Have 5 cisco switches
1 Cisco 3512
2 Cisco 3548
2 Cisco 3550
Up until last week, I only had 1 3550 for a total of 4 switches. These 4 switches were all connected via the GBIC interface, with the cable that looks like a firewire cable.
Now I'm trying to install this newest 3550. I want to hook it up to the existing 4 switches by means of the same type of GBIC interface. However, as soon as I hook up the GBIC's and power on the new switch, it immediately takes one of the other switches offline. (Haven't narrowed down which one yet).
I should also mention that the existing 4 switches are setup as a cluster, with the existing 3550 as the cluster commander.
I've already connected to the new switch via the console port, gone through the initial setup, assign a unique IP address, setup passwords and so on.
Currently the new switch is up and running, but it's connected to the existing switches via a normal CAT 5 cross-over cable, through one of the ordinary ethernet ports. This will work, but needless to say, transfer speeds won't be great once this switch becomes loaded.
So basically, I need to know what kind of limitations come with the GBIC interface method. Is what I'm trying to do even possible? If so, what am I doing wrong?