>>Start HTTP(s) Boot over IPv4....
          Station IP address is 192.168.15.217
         
          URI: https://mirror.stream.centos.org/9-stream/BaseOS/x86_64/os/EFI/BOOT/BOOTX64.EFI
         
          Error: Could not retrieve NBP file size from HTTP server.
         
          Error: Remote boot cancelled.

option architecture-type code 93 = unsigned integer 16;
 
subnet 192.168.15.0 netmask 255.255.255.0 {
    option routers 192.168.15.254;
    option domain-name-servers 192.168.15.3, 192.168.15.4, 192.168.15.5;
    option domain-name "mydomain.tld";
    option ntp-servers ntp-01.mydomain.tld, ntp-02.mydomain.tld;
    use-host-decl-names on;
 
    class "httpclients" {
        match if substring (option vendor-class-identifier, 0, 10) = "HTTPClient";
        option vendor-class-identifier "HTTPClient";
        #filename "https://192.168.15.1/redhat/EFI/BOOT/BOOTX64.EFI";
        filename "https://mirror.stream.centos.org/9-stream/BaseOS/x86_64/os/EFI/BOOT/BOOTX64.EFI";
    }
 
    group {
        ...
    }
 
    group {
        ...
        host myserver-01.mydomain.tld {
            hardware ethernet 12:34:56:be:84:46;
            fixed-address 192.168.15.217;
        }
        ...
    }
}