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Cisco Bug: CSCuk62206 - static arp change not notified to CEF/ADJ

Last Modified

Mar 24, 2019

Products (1)

  • Cisco IOS

Known Affected Releases

12.2SR 12.4T

Description (partial)

None

Symptom:
Static ARP entries may not be correctly reflected in the CEF adjacency,
causing CEF and hardware forwarding to apply the wrong layer 2 encap to
packets, potentially causing packet loss or mis forwarding.

Conditions:
The problem only occur for static ARP entries, and is only known to be triggered
if the MAC string is changed on an existing static ARP entry.

Using <CmdBold>show arp<noCmdBold> and <CmdBold>show adjacency detail<noCmdBold>
you can verify if the encapsulation string of the adjacency contain the correct
MAC address for the ARP entry.
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Bug Details Include

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