16.4 BOOTP Server Design
The BOOTP client is normally provided in read-only memory on the diskless system. It is interesting to see how the server is normally implemented.
16.5 BOOTP Through a Router
We said in Section 5.4 that one of the drawbacks of RARP is that it uses a link-layer broadcast, which is normally not forwarded by a router. This require an RARP server on each physical network. BOOTP can be used through a router, if supported by the router.
16.6 Vendor-Specific Information
In Figure 16.2 we showed a 64-byte verdor-specific area. This area contains optional information for the server to return to the client.
16.1 Introduction
In Chapter 5 we described how a diskless system, with no knowledge of its IP address, can determine its IP address using RARP when it is bootstrapped.
16.2 BOOTP Packet Format
BOOTP requests and replies are encapsulated in UDP datagrams, as shown in Figure 16.1
Port Numbers
There are two well-known ports for BOOTP: 67 for the server and 68 for the client .
