Preboot execution environment vendor container suboption

When supporting a preboot execution environment (PXE) client, the DHCP server passes the following option to the BINLD server, which is used by BINLD to configure itself.

The following example shows how this option can be used:

pxeservertype    proxy_on_dhcp_server

Vendor pxeserver
{
     option   7    9.3.4.68
}

In the above example, the DHCP server informs the client that the proxy server is running on the same machine but is listening on port 4011 for client requests. The vendor container is required here because the BINLD server broadcasts an INFORM/REQUEST message on port 67 with option 60 set to "PXEServer." In response, the DHCP server sends the Multicast IP address on which the BINLD has to listen for PXEClient's request.

In the following example, the dhcpsd server either gives the bootfile name to the PXEClient or it directs the PXEClient to the BINLD server by sending suboptions. The pxeboofile keyword is used to create a list of boot files for a given client architecture and major and minor versions of the client system.

pxeservertype     dhcp_pxe_binld

subnet default
{
     vendor pxe
     {
         option 6 2    # Disable Multicast
         option 8 5 4 10.10.10.1 12.1.1.15 12.5.5.5 12.6.6.6\
                  2 2 10.1.1.10 9.3.4.5 1 1 10.5.5.9\
                  1 1 9.3.149.15\
                  4 0
         option 9 5 "WorkSpace On Demand" 2 "Intel"\
                  1 "Microsoft Windows NT" 4 "NEC ESMPRO"
         option 10 2 "Press F8 to View Menu"
     }
     vendor pxeserver
     {
         option 7 239.0.0.239
     }

}

subnet  9.3.149.0  255.255.255.0
{
     option 3   9.3.149.1
     option 6   9.3.149.15

     vendor pxe
     {
       option    6    4    # bootfile is present in the offer packet
       pxebootfile   1   2   1   os2.one
       pxebootfile   2   2   1   aix.one
     }
}

Each option line in PXE container is used by the server to tell the client what to do. PXE vendor container suboptions describes the currently supported and known PXE suboptions.