I am Vietnamese and in Vietnam, the time is 22:40 pm,

Thank you so much.

[Chinh Duong]

Sorry, the modules are GLC-GE-100FX.

But by default, I can not change speed and duplex of two gigabit ports on switch WS-C2960-24TC-L although plug the modules or not.

Please help me.

[Rolf Fischer · Accepted solution]

Hi,

in interface configuration mode you have to configure

media-type sfp 

Afterwards you can configure media-specific parameters like the duplex mode.

Note: Changing the media-type will cause an outage for a couple of seconds.

Hope that helps

Rolf

http://www.cisco.com/en/US/docs/switches/lan/catalyst2960/software/release/12.2_55_se/command/reference/cli1.html#wp13646909

[Chinh Duong]

Thank you so much Mr Rolft.

I followed your steps guide and I fixed that problem.

Have a nice evening (in your country ), in Vietnam it is 6:30 am now.

Thank you so much.