Architecture you can click
Every lab is a live topology — toggle protocol layers, click any device or link for its role and config, walk the control plane step by step, and break things to watch reconvergence. Deep-linkable, config-downloadable, built for learning the why behind the design.
VXLAN EVPN Multi-Site
Two fabrics — Nebraska and North Dakota — joined by Border Gateway spines over 10G DCI, built the Nexus Dashboard 4.2 / NX-OS 10.6 way. Toggle protocol layers, click every device and link, walk unicast learning, BUM flooding, and symmetric IRB routing step by step — then break BGWs, DCI links, and vPC peer-links to watch it converge.
- 3 walkthroughs · 3 failure scenarios
- EVPN route-type badges + per-hop packet headers
- NX-OS CLI state that fills in per step
Dual-ISP Edge — BGP, LACP & vPC
The classic enterprise edge: two routers with eBGP to separate ISPs and iBGP between them, a layer-2-only Nexus 93180 vPC pair carrying two transit VLANs, and a Palo Alto Active/Passive HA pair peering iBGP with both routers. Follow the default route’s journey, watch LACP negotiate a bundle across two switches, then kill an ISP, a firewall, and a whole Nexus.
- 3 walkthroughs · 3 failure scenarios
- IOS-XE, NX-OS, and PAN-OS config on every element
- Why weight — not admin distance — picks the default
