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Cisco Bug: CSCuk45764 - Removing IPv6 uRPF config with ACL when CEF is running causes crash

Last Modified

Mar 01, 2018

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

Symptoms: router crash.

Conditions: happens when running IPv6 CEF and uRPF on an interface.  If uRPF
has an ACL, and uRPF is unconfigured, the router will crash.  Happens on all
Cisco routers running IOS releases 12.2S or 12.3.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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