subnet-allocation option Subnet Allocation Option draft-johnson-dhc-subnet-alloc-00.txt November 18, 2002 Richard Johnson Kim Kinnear Mark Stapp

subnet-allocation option Problem to be solved Other services need to hand out individual IP addresses Proxying every address assignment isn’t always effective Subnet allocation via small aggregation boxes. (SOHO)

subnet-allocation option A Solution Lease blocks of IP addresses Collect usage information Support deprecation of delegated subnets

subnet-allocation option Alternatives Allocation via Radius (AAA) –Requires implementing another protocol just for this Allocation via UIAP (from zerouter bof) –Not designed for larger networks –No support for passing back usage information

subnet-allocation option Specifics of subnet allocation Gracefully extends existing DHCP leasing paradigm Gives DHCPv4 a capability similar to prefix allocation in DHCPv6 Defines one new option with sub-options