RFC 1812

Requirements of IP Version 4 Routers

This lengthy document describes, in great detail, the expected behavior for an IP routing entity; with the current Version 4 IP protocol. This is not an easy document to read - there is a tremendous amount of detail; but, it is a 'bottom line' on IP router behavior. Use your browser BACK button to return to this page when you are done with the document. You should be able to begin reading the downloaded document in about 10 seconds although the entire document will require about 80 seconds to download.

Read RFC 1812