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Cisco Bug: CSCuw56950 - Cat3850 kernel panic due to bad socket buffer

Last Modified

Feb 13, 2019

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

Catalyst 3850 switch may reload unexpectedly and will resume normal operation after the reboot.

The crash is a kernel panic, which will produce a file named "kernel.rp_1.core.gz" or similar in the flash:/core directory of the affected switch.

The crash appears to occur due to a bad socket buffer, which is a data structure internal to the Linux kernel underneath IOS-XE. Exact conditions necessary to trigger this issue are currently unknown. This document will be updated if and as further information is known.
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