TCP/IP Illustrated, Vol. 1: The Protocols (Addison-Wesley Professional Computing Series)
Chapter 9. IP Routing
9.1 Introduction
9.2 Routing Principles
9.3 ICMP Host and Network Unreachable Errors
9.4 To Forward or Not to Forward
9.5 ICMP Redirect Errors
9.6 ICMP Router Discovery Messages
9.7 Summary
Exercises