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.