Why are duplicate checks for our local IPv6 addresses failing in our environment?

Solution Unverified - Updated -

Issue

Environment with cloned virtual machines experiencing constant problems with IPv6 DAD checks.

Many of these are being generated during network initialization.
ipv6: duplicate address check failed for the fe80::XXXX:XXXX:XXXX:XXXX/64 lft forever pref forever lifetime 6685-0[4294967295,4294967295] dev 2 flags tentative,permanent,0x8 src kernel address
kernel: IPv6: eth0: IPv6 duplicate address fe80::XXXX:XXXX:XXXX:XXXX detected!

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content