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Cisco Bug: CSCta28249 - ICMP Unreachables (Type 3) denied with inspect icmp error

Last Modified

Nov 08, 2016

Products (2)

  • Cisco ASA 5500-X Series Firewalls
  • Cisco ASA 5580 Adaptive Security Appliance

Known Affected Releases

7.0 8.0

Description (partial)

  The ICMP errors "Unreachable, Fragmentation needed but DF is set" are denied
by the firewall even for the existing connections unless explicitly permitted
by the ACL.
  A link with the smaller MTU in the path that is sending the ICMP Unreachable
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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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