I am trying to connect btween 2 switches on Fiber.
Switch 1 -
Model number: WS-C2924M-XL-EN on GBIC Port Fa 1/3
WS-C2960G-48TC-L on SFP port gig 0/48.
It is not coming up? NO LED at both side.
Need your input please.
It sounds like Switch 1 is a Catalyst 2924M XL with a 4-port 100Base-FX expansion module (model number WS-X2924-XL-V) installed in one of the modular slots above the 24 built-in 10/100TX ports.
They may look like GBIC ports because they accept patch cables with SC connector ends, just like GBICs do. However, those are Fast Ethernet fiber ports (100FX), not Gigabit Ethernet (1000SX, 1000LX/LH, etc.)
The 100FX ports operate over multimode fiber at a wavelength of 1300nm; and can go up to 412 meters in half-duplex mode, or 2000 meters in full-duplex mode.
If you are trying to connect Switch 1's interface FastEthernet1/3 to a fiber SFP in Switch 2, it will work IF and only if the SFP is one that supports Fast Ethernet (model number GLC-GE-100FX= or GLC-FE-100FX=).
If you are trying to connect it to a Gigabit Ethernet fiber SFP (such as GLC-SX-MM= which operates at a wavelength of 850nm over multimode fiber) it will not work.
If you use a 1-port 1000BASE-X uplink module (model number WS-X2931-XL) you can install a fiber GBIC in it and connect the old Catalyst 2924M XL switch to your new Catalyst 2960G-48TC switch. Just be sure to match the GBIC wavelength (SX, or LX/LH) with the SFP.