Tag: networking

All the articles with the tag "networking".

• Why does EVPN/VXLAN exist? The problems that broke the old way

  19 Jul, 2026

  EVPN/VXLAN didn't appear because engineers wanted more acronyms. It appeared because the old network model broke under the demands of modern data centers.

• Go meets Cisco using SSH

  5 Jul, 2022

  Using Go to connect to Cisco devices over SSH — reading show commands programmatically and parsing network device output.

• Cisco NX-OS: VXLAN and External Connectivity

  4 Dec, 2019

  How to connect VXLAN fabrics to the outside world — external routing, VRF leaking, and border leaf design.

• Cisco NX-OS: VXLAN - vPC - Anycast

  2 Dec, 2019

  The problem with VXLAN and vPC — and how anycast VTEP solves it by presenting a single logical VTEP address.

• Cisco NX-OS: VXLAN Symmetric Routing

  25 Nov, 2019

  EVPN IRB symmetric routing: how it solves the ARP/CAM scaling problems of asymmetric routing using L3 VNIs.

• Cisco NX-OS: VXLAN Asymmetric Routing

  20 Nov, 2019

  EVPN IRB asymmetric routing: how it works, its limitations with ARP cache and CAM table scaling, and when to avoid it.

• Cisco NX-OS: VXLAN BGP EVPN control plane

  18 Nov, 2019

  BGP EVPN as a control plane for VXLAN: route types, MP-BGP, and how it replaces flood-and-learn.

• Cisco NX-OS: VXLAN Multicast Control Plane

  13 Nov, 2019

  Configuring VXLAN with multicast flood-and-learn control plane on Cisco NX-OS. Step-by-step with commands.

• Cisco NS-OS: Virtual eXtensible LAN (VXLAN) Overview

  11 Nov, 2019

  VXLAN is a tunneling protocol that encapsulates Layer 2 Ethernet frames in Layer 3 UDP packets. An overview of how it works and why it exists.

• Cisco NX-OS: FabricPath (FP)

  30 Oct, 2019

  FabricPath is Cisco's L2 routing technology — MAC-in-MAC routing that removes STP from the topology. How it works and when to use it.