For those who have forgotten how LSA's work between Area's, let us refresh your memory: Type 1 and 2 LSA's live within their own Areas to create the SPF Tree ABR's extract the Network / Subnet Mask information to create a Type 3 LSA which it then floods into the other Area (Summary LSA in … Continue reading OSPF: Route filtering between Areas (Inter-Area) configured and explained!
Only the NBMA and Ethernet segments will be used for quick demonstrations and clarity, unless R4 or R5 is needed for demonstration. Now the idea of a Prefix-List in comparison to an Access-List may be hard to follow, but I will try to explain it. An Access-List at its most specific (Extended) matches only on … Continue reading EIGRP: DEEP Dive into Prefix-List configurations, Access-list vs Prefix-list, using Prefix-Lists to Filter EIGRP routes with Distribute-Lists!
Only the NBMA and Ethernet segments will be used for quick demonstrations and clarity, unless R4 or R5 is needed for demonstration. The first mechanism specifically for EIGRP to filter EIGRP learned routes is by distribute lists, which have a similar syntax structure and function in ways as an offset-list, in the ways that: It … Continue reading EIGRP: DEEP Dive into Route Filtering with Distribute-Lists using ACL’s – Important notes on using Extended ACL’s for exam day!
One thing that was lacking from Chris Bryants training that I found in the INE series is explanations between when to use OSPF Filter-list vs a Distribute-list. I have modified the network as reflected in the Topology so Area 34 will no longer be a stub, and Area 15 will only be an NSSA Area. … Continue reading OSPF: DEEP Dive – Distribute-List vs Filter-List, and reviewing Prefix-Lists as Filter-Lists use Prefixes to filter!
(The title may be misleading as ACL's will only be used for Distribute-List configuration) As seen above I have though out how to keep all the route tagging that will need to occur straight in my mind, so the route tags for EIGRP will be their AS #'s, and OSPF / RIP will be using … Continue reading Part 3: DEEP Dive into Redistribution with Route-Map tagging, and Distribute-Lists illustrated for clarity!
As previously mentioned I believe, this will be a multi-part lab in which I will configure "Multi-Point" 2-way Redistribution / Policy-Routing / Distribute-Lists / Route-Maps / and troubleshooting all along the way. Here are a few things I know I want to achieve over the several parts of this lab: Authentication deep dive for … Continue reading Part 1: Setting up the new, bigger, and better lab to configure everything we’ve learned up to this point!
Being that this lab is already set (see previous post), my EIGRP routes are all showing on R2's ABR R3 as shown below, I am going to write a couple of of Distribution lists. A main point again about Distribute-Lists: You can have more than one, but the more specific dist-list always takes precedence So … Continue reading Finishing look at Distribute-List’s, back to Myself Inc Topology with my new knowledge!
So I must preface this by saying it is the most beautiful day MN has seen in weeks, the sun is out and it's probably mid-high 20's, so it is the perfect day to open the shadows to let the sun in and sit in front of the command line! Ran out and got some … Continue reading Setting up EIGRP to OSPF Redistribution lab, excellent review of concept for exam day
So I am really reeling it back in here, as I think I got over ambitious without learning the basics, so I am just going to do a simple configuration here. For R2, I want to make a Summary route based on the following network numbers: interface Loopback1 ip address 188.8.131.52 255.255.255.255 interface Loopback101 ip … Continue reading Configuration of “Distribute-List”s and 1-way redistribution, with success!!
So after spinning my tires thinking of how to make it work on my very awesome looking Topology from the previous post, I just need to know this works in general for my own sanity. As can be seen, the above Topology is as easy as it gets, I am humbly stepping back, and admitting … Continue reading Physical cabling issues, Distribute-List issues, what is it Monday again??
As the Topology shows, with all the Branch Offices and Departments, IT just got real! Concepts will be learned on pieces of this network, will continue to be built out and troubleshot using different methods, and will eventually be using this similar Topology to create scenarios and try to avoid dry lab manuals if possible … Continue reading Distribute-List’s, ACL’s, and a shiny new Topology for practice scenarios for both Distribute-List’s and Route-Map’s