Chapter 8. ARP and IP Analysis
In this chapter we will cover the following issues:
- Analyzing connectivity problems with ARP
- Using IP traffic analysis tools
- Using GeoIP to look up physical locations of the IP address
- Finding fragmentation problems
- Analyzing routing problems
- Finding duplicate IPs
- Analyzing DHCP problems
Introduction
In this chapter we will learn how to analyze Layer 3 (IP) and Layer 3 to Layer 2 resolution (ARP). We will discuss the Internet Protocol (IP), Address Resolution Protocol (ARP), Dynamic Host Configuration Protocol (DHCP), routing issues and others, and the problems that you might face while troubleshooting these protocols.
We will start with presenting the protocol's normal behavior for the various protocols and continue with showing what can go wrong and how to solve it.
In general, when we analyze a network problem, we will go bottom up: if you cannot get connectivity, look for the problem in the following order:
- Layer 1: Check if the cable is connected and...
