Re: 6.2 and 3rd Party GBIC
I had the same experience. I had a link-light on the SFP port of the FortiSwitch, but not on the Cisco. I resolved this by adding the speed nonegotiation command to the Cisco port config and then changing the Fortinet port config from auto-negotiate to force 1000 full-duplex. After making these adjustments, the Cisco link-light was on and the port status showed up/up (before it was down/down), but there was still no traffic.
One other strange thing, although I could not pass traffic in the conventional sense, the Tx and Rx counters for both devices showed some packets were being transferred and that one device's Rx count matched the other's Tx count, and vice versa.
Also, the forwarding table on my Fortinet contained the MAC addresses of devices connected to all of my VLANs on the Cisco side. The Cisco switch I have been using is a production switch in my server room.
Perhaps I have raised more questions than answers. I have a current ticket open with Fortinet on my issue and I'm not letting go until I know what is going on. I will post again if I get anywhere.