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Cisco Bug: CSCum68846 - N3K: ICMP unreachable/TTL exceeded pkt has same src ip and dest ip

Last Modified

Jan 30, 2017

Products (2)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3548 Switch

Known Affected Releases

6.0(2)A3(1)

Description (partial)

Symptom:Traceroute to a Nexus3000/3500 fails, as the ICMP packet sent out by the switch has same source and destination IP address.

E.g.,
A host with IP address 10.10.10.2/24 sends traceroute (UDP) to 10.10.10.1 (configured in N3K).
The ICMP port-unreachable sent out by N3K has source and destination IP address of 10.10.10.1.

Conditions:Nexus 3000/3500 running one of the affected releases.
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Bug Details Include

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