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Cisco Bug: CSCuk61467 - CEFv6 forwards a packet which source address is a multicast

Last Modified

Aug 06, 2018

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

A Router running CEFv6 forwards traffic with a multicast source address.
CEFv6 only checks if the source address is a link-local to punt the packet.
So, packets with the loopback (::) or the unspecified addresses (::1)
are also forwarded.

This is only seen with CEFv6 enabled.
A router which is not configured for CEFv6 will drop these packets.
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  • Full Description (including symptoms, conditions and workarounds)
  • Status
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