Pre-Allocation of IP Chunks Based on Maximum Session Size
Use the following configuration to define the small chunk-group size for IPv6 address range:
config
ipam
instance instance_id
address-pool pool_name
ipv4
chunk-group chunks-per-group { 2 | 4| 8 }
reserve-contiguous-groups
exit
NOTES:
-
reserve-contiguous-groups —If reserve-contiguous-groups is enabled and max-upf-sessions is configured, then IPAM will reserve the chunk-group and chunks in the power of 2 to cover the value of max-upf-sessions .
For example, if the max-upf-sessions is 60000 and reserve-contiguous-groups is enabled with DP-size 8192 and chunks-per-group is 4, then IPAM reserves two chunk-groups in this case with 65536 (2 to the power of 16) IPs and single-route is published for this toward the UPF.