Tutorial: Filtering Routes in OSPF Part 1 » Filtering Within An Area

In addition to knowing all the different OSPF Network Types and how they relate to Frame-Relay, a CCIE candidate must be familiar with the different methods of filtering routes in OSPF. This two part series of tutorials will focus on filtering routes in OSPF, both within an area and between areas. This tutorial will focus on filtering routes within an area using distribute-lists, access-lists and using a route-map.

Tutorial: Time-Based ACLS

Time based ACLS are useful when you want to restrict traffic based on time of day. For example, you might employ time based ACLs if you wanted to only allow web surfing during a particular time of day or allow access to a server during work hours. We will be exploring these scenarios in this tutorial.

QOS: Configuring Policing using the access-list rate-limit command

Let’s say you have a scenario that says we want to configure R2 such that all inbound traffic marked with an IP precedence of 5 and 3 should be limitied to a maximum of 1Mbps. Anything above this rate should be discarded.

Sounds simple enough. What are the different IOS tools that you can accomplish this?

Mock Lab 6 Analysis - RIP Summary Address and Default Routes

I ran into this strange problem while doing Mock Lab 6, and I thought it warranted an article because it highlights why the order of operations that IOS performs certain tasks is important.

Multicast: What is the difference between an igmp filter and an igmp access-group?

After doing IE Mock Lab 5, and analyzing it over the last few days, I had an epiphany with regards to an igmp filtering question. The question required you to limit users joining a certain multicast group, and also place a limit on how many groups users in that vlan can join. I immediately thought “Oh cool, no problem ip igmp access-group with a standard access list, and an ip igmp limit and we are good to go! This stuff is easy”. Brrr! Wrong! :)

VLAN Access Lists

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