This error indicates that iPXE timed out while waiting for an IPv6 Router Advertisement (RA).

Things to try:

  * Check that your router advertisement daemon is online and responding to requests.

  * After the failed IPv6 autoconfiguration attempt, check the output from the ''[[:cmd:ifstat]]'' command to see if iPXE is receiving any packets (the "RX" counter) or experiencing receive errors (the "RXE" counter).