IGPs & LAN

This documentation shows OSPF, IS-IS and EIGRP configurations as well as several technologies you would typical find in a LAN environment, like HSRP and etherchannel.

EIGRP Authentication

A handy diagram showing the steps necessary to configure EIGRP authentication.

Etherchannel

This document gives a good cheat-sheet style overview of Etherchannel technology, showing the configuration of both PAgP and LACP.

First Hop Redundancy Protocols

A summary table showing FHRP protocols and their characteristics. Handy for comparing the different technologies.

IGP Neighbor Requirements

Useful mnemonic device to help remember the neighborship requirements for OSPF, EIGRP and IS-IS neighbours. MMANNTRAPS.

IS-IS Authentication

Example configuration for how to configure IS-IS MD5 Authentication for both IIH packets and for LSP, PSNP and CSNP packets.

IS-IS Neighborships

IS-IS is a common IGP used in Service Provider networks. This document shows how neighborships are formed and databases are synchronised for both Broadcast and Point-to-Point networks.

OSPF LSA Types

A reference sheet for all the OSPF LSA Types supported by Cisco with details of their contents, scope and general usage.

OSPF Authentication

A snapshot of how to configure OSPF neighbor/area authentication and encryption. This document covers both OSPFv2 and OSPFv3 for both IOS-XE and IOS-XR.

OSPF Stub Area Types

A quick reference view of the different OSPF Stub Area types, how they’re configured and what LSAs are flooded where.