= Internal
Reference diagrams for OpenShift internal traffic.

== Pod to Pod

.OpenShift SDN - Pod to Pod Same Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to Pod Same Machine.png[]

.OpenShift SDN - Pod to Pod Different Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to Pod Different Machine.png[]

== Pod to Service

.OpenShift SDN - Pod to Service Same Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to Service Same Machine.png[]

.OpenShift SDN - Pod to Service Different Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to Service Different Machine.png[]

== Pod to Route

[NOTE]
====
These communication flows are not strictly internal to OpenShift as they exit the OpenShift cluster to come back in via the Route.
====

.OpenShift SDN - Pod to Service via Route via Ingress Router using Pod hostPort - Router, Source Pod, and Destination Pod Different Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to Service via Route via Ingress Router using Pod hostPort - Router, Source Pod, and Dest Pod Different Machine.png[]

.OpenShift SDN - Pod to Service via Route via Ingress Router using Pod hostPort - Router Different Machine, Source Pod and Destination Pod Same Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to Service via Route via Ingress Router using Pod hostPort - Router Different Machine, Source Pod and Dest Pod Same Machine.png[]

.OpenShift SDN - Pod to Service via Route via Ingress Router using Pod hostPort - Router and Source Pod Same Machine, Destination Pod Different Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to Service via Route via Ingress Router using Pod hostPort - Router and Source Pod Same Machine, Dest Pod Different Machine.png[]

.OpenShift SDN - Pod to Service via Route via Ingress Router using Pod hostPort - Router Different Machine, Source Pod and Destination Pod Same Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to Service via Route via Ingress Router using Pod hostPort - Router Different Machine, Source Pod and Dest Pod Same Machine.png[]

= Egress
Reference diagrams for OpenShift Egress traffic.

.OpenShift SDN - OpenShift_4_SDN-Pod to External Endpoint
image::OCP-4x-base/OpenShift_4_SDN-Pod to External Endpoint.png[]

.OpenShift SDN - Pod to External Endpoint via EgressIP on Additional Subnet Interface on Same Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to External Endpoint via EgressIP on Additional Subnet Interface on Same Machine.png[]

.OpenShift SDN - Pod to External Endpoint via EgressIP on Additional Subnet Interface on Different Machine
image::OCP-4x-base/OpenShift_4_SDN-Pod to External Endpoint via EgressIP on Additional Subnet Interface on Different Machine.png[]

= Ingress
Reference diagrams for OpenShift Ingress traffic.

== Ingress Router using Pod hostPort
Reference diagrams for OpenShift Ingress traffic using a Pod hostPort. Default for UPI installations.

.OpenShift SDN - External Consumer Initiated to Service via Route via Ingress Router using Pod hostPort - Router and Pod Same Machine
image::OCP-4x-base/OpenShift_4_SDN-Ext Consumer Initiated to Service via Route via Ingress Router using Pod hostPort - Same Machine.png[]

.OpenShift SDN - External Consumer Initiated to Service via Route via Ingress Router using Pod hostPort - Router and Pod Different Machine
image::OCP-4x-base/OpenShift_4_SDN-Ext Consumer Initiated to Service via Route via Ingress Router using Pod hostPort - Across Machines.png[]

.OpenShift SDN - External Consumer Initiated to Service via Route via Ingress Router using Pod hostPort via Non-Default Subnet Interface - Router and Pod Same Machine
image::OCP-4x-base/OpenShift_4_SDN-Ext Consumer Initiated to Service via Route via Ingress Router using Pod hostPort via Non-Default Subnet Interface - Same Machine.png[]

.OpenShift SDN - External Consumer Initiated to Service via Route via Ingress Router using Pod hostPort via Non-Default Subnet Interface - Router and Pod Different Machine
image::OCP-4x-base/OpenShift_4_SDN-Ext Consumer Initiated to Service via Route via Ingress Router using Pod hostPort via Non-Default Subnet Interface - Across Machines.png[]

== Ingress Router using Service nodePort
Reference diagrams for OpenShift Ingress traffic using a Pod https://docs.openshift.com/container-platform/latest/networking/configuring_ingress_cluster_traffic/configuring-ingress-cluster-traffic-nodeport.html[nodePort]. Default for IPI installations.

.OpenShift SDN - External Consumer Initiated to Service via Route via Ingress Router using Service nodePort - Router and Pod Same Machine
image::OCP-4x-base/OpenShift_4_SDN-Ext Consumer Initiated to Service via Route via Ingress Router using Service nodePort - Same Machine.png[]

.OpenShift SDN - External Consumer Initiated to Service via Route via Ingress Router using Service nodePort - Router and Pod Different Machine
image::OCP-4x-base/OpenShift_4_SDN-Ext Consumer Initiated to Service via Route via Ingress Router using Service nodePort - Across Machines.png[]