Feature Description
Virtual Routing and Forwarding (VRF) is a technology that allows multiple instances of a routing table to coexist within the same router at the same time. As the routing instances are independent, the same or overlapping IP addresses can be used without conflicting with each other.
In private APN (PAPN) deployments, the same SMF can support multiple PAPNs, requiring authentication and accounting with the enterprise AAA servers. As the AAA servers belong to different mobile virtual network operators (MVNOs), it is possible that their address ranges overlap. The SMF uses VRF to allow the overlapping AAA server addresses in PAPN or Mobile Virtual Network Operator (MVNO).
Important | Overlapping addresses for the AAA client is currently not supported. |
SMF uses VRF to also remove the Dynamic and Static routes based on UDP interfaces that are optimized by using the default route of VRF. This action replaces the policies with one default route per interface to improve the operational performance.
SMF enables configuration of VRF in the IP pool. The SMF sends IP address details along with the configured VRF name to UPF. UPF maps the IP address to VRF configured within UPF.
SMF supports up to 129 VRFs with a scale of 2K TPS for private APNs and DNNs.