Segmentation can happen in a fabric for various reasons.
Essentially, it is when the fabric divides itself.
Reasons this could happen.
- If you have dupicate FCDomain details
- Two prinicipal switches
- TOV mismatch -- BIG ONE
Link failing/flapping would cause a segmentation and perseive as a segmentation fault. Now that you have a failed link between your fabric switches, you will then have two different fcdomains and then two principal switches.
- link could be FCIP, ISL, etc..
Hope that helps.