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Document VersionRelease DateDetails206/06/2018Updated the Resolution with the DHCP information for the IRF links.105/24/2018Original Document Release.In HPE FlexFabric 5940 and 5950 Switch Series Intelligent Resilient Framework (IRF) fabrics with specific software versions, the IRF member may reboot unexpectedly if DHCP snooping is configured. The reboot cause is "KernelAbnormalReboot" as shown in thedisplay versionof the command output:This issue could happen if all of the following conditions are met:DHCP snooping is enabled on the IRF fabric.DHCP snooping trusted ports are configured on the IRF fabric.A large number of users in the network initiate DHCP requests to obtain IP addresses, or if there is heavy DHCP traffic with clients coming online and going offline.
Any of the following products with these releases:HPE FlexFabric 5940 Switch Series - software releases prior to and including version 5940_7.10.F2604HPE FlexFabric 5950 Switch Series - software releases prior to and including version 5950_7.10.R6125
This issue is fixed by upgrading to these software versions:NOTE: Backup current configuration and upgrade to the appropriate versions containing the fix.HPE FlexFabric 5940 Switch SeriesSoftware releases 5940_7.10.R2609 or higher (recommended)Software releases 5940_7.10.F2605 or higherHPE FlexFabric 5950 Switch SeriesSoftware hot patches 5950_7.10.R6125H01 or higherPlease contact HPE support for the hot patch. Refer to the hot patch release notes for installation steps.WorkaroundAs a temporary workaround, disable DHCP snooping on the IRF fabric.Software is available for download from the HPE My Networking Portal below. Review the release notes prior to performing software upgrades:https://www.hpe.com/networking/softwareHewlett Packard Enterprise Support CenterUser documents are available for download from the Hewlett Packard Enterprise Support Center website below:5940 Switch Series -https://support.hpe.com/hpesc/public/home/result?qt=59405950 Switch Series -https://support.hpe.com/hpesc/public/home/result?qt=5950NOTE:Products sold prior to the November 1, 2015 separation of Hewlett-Packard Company into Hewlett Packard Enterprise Company and HP Inc. may have older product names and model numbers that differ from current models.RECEIVE PROACTIVE UPDATES: Receive support alerts (such as Customer Advisories), as well as updates on drivers, software, firmware, and customer replaceable components, proactively via e-mail through HPE Subscriber's Choice. Sign up for Subscriber's Choice at the following URL:Proactive Updates Subscription Form.SEARCH TIP: For hints on locating similar documents on HPE.com, refer to theSearch Tips document.
Operating Systems Affected:Not Applicable
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