I have a confession to make - While studying MPLS I largely overlooked the configuration of the Provider Edge because of its complexity and ease of breaking all routing (and probably reversing time). I intentionally used my MPLS Lab for ENARSI 300-410 study with new IP Schemes / CE Protocols to challenge my knowledge of … Continue reading MPLS – A necessary closer look at the PE Router settings (VRF / BGP / VPN / Address Family) to see how to setup for new lab!
This won't be a real long lab, as its more just removing OSPF as the WAN, configuring the ISP Router with point to point static routes to each site, then adding a single default route out to the Internet like you would any site in the Front Door VRF and associating both the Physical and … Continue reading DMVPN w/ Front Door VRF – Finally got it with static routing instead of trying to use OSPF over the WAN to form Adjacencies!
I have to honestly say, I am so relieved (for now) to have this smaller Topology to demonstrate how and why Front Door VRF's work, why they work and why we care about them at all when no Cisco training material mentions them. Warning - This is another post that doesn't really teach you how … Continue reading DMVPN / Front Door VRF – A long lab of trying to get this to work, but it is fighting me all the way, to be continued…
Above is a graphic of my own Meraki stack at my home, however this will only be reviewed in discussion of network "Planes" before we close out MPLS discussion 🙂 In this final MPLS post I wanted to first get a very clear understanding of Management Plane vs Control Plane vs Data Plane, then take … Continue reading MPLS – Detailed look at “Planes” in the network, MPLS L3 VPN traffic flow reviewed through Wireshark, and how Import / Export VRF functions work!
After taking a step from this lab to think about what is logically needed to make this work, I realized there is no "Redistribution" propagating routes over the L3 VPN between Customer A Site 1 / Customer A Site 2, so they have no idea how to respond to each other. The confusion in this … Continue reading MPLS – Finishing up Redistribution / Connectivity between Customers over the MPLS / L3 VPN, a review of everything learnt up to this point, and all running configs published for future review!
Above is the full scope of the Topology that will be configured by the end of this, utilizing all different protocols for CE to PE, mainly to demonstrate it flexibility with accepting IGPs for all walk of life which is what this blog is all about 🙂 NOW, I had went ahead and used Keith … Continue reading MPLS – Now to apply the Network Ninja troubleshooting to get these CE Routers talking across the MPLS Network!
This will be sort of the beginning of the end of the this MPLS series I am going through, Layer 3 VPN is really the last piece of "Cisco Magic" happening on the Provider Edge routers at work, segregating customer traffic on the same device using VRF instances along with MBGP to forwarding them across … Continue reading MPLS – Layer 3 overview, mBGP Configuration, and VRF Configuration reviewed (and how it all works together!)
Will be doing a very simple IGP setup using OSPFv2, MPLS, and doing some verification commands to demonstrate different ways to verify MPLS Bindings / LDP in action / Labels through the LSP (Label Switched Path). However first upon booting up my lab I saw my Layer 3 VPN tunnel throw a console message, so … Continue reading MPLS – Layer 3 VPN configuration review on PE Routers, configuration of Provider Routers, and verification commands!
As I will not be doing a DEEP Dive or review of VRF-Lite outside of reviewing my own post on its configuration, I figured I would put the highlights of my VRF-Lite post here in terms of configuration. This way we can both get an overview of VRF-Lite, and how it compares to EVN, … Continue reading VPN: VRF-Lite review of behaviors, EVN Fundamentals, configuration explained, no labbing due to constraints even on 15.x IOS!
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)
First I would like to draw the line in the sand between VRF, and VRF-Lite. VRF was created mainly for MPLS VPNs using BGP, so it is beyond the scope of the CCNP R/S, however Lite version uses the same theory and commands (mostly) VRF-Lite is for smaller scale deployment, but uses the same theory … Continue reading VRF (Virtual Routing and Forwarding) and VRF-Lite theory and initial lab setup (Your CCNA Router on a Stick refresher!)