Posts

All the articles I've posted.

• 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.

• Cisco NX-OS: vPC & Failures

  28 Oct, 2019

  How vPC handles failures: orphan ports, peer link loss, keepalive loss, and dual-active scenarios.

• Cisco NX-OS: vPC & FHRP

  23 Oct, 2019

  FHRP acts as active/active forwarding over vPC. How HSRP and VRRP integrate with vPC on Nexus switches.

• Cisco NX-OS: From vPC to Back-to-Back vPC

  21 Oct, 2019

  The vPC Peer Link should never be blocking. Notes on moving from standard vPC to back-to-back vPC topologies.

• Cisco NX-OS: vPC Configuration

  16 Oct, 2019

  Step-by-step vPC configuration on Cisco NX-OS: peer keepalive, peer link, vPC domain, and member ports.

• Cisco NX-OS: Virtual Port Channel (vPC)

  14 Oct, 2019

  Multi-Chassis EtherChannel types and vPC fundamentals. The building blocks of vPC on Cisco Nexus switches.

• Cisco NX-OS: Fabric Extender (FEX)

  7 Oct, 2019

  Nexus 2000 Fabric Extenders act as remote line cards. Notes on FEX architecture, connectivity modes, and design considerations.

• Cisco NX-OS: Virtual Device Contexts (VDCs)

  2 Oct, 2019

  Nexus Virtual Device Contexts let you virtualize physical hardware — similar to contexts in ASA. How VDCs work on Cisco Nexus.

• Cisco NX-OS: CLI notes

  29 Sep, 2019

  Practical NX-OS CLI notes: aliases, show commands, and tips for working efficiently on Cisco Nexus switches.