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Cisco Bug: CSCvu58749 - CDB silent reload caused by I2C bus hung due to insufficient time delay

Last Modified

Sep 23, 2020

Products (1)

  • Cisco Catalyst Digital Building Series Switches

Known Affected Releases

15.2(6)E1

Description (partial)

Symptom:
CDB switch reloads silently without any crash file. Some time below logs appear on the console before going for a reload

mvTwsiRead: mvTwsiStartBitSet Failed 14

timeout happenedmvTwsiWrite: mvTwsiAddrSet failed: 14
mvTwsiWrite: StartBitSet failed: 14

Restarting TWSI
mvTwsiWrite: StartBitSet failed: 14

Restarting TWSI
mvTwsiWrite: StartBitSet failed: 14

Restarting TWSI
mvTwsiWrite: StartBitSet failed: 14

Restarting TWSI
mvTwsiWrite: StartBitSet failed: 14

Conditions:
Random event and can occur anytime. We have seen issue occurring from switch bootup as well as with 2 weeks of switch uptime.
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