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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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What Are Possible Causes for IPv6 Address Conflict on an Interface?

What Are Possible Causes for IPv6 Address Conflict on an Interface?

In V100R002 and later versions, the possible reasons for IPv6 address conflict on an interface are as follows:
  • The peer interface directly connected to the local interface has been configured with the same IPv6 address as that of the local interface.
  • After the inloop detection function is enabled on an Ethernet interface, the link local IPv6 address status of the interface is DUPLICATE, and the global unicast IPv6 address status of the interface is TENTATIVE (the address is a tentative address and does not pass the duplicate address detection). You can run the undo loopback command in the Ethernet interface view to disable the loopback detection mode on the interface.
  • Loops exist on the network.

By default, the device performs duplicate address detection after an interface is configured with an IPv6 address. You can run the display ipv6 interface interface-type interface-number command in any view to check whether the IPv6 address of the interface conflicts with other IPv6 addresses.

Updated: 2020-01-07

Document ID: EDOC1000060766

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