VRF-Lite: Complete configuration and explanation of behaviors, OSPF and EIGRP demonstration and how they work (or why the don’t work)

To note I used the same color I have previously for IPSec VPN tunnels, however that color is more just one of the few colors not reserved for protocols (as I generally use blue for OSPF, red for RIP, and orange for EIGRP), so this time green is for VRF-Lite. So I wanted to pull … Continue reading VRF-Lite: Complete configuration and explanation of behaviors, OSPF and EIGRP demonstration and how they work (or why the don’t work)

Part 6: Troubleshooting of sub-optimal routing via route-maps / redist/ policy routing, and an old friend OSPF distance comes to save the day! (GREAT review!)

Not /fin with this Topology of course, after this lab of fine tuning some sub-optimal routing I am taking copies of all "sh run" to be able to spin this lab up again if it ever gets the "wr er", however it will be /fin for review and onto the subject of VPN's. So, Part … Continue reading Part 6: Troubleshooting of sub-optimal routing via route-maps / redist/ policy routing, and an old friend OSPF distance comes to save the day! (GREAT review!)

Part 5: Turning “IP Routing” on for Layer 3 SW1, Policy / Local Policy Routing, found sub-optimal routing due to AD! (Will be 6th lab to troubleshoot)

I took a quick moment to post before this, advising not to study or lab tired, cause as can be seen towards the end of my Part 4 of this lab I am just tired and swinging at air. Anyway, we now have R1 and R3 both acting as ASBR's, with R1 doing 2-way route-tagged … Continue reading Part 5: Turning “IP Routing” on for Layer 3 SW1, Policy / Local Policy Routing, found sub-optimal routing due to AD! (Will be 6th lab to troubleshoot)

Part 4: The right ACL for the right job (Distribute-List vs Route-Map), Configuring 3-way Route Redistribution with a lot of failures but final success!!!

(Added interface #'s to the Topology as we increase working with both IP's and interfaces) I wanted to touch this quick before moving on to policy routing, whether Distribute-Lists can block certain networks from a Summary Route, or if it's possibly at all. So I'll run through it quick here to move on:   Distribute-List … Continue reading Part 4: The right ACL for the right job (Distribute-List vs Route-Map), Configuring 3-way Route Redistribution with a lot of failures but final success!!!

Part 3: DEEP Dive into Redistribution with Route-Map tagging, and Distribute-Lists illustrated for clarity!

(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!

Part 2: Deep Dive into EIGRP / OSPF / RIP Authentication, Route Summarization, OSPF troubleshooting to end lab!

Tonight I had a whole agenda of tasks to configure as much as I could on this network, however I was only able to demonstrate authentication configuration for all 3 protocols thoroughly, create a Summary Route for R5, and troubleshoot an OSPF issue that was a bit tricky to catch but finally got it (which … Continue reading Part 2: Deep Dive into EIGRP / OSPF / RIP Authentication, Route Summarization, OSPF troubleshooting to end lab!

Part 1: Setting up the new, bigger, and better lab to configure everything we’ve learned up to this point!

  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!

The extended traceroute command, and Local Policy Routing Configuration!

Still working with the same Topology seen above, I want to round off the Policy Routing videos to see if I can bring that into some scenario or freestyle lab, and see how crazy one can get with Policy Routing. The first thing to note that I have amazingly not known at all until this … Continue reading The extended traceroute command, and Local Policy Routing Configuration!

Using Extended ACL’s for Policy Routing to overcome sub-optimal routing

As seen in the previous look at policy routing using a standard ACL, it led to sub-optimal routing due to only routing on the source, and not both source and destination addresses - for this we will use an Extended ACL to correct. So I took the old commands off, nothing fancy: R1(config)#no access-list 5 … Continue reading Using Extended ACL’s for Policy Routing to overcome sub-optimal routing

Policy Routing with a Standard Access-list, sub-optimal routing (Ugh)

Due to some winter illness and the fact that I had to swap cables with my home production network to make this topology work, it took some time to physically put this all together, so getting it setup just to lab was quite the undertaking but once all said and done I have this to … Continue reading Policy Routing with a Standard Access-list, sub-optimal routing (Ugh)

Part 3: Finally got Route-Maps for Redistribution working correctly, important notes within on how!

Boy do I feel stupid. After spending hours of scratching my head at why this is not working yet, as OSPF seems to be gettings tags but RIP is not, that is when I really put my work under a microscope and found that I was applying OSPF2RIP in OSPF router config and the other … Continue reading Part 3: Finally got Route-Maps for Redistribution working correctly, important notes within on how!

Part 2: A struggle getting RIP on R1 to get any Redistributed OSPF, may need router reconfigs

So to begin this, right off the bat I am having trouble seeing some routes on R1 from R4, as I just did a "wr er" and reloaded / reconfigured it to be directly connected. However, on R4, things couldn't possible be going better, I created lo5 and lo15 to simulate those networks from the … Continue reading Part 2: A struggle getting RIP on R1 to get any Redistributed OSPF, may need router reconfigs

Part 1: Route-Map tagging for 2-way Redistribution, a prevention mechanism for routing loops!

Above is a "Single-Point 2-way Redistribution" in our network, which is honestly not going to (probably ever) present a loop from sharing or "leaking"routes back into their own domains, however route-tagging usefulness goes beyond just Redistribution as we will see it I assume in the next topic up PBR (Policy Based Routing / Policy Routing) … Continue reading Part 1: Route-Map tagging for 2-way Redistribution, a prevention mechanism for routing loops!

Part 2: Understanding Route-Map Sequence significance, Clauses, and lots of details to finish this Route-Map lab!

So where Part 1 of this lab left off, we learned that without that "catch all" clause at the end permitting traffic, then it is dropped like an ACL would. Going through the 2-way Redistribution video, I also learned that sequence #'s do also work exactly like ACL's, so you will want to plan your … Continue reading Part 2: Understanding Route-Map Sequence significance, Clauses, and lots of details to finish this Route-Map lab!

Part 1: RIP into OSPF 1-way Redistribution, Route-Map lab

Being that the two way redistribution training gets into route tagging and other fun concepts, I want to just get an easy lab configuration under my belt to get myself started, and will just be working with R3 and R4 as no other routers can see the OSPF routes except R3 after I do this: … Continue reading Part 1: RIP into OSPF 1-way Redistribution, Route-Map lab