I had a lab setup that consists of 3 3512's that connect back to a 3508 via the GBIC ports. I had to relocate the lab, so I powered down the 3512's and installed them into the new facility. I confirmed that the fiber was terminated correctly so I connected the fiber to the 3512's and back in the closet to the 3508. Now I cannot get them to connect. There is no link light on either switch. I have tried different GBIC modules and differnet ports on both switches. Any idea how I can troubleshoot this or fix it? I reloaded the switch, I also copied over my backup config that I had, nothing works. I tried powering both switches down and bringing them back up, nothing. I have other switches connected to the 3508 and they work fine. Any ideas would be greatly appreciated.