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, VRF uses the same or overlapping IP addresses without conflicting with each other.

Note

In 2023.02.0 and later releases, UPF supports up to 200 VRFs for private APN or DNN.

In releases prior to 2023.02.0, UPF supported up to 129 VRFs for private APN or DNN.

In UPF, this feature enables association of IP address pools with VRF. The chunks from this pool are allocated to the UPFs that are configured to use these pools. VRF-associated pools in UPF can be either Static or Private type.

When UPF comes up for registration, the chunks in the PRIVATE VRF pool are allocated similar to the normal private pools. For a Static VRF pool, SMF does chunk allocation to UPF during configuration. An Sx-Route-Update message is sent for pre-allocated static chunks during UPF registration.