1.2 Routing Concepts

1.2.f Route filtering with any routing protocol

I’m finally back to labbing after almost two years off. I’d like to say I have a good excuse, but I won’t bother. What’s important is that I’ve picked it up again. So let’s jump into it. Filtering EIGRP Routes with Prefix-Lists For this bit, we’ll filter routes coming in using prefix-lists. How hard canContinue reading “1.2.f Route filtering with any routing protocol”

1.2.j Bidirectional Forwarding Detection

BFD is a critical, CRITICAL, component of SDA and SD-WAN. So it’s worth taking a deep look at it here. References:CiscoIETF The process flow is:1. The routing protocol, OSPF for instance, discovers a neighbor.2. The routing protocol tells the BFD process to start a BFD peering relationship with that same neighbor.3. If a failure occurs,Continue reading “1.2.j Bidirectional Forwarding Detection”

This whole chunk of the blueprint doesn’t really make sense because it’s mostly topics that will be covered under individual routing protocols. The only subsections I’m going to cover under 1.2 are 1.2b. VRF-Lite (covered in a separate post), Policy Based Routing (PBR, which I’ll cover below), and Bidirectional Forwarding Detection (BFD, which I’ll coverContinue reading “1.2 Routing Concepts”

1.2.b VRF-lite

This is a pretty important topic when we get to the DNAC section, so we may as well get it out of the way. For background trivia, the “lite” part means that we’re VRFs without MPLS label imposition or without MP-BGP extensions. And it’s fewer calories. References:MPLS and VPN Architectures, Volume II (Cisco Press) Note:Continue reading “1.2.b VRF-lite”