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Network engineer writing about BGP, infrastructure, and datacenter ops.

Internet in VRF vs Internet in GRT

A comparison of running the Internet in a VRF versus the Global Routing Table (GRT). The comparison is split into two tables. The first covers core distinctions rooted in protocol behavior and network design — these are largely inherent to each approach, though new RFCs and mechanisms (for example, a mass-withdrawal mechanism for L3VPN) could shift some of them over time. The second covers current vendor implementation status — feature support that is vendor- and platform-dependent and may improve over time. ...

July 1, 2026 · 8 min · 1684 words