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Cisco Bug: CSCtf30966 - Bring down the links while switch is undergoing ungraceful shutdown

Last Modified

Mar 16, 2016

Products (3)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5020 Switch
  • Cisco Nexus 5010 Switch

Known Affected Releases

4.1(3)N1(1) 4.2(1)N1(1)

Description (partial)

Hardware diagnostics may mark an interface 'F' and "show interface" will show
the interface is "Down" due to "Hardware Failure", but link is still being

This might cause a delay in any failure mechanism of a connected device to
detect this failure.

A rare condition of a hardware diagnostic failure is required to trigger a
diagnostic failure.  If the port is marked 'F', but link is established by the
neighboring device, it is possible to have traffic sent to this logically down
interface.  This is referred to as a "black-hole" for traffic.
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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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