01 — MULTISITE FABRIC
EVPN VXLAN Multisite
Two pods joined over a DCI interconnect, with border gateways carrying EVPN routes between sites while VXLAN keeps every tenant segment isolated end to end.
EVPNMultipodMultisiteBGWVXLAN
Topologies & Labs
Each lab below was planned, configured and verified in EVE-NG, GNS3 or PNETLab. Open any entry for the design goals, key configuration and what the build proved.
02 — WAN CORE
MPLS Traffic Engineering
A provider-style core running MPLS L3VPN services with explicit TE tunnels steering traffic, multihomed customer edges and SOO communities blocking loops.
BGP SOOMPLS L3VPNMPLS TEMultihome
03 — DATA CENTRE FABRIC
BGP EVPN VXLAN
A spine-leaf fabric on NX-OS with MP-BGP as the EVPN control plane, VXLAN doorways between tenants and an OSPF underlay holding the transport together.
EVPNMP-BGPNXOSOSPFVXLAN
Lab Environment
How the labs are built
Every topology starts as a diagram, then becomes a running lab: images for Cisco IOS and NX-OS are staged in EVE-NG, links are cabled to match the design, and each control-plane feature is enabled step by step with reachability checks between stages.
Convergence is measured, failure cases are pulled (link loss, peer loss, gateway loss), and only topologies that reconverge cleanly are written up here.
EVE-NGGNS3PNETLabCisco IOSNX-OSWireshark
