Operational Defect Database
BugZero found this defect 931 days ago.
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Hewlett Packard Enterprise | a00119131en_us
Advisory: HPE B-series Switches - Early Compact Flash Failure Can Happen if Best Practice Recommendations Around CLI Scripting Are Not Followed
Last update date:
2/28/2024
Affected products:
Brocade 16Gb Fibre Channel SAN Switch for HPE Synergy
Brocade 32Gb Fibre Channel SAN Switch for HPE Synergy
Brocade 16Gb SAN Switch for HPE BladeSystem c-Class
Brocade 8Gb SAN Switch for HPE BladeSystem c-Class
HPE B-series SN6000B Fibre Channel Switch
HPE B-series SN6500B Fibre Channel Switch
HPE SN3000B Fibre Channel Switch
HPE Storage Fibre Channel Switch B-series SN3600B
HPE Storage Fibre Channel Switch B-series SN6600B
HPE Storage Fibre Channel Switch B-series SN6650B
HPE Storage Fibre Channel Switch B-series SN6700B
HPE Storage SAN Director Switch
Affected releases:
No affected releases provided.
Fixed releases:
No fixed releases provided.
Description:
Info
Frequent monitoring of switches through CLI scripting can lead to excessive use of the compact flash. Continued operation of scripting that causes frequent writes to the CLI history log can cause the compact flash to fail. The switch will become unusable if the compact flash fails. Scripting programs that log into a switch and issue commands, or multiple commands, to every port on a switch creates writes to the compact flash. Even if the monitoring CLI commands are "show" commands, a CLI history log will be captured and stored on the compact flash to track the activity. Frequent polling of multiple ports will create one CLI history log for every "show" command issued at the frequency of the polling script. This may cause the switch to hang and fault. At the next reboot, the switch may fail to come back online, including failure to come online after a firmware upgrade or other operation that requires use of the compact flash, and may include loss of console access.
Scope
All supported HPE B-series switches are affected by this issue.
Resolution
Review and implement the following "best practice" recommendations as required: Utilize "-all" option on "show" commands versus issuing a separate "show" command for every port on a switch. Reduce polling frequency when possible to reduce overall number of writes to the compact flash. Utilize the REST or SNMP interface to conduct regular polling. "Show" / "GET" commands issued from REST and SNMP are not captured in the CLI history log, and will not contribute to any extra compact flash writes. There will still be a single audit-log to record the successful log in from REST or SNMP; however, there will be only a single write regardless of how many "Show" or "GET" operations are performed. RECEIVE PROACTIVE UPDATES : Receive support alerts (such as Customer Advisories), as well as updates on drivers, software, firmware, and customer replaceable components, proactively in your e-mail through HPE Support Alerts. Sign up for Support Alerts at the following URL: Proactive Updates Subscription Form.
