No network connectivity on client computers when a DHCPv6 message is sent that has a duplicated DUID

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Consider the following scenario:

  • You use a DHCP unique identifier (DUID) as a unique identifier in a network environment.
  • You use DUID and cable modem identifier mapping in the network.
  • You have client computers that are running Windows 7 or Windows Server 2008 R2 in the network environment.
  • One of the client computers sends a DHCPv6 message from a cable modem.
  • Another client computer sends a DHCPv6 message that has the same DUID from a different cable modem.
  • The record for the new DUID and cable modem mapping overwrites the previous record.

In this scenario, the client computers have no network connectivity.


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