Brocade Fabric OS v7.2.1a Release Notes v1.0

Closed with Code Change in Fabric OS v7.2.1a
Fabric OS v7.2.1a Release Notes v1.0 Page 37 of 55
Defect ID:
DEFECT000494570
Technical Severity:
High
Probability:
High
Product:
FOS
Technology:
Management
Reported In Release:
FOS7.2.0
Technology Area:
Firmware upload/download
Closed In Release(s):
FOS7.2.1a(Fixed)
Symptom:
Upgrading to FOS7.2.0c (which contains a fix for defect 491192) with pre-existing user-defined
logical switches may lead to fabric wide performance issue or hosts not being able to see targets after
a slot offline event .
Condition:
On FOS 7.2.0c, this affects Fabric IDs that do NOT contain a digit of 0, 1, 2, or 5; such as FID 3 or
FID 4. FID 35 would not be affected as it contains the digit 5.
Workaround:
Do not create or modify logical switches, or bounce ports until upgrading to a code revision with
fix.
Recovery:
Upgrade to a FOS release with the fix (v7.2.0d) will recover and also prevent future occurrence.
Downgrading from FOS 7.2.1 to a release with the fix (v7.2.0d) will not correct the problem and
v7.2.0d must be downloaded a second time after initial downgrade to v7.2.0d. Upgrade FOS7.2.1 to a
future 7.2.1a will address the problem. If a code upgrade is not possible, please use CLI
"portcfgdefault" on each port and then cold boot switch to recover.