Kubernetes Network Architecture
OpenShift Network Topology
Node Network
Infrastructure Layer
10.0.1.0/24
Physical Router
10.0.1.1
Gateway
Node 1
10.0.1.10
Hosts: Pod A, Pod B
Node 2
10.0.1.11
Available
Node 3
10.0.1.12
Hosts: Pod C, Pod D
Pod Network
Overlay Layer
10.128.0.0/14
Node 1
Pod A
10.128.1.5
Backend Pod
Node 1
Pod B
10.128.1.6
Backend Pod
Node 3
Pod C
10.128.2.10
Frontend Pod
Node 3
Pod D
10.128.2.11
Frontend Pod
Service Network
Virtual Layer
172.30.0.0/16
backend-svc
172.30.45.100
Service VIP • Load Balances → Pod A, B
frontend-svc
172.30.45.101
Service VIP • Load Balances → Pod C, D
Ingress/Route Layer
External Access
Public
OpenShift Route
https://ui.apps.ocp.example.com
External Access → frontend-svc
Physical Connection
Virtual/Overlay Connection