Here's how communication between Etherlite and Host looks during a DgIpServ session:

1. Power-cycle EtherLite

2. EtherLite sends DHCP Discover broadcast with
     EL MAC address
     All IP addresses set to 0.0.0.0

3. Host (running DGIPSERV) sends BOOTP/DHCP Packet with
     EL MAC address
     EL assigned IP address
     Host IP address
     Firmware file name
     Gateway address set to 0.0.0.0

4. Host sends DHCP Discover broadcast with
     same parameters as in 3.

5. EtherLite sends ARP REQ with
     EL address as senders address (MAC & IP)
     EL address as target address (IP)

6. Host sends ARP REPLY with
     Host address as senders address (MAC & IP)
     EL address as target address (MAC & IP)

7. EtherLite sends ARP REQ with
     EL address as senders address (MAC & IP)
     Host address as target address (IP)

8. EtherLite sends TFTP REQ

9. Host sends data packet (firmware file)

10. EtherLite ack's data packet [...]

This document is written so that users of the DgIpServ utility might better understand how it works, and where problems might occur if it doesn't work as expected. 

Related Information: