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Connecting two switches through a fiber cable

jmeeidel_net1
Level 1
Level 1

Hey guys...

I have a basic knowledge of network and need some help.

I need to connect a single 3750G - 48 ports switch to a single 2960 - 48 ports switch and it needs to be through a fiber. So, PCs connected to one switch would reach the PCs from the other switch.

I see that the 3750G switch has (What I believe is) 4 SFP ports and the 2960 has 2 SFP ports.

Well, I have erased (write erase) the configuration of both switches, so they have the default cisco config.

I have plugged in the SFP transceivers at both switches and used a LC fiber to connect them.

I saw that the Vlan1 was down (sh ip inter brief). So, I did a no shut at interface VLAN 1 on both swtiches...

However, the lights are still off on both SFP ports.

Do I need to configure anything on the switches to make them see each other?

Because if I use a simple UTP 5e cable to connect them I don´t need to do anything. They just start seeing each other... Do I need to do something special when using these SFP connections?

I also don´t know the SFP part numbers I´m using on them...A guy who works with Cisco gave them to me and said it "should" work.

So, I don´t know if it´s a configuration problem, a SFP model problem or both??

Any help is appreciated!

Thanks

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