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  • BGP Graceful Restart, some inter-platform oddities, what to do with it

    calendar Oct 12, 2019 · 6 min read · eBGP NSX-V Datacenter Networking iBGP Routing & Switching Studies BGP NSX-T  ·
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    Since most of NSX-T runs in a firewall mode of sorts, it's probably worthwhile to discuss on of the less well-known routing protocol features - Graceful Restart. As published for BGP, IETF RFC 4724 outlines a mechanism for "preserving forwarding traffic during a BGP restart." This definition may be a little …


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  • NSX-T 2.5 Getting Started, Part 2 - Service Configuration!

    calendar Oct 5, 2019 · 3 min read · eBGP VMWare Home Lab Datacenter Networking iBGP Routing & Switching Studies BGP NSX-T  ·
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    Now that the primary infrastructure components for NSX-T are in place, it is now possible to build-out the actual functions that NSX-T is designed to provide. A friendly suggestion, make sure your Fabric is healthy before doing this: NSX-T differs from NSX-V quite a bit here. Irregular topologies between edge routers …


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  • NSX-T 2.5 Getting Started, Part 1

    calendar Sep 29, 2019 · 3 min read · eBGP VMWare Home Lab Network Security Datacenter Networking Spine and Leaf iBGP Routing & Switching Studies BGP NSX-T  ·
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    Since NSX-T 2.5 just came out, it's about time to do a full rebuild and getting started guide. NSX-T differs greatly from NSX-V in that the initial setup is quite a bit more complicated and doesn't have many guardrails or direct paths to initial set-up. We'll be skipping the appliance deployment, because if you have …


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  • Spine and Leaf Networks, an Outline

    calendar Sep 21, 2019 · 1 min read · Datacenter Networking Routing & Switching Studies  ·
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    With the previous post, I covered traditional data center networking, and some of the reliability compromises made to accommodate typical workloads. Here I'll be outlining my take as a series of blog posts on the next iteration of data center network design, Spine and Leaf: Lab Diagram What came before Introduction: …


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  • Spine and Leaf Practical Applications, The IP Portability Problem

    calendar Jun 29, 2019 · 6 min read · Anycast OSPF Datacenter Networking Routing & Switching Studies BGP  ·
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    So far, this is all great, but it IS missing something Networks are useless unless you do something with it. In most cases, a device (in this case, we'll use a server) needs to connect via redundant links to a common Layer 2 segment. Why is this? Well, most servers are incapable of dynamic routing. Instead, the server …


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  • Spine and Leaf Practical Applications, EGP and IGP combined!

    calendar Jun 22, 2019 · 6 min read · eBGP IS-IS OSPF Datacenter Networking iBGP Routing & Switching Studies BGP  ·
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    So far, all examples to date have been extremely simple, and stand rather well on their own (OSPF Clos would work just FINE in a campus network if you have cheap L3) but may not effectively address some more advanced use cases. In short, we're about to enter niche territory. Generally speaking, BGP is regarded as the …


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  • Spine and Leaf Practical Applications, eBGP

    calendar Jun 8, 2019 · 8 min read · eBGP Datacenter Networking Routing & Switching Studies BGP  ·
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    Overview First off, here's the reference diagram (YAML): Assumptions about difficulty Most people I've met outside of the carrier space are pretty intimidated by BGP, as it is truly impressive in scope. Here, we're going to break-out BGP usage into two categories: iBGP: This is where all nodes have the same Autonomous …


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  • Spine and Leaf Practical Applications, OSPF

    calendar Jun 2, 2019 · 6 min read · IPv6 OSPF Datacenter Networking Routing & Switching Studies  ·
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    As covered in the previous post, base configuration of a spine-and-leaf fabric is actually pretty simple. This will be pretty short, but we'll cover the conversion of the previously built fabric to OSPF. Here's the updated diagram: (YAML). As we move to a more full-fledged implementation, we'll do dual-stack. The …


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  • Spine and Leaf Practical Applications, RIPv2

    calendar Jun 1, 2019 · 4 min read · Datacenter Networking Routing & Switching Studies RIPv2  ·
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    This is only slightly trolling, but is primarily to outline the topological simplicity of Spine-and-Leaf networking, in a way that is suspiciously similar to Cisco classes. First things first, here's the diagram. This is performed using a set of four Cat3560s, enterprise licensed and wired in a redundant square …


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  • Spine and Leaf Networks, a Topology

    calendar May 27, 2019 · 1 min read · eBGP IS-IS OSPF Datacenter Networking Layer 1 iBGP Routing & Switching Studies RIPv2 BGP  ·
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    Before we get too far - this is going to be a simple topology, relatively speaking. I'll be putting the switch configs on my GitHub account as well when I get to that point. The diagram is as follows: This was drawn programmatically with drawthe.net. File is here


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ENGYAK.co

A blog about IT

Disclaimer

The opinions expressed on this site are my own personal opinions and do not represent my employer’s view in any way.

Recent Posts

  • Automate Cisco IOS/IOS-XE documentation with Ansible (with examples)
  • Document Networks as Code with D2!
  • Document vSphere as Code with D2!
  • Diagram as Code with D2!
  • Enable ToFU (Trust on First Use) with OpenSSH
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  • Why Automate? VM Deployment with vSphere's REST API
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