Cisco Hands On Training Podcast - podcast cover

Cisco Hands On Training Podcast

Darrell Root•www.ciscohandsontraining.com
Technology
Software How-To
A video podcast showing Cisco hands-on training exercises.
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Episodes

Migrating from RIPv1 to IGRP via route redistribution

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.

Jul 25, 2006

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

"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.

Jul 10, 2006

IGRP: Interior Gateway Routing Protocol

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.

Jun 29, 2006

Problems with RIP Version 1

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.

Jun 19, 2006

RIP Version 1

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.

Jun 17, 2006

Static routing and introduction to CEF

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.

Jun 13, 2006

Classful IP addressing

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.

Jun 08, 2006

Cisco 2500 password recovery

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.

Jun 03, 2006

Scrounging Cisco Gear and Using the Console

You can best take advantage of the Cisco training podcast series by getting routers and following along. First you need to scrounge or buy routers and cables. This episode helps you decide what to get. This episode also explains how to access the console.

Jun 02, 2006
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