Feature Description

For every IP chunk that SMF allocates to a UPF, the UPF publishes a route record to upstream routers for advertising the IP address subnets toward the data network. However, some of the routers have limitation with the number route records that it can allow.

It limits the number of IP chunks that SMF can allocate to a UPF and is forced to use bigger chunks (32K / 16K). But, using bigger IP chunks causes under-utilization of the allocated IP chunks, therefore, those chunks cannot be used by native instances.

SMF allows defining smaller chunk sizes and hence, limiting the number of route records that are published using some route record optimizations.