Extreme Networks has recently discovered an issue where certain revisions of line cards in a VDX8770-4 or VDX8770-8 may overheat and cause the switch to fail and become unusable.
Fortunately, there is a software fix available.
For more information and recommended mitigations, please review FN-2018-426, VDX8770 Line Card may Overheat Causing Switch Failure
If you have additional questions concerning this information, please contact your Extreme Networks representative.
The Extreme Quality and Services Teams