PODCAST

Cisco Hands On Training Podcast

Darrell Root

A video podcast showing Cisco hands-on training exercises.

technology software how-to

All Episodes

Introduction to BGP theory

Cisco Hands On Training Podcast ·

2008/03/15

An introduction to BGP theory.

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OSPF route filtering and area border routers

Cisco Hands On Training Podcast ·

2007/10/21

OSPF routes should be filtered or summarized at area border routers.

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OSPF distribute-list problems

Cisco Hands On Training Podcast ·

2007/10/07

OSPF's fundamental design is that all routers in an area have the same exact view of the network topology. This is fundamentally incompatible with filtering routes within an area. As a result OSPF distribute lists do not have the same effect as RIP distribute lists. In fact, using distribute-lists within an OSPF area is dangerous.

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Totally stubby and not-so-stubby OSPF areas

Cisco Hands On Training Podcast ·

2007/09/30

OSPF totally stubby areas and not-so-stubby areas are ways to improve OSPF scalability. But they can be very confusing.

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OSPF stub areas and neighbor synchronization

Cisco Hands On Training Podcast ·

2007/09/23

We cover OSPF stub areas and neighbor synchronization.

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OSPF Redistribution

Cisco Hands On Training Podcast ·

2007/07/31

We redistribute from RIPv2 into OSPF and introduce autonomous system boundry summary LSAs and external summary LSAs.

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OSPF Areas and Network Summary LSA's

Cisco Hands On Training Podcast ·

2007/07/16

We introduce multiple OSPF areas and network summary LSA's.

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Introduction to OSPF

Cisco Hands On Training Podcast ·

2007/07/01

We show a single area OSPF network and go into router and network link state advertisements (LSA's) in detail.

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Shortest Path First Algorithm

Cisco Hands On Training Podcast ·

2007/06/04

A brief tutorial on Dijkstra's Shortest Path First Algorithm. This algorithm is used by most link state routing protocols, including OSPF and IS-IS.

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RIPv2

Cisco Hands On Training Podcast ·

2006/09/22

RIP version 2 includes subnet information in the route advertisement. It also improves efficiency by multicasting to RIPv2 routers instead of broadcasting to all hosts.

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Migrating from RIPv1 to IGRP via route redistribution

Cisco Hands On Training Podcast ·

2006/07/25

If you run two different routing protocols in two different parts of your network, you need to redistribute routes between the two routing protocols. This session is an introduction to route redistribution by example.In production you must be cautious about route redistribution because the route metric is not converted in a meaningful manner. This can result in routing loops.

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Migrating from RIPv1 to IGRP via "ships in the night"...

Cisco Hands On Training Podcast ·

2006/07/10

"Ships in the night" routing refers to two routing protocols which do not interact with each other. We can migrate from one routing protocol to a more believable one by simply turning on the new protocol then turning off the old protocol. Bug be careful to turn the new protocol on in the entire routing domain before turning off the old protocol.

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IGRP: Interior Gateway Routing Protocol

Cisco Hands On Training Podcast ·

2006/06/29

IGRP is a Cisco-proprietary routing protocol. It is a classful distance vector protocol with a metric based on bandwidth and delay. This is superior to RIP, whose metric is based on hop-count. IGRP's classfulness makes it a bad choice for new deployments, but its advanced metric is worth study.

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RIPv1 distribute lists and offset-lists

Cisco Hands On Training Podcast ·

2006/06/21

RIP distribute lists deny specific route advertisements. RIP offset-lists increase the metric (hopcount) for specific route advertisements.

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Problems with RIP Version 1

Cisco Hands On Training Podcast ·

2006/06/19

RIP version 1 route advertisements do not include a field for the netmask. This means receiving routers have to gess the netmask based on whatever information they have available. That includes the "natural" netmask of that classful network. That also includes the receiving routers own configuration.This means that variable length subnets and discontiguous classful network have problems with RIP version 1. The lack of the netmask field in the route advertisement is a real problem.

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RIP Version 1

Cisco Hands On Training Podcast ·

2006/06/17

RIP version 1 is a classful routing protocol. We cover the RIP packet format and configuration. We see examples of split horizon and triggered updates using the RIP debug commands.

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Static routing and introduction to CEF

Cisco Hands On Training Podcast ·

2006/06/13

Routing protocols (and static routing) update the route table. The route table is used to forward packets. Cisco Express Forwarding (CEF) is a special route table optimized to forward packets more efficiently.

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Serial and ethernet point-to-point links

Cisco Hands On Training Podcast ·

2006/06/11

We cable and configure ethernet and synchronous serial point-to-point links. In the next session these will be the "legs" of our triangle.

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Classful IP addressing

Cisco Hands On Training Podcast ·

2006/06/08

Routers route packets based on the destination IP address: a 32-bit number included in the header of every IP packet. Historically, "large" sites were allocated IP address blocks starting with 0 (binary). Medium sites were allocated address blocks starting with the bits 10. "Small" sites were allocated address blocks starting with the bits 110.

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Cisco 2500 password recovery

Cisco Hands On Training Podcast ·

2006/06/03

Every network engineer needs to be able to deal with a router with an unknown password. Whether you are taking over a site where the previous engineer was "hit by a bus", or scrounging routers from the storage closet, good network engineers can deal with routers with unknown passwords.

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