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Cisco Bug: CSCub16372 - Very rarely, ISR-G2 IOS cannot boot up with certain ROMMON versions

Last Modified

Feb 08, 2017

Products (1)

  • Cisco 3900 Series Integrated Services Routers

Known Affected Releases

15.2(1)T3 15.2(3.16)M0.7

Description (partial)

Symptoms: In extremely rare cases, an ISR-G2 cannot boot up with certain ROMMON
versions with the error "Signature did not verify". So far, only one image is
found to have this problem: c3900-universalk9-mz.SPA.152-1.T3.bin.

Conditions: The issue will happen when all three conditions are met at the same
time:

1. The platform is affected.
2. The ROMMON version running at the router is within the affected ROMMON 
version range.
3. The first calculated hash value is 0 during the IOS image building process.

Since it is extremely rare that the third condition will occur, so far only one
CCO image is found to have this problem.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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