Fundamentals

The documents shown on this page cover fundamentals concepts like neighbor resolution, databases and MTU.

IPv6 Router Solicitation/Advertisement Sequence & Address Resolution

Shows the basics of RS and RA exchanges in IPv6 as well as Address Resolution (the equivalent of ARP in IPv4).

MTU between IOS & XR

Both IOS and XR handle MTU configurations differently and this can cause mix-ups. This document is designed to clarify that confusion and show how the different implementations compare.

Packet Structure

This document gives a clear breakdown of layers 2 to 4 when looking at a packet.

Reading an SNMP MIB

Using mib 2 as an example, this document details how to read and interpret an SNMP MIB that uses the SMIv1 standard.

Router Tables & Databases

This diagram, whilst not exhaustive, gives an overview of the tables and databases that you would encounter when looking at a router within a service provider network. It also provides the corresponding Cisco IOS commands.

TCP/IP vs OSI Comparison

A simple comparison of the TCP/IP and OSI Protocol Stacks.