This error indicates that iPXE timed out waiting for a response from the DNS server.

Things to try:

• Check that the DNS server is online and responding to queries.

• Check that iPXE is using the correct DNS server. You can check the DNS server address using the command show dns. For example:

    iPXE> dhcp
    DHCP (net0 52:54:00:12:34:56).... ok
    iPXE> show dns
    net0.dhcp/dns:ipv4 = 10.253.253.1