BIRD in Calico Architecture

BIRD in Calico Architecture An architecture diagram generated by Archify. BIRD (node-1) · advertises node-1 pod CIDR · Kubernetes cluster (3 nodes) BIRD (node-1) advertises node-1 pod CIDR BIRD (node-2) · advertises node-2 pod CIDR · Kubernetes cluster (3 nodes) BIRD (node-2) advertises node-2 pod CIDR BIRD (node-3) · advertises node-3 pod CIDR · Kubernetes cluster (3 nodes) BIRD (node-3) advertises node-3 pod CIDR ToR Switch · top-of-rack BGP peer · External network ToR Switch top-of-rack BGP peer Core Router · data center core · External network Core Router data center core iBGP eBGP pod routes Kubernetes cluster (3 nodes) External network Legend Backend External

BGP session types

  • • Node-to-node mesh: default for small clusters, automatic full mesh
  • • Route reflector: large clusters (100+ nodes) use dedicated RR nodes
  • • External peering: manual BGPPeer config for on-premises integration