DHCPv4 Extension for Port-set Allocation Qiong Sun, Yiu Lee, Peng Wu.

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Presentation transcript:

DHCPv4 Extension for Port-set Allocation Qiong Sun, Yiu Lee, Peng Wu

Our request for DHCP extension We have proposed “lightweight 4over6” in softwire WG. – draft-cui-softwire-b4-translated-ds-lite – draft-zhou-softwire-b4-nat The feedback from the WG – It is a good and reasonable approach – We will merge two I-Ds into a single one So, we need a extended DHCPv4 option for restricted IPv4 address allocation.

What is Lightweight 4over6 ? Lightweight 4over6 is an IPv4-over-IPv6 hub and spoke mechanism, which supports address sharing to deal with IPv4 address exhaustion, and places the IPv4 NAT on the initiator side. A simple extension for DS-Lite without NAT, and address sharing mode for public 4over6.

Overview Lw 4over6 initiator Lw 4over6 Concentrator Acquire public IPv4 address + Port set NAT44 within restricted port set Tunnel encapsulation/de- capsulation. Subscriber-level binding record Tunnel encapsulation/de- capsulation. No NAT anymore Tunneling Non-continuous port set algorithms (e.g. GMA in the design team) can be introduced to further improve the security. [v6 address, v4 address, PSID] public v4 address, port set

Restricted IPv4 address allocation Initiator would need to get restricted IPv4 address, including – Public IPv4 address: draft-cui-dhc-dhcpv4-over-ipv6: WG item the same with public 4over6. – Non-overlap port-set We do not have it yet …

Considerations on Port-Set Extension DHCP or PCP – Since DHCP is more mature and has widely supported, we would prefer to have a extended DHCP option. DHCPv4 or DHCPv6 – As we need to allocate public IPv4 address to initiator, it would be more reasonable to extend DHCPv4. Port-set algorithm – Adopt the port-set algorithm in softwire MAP design team.

We would like to propose… A DHCPv4 extension for port-set allocation It is used for lightweight 4over6 and can be deployed when necessary Coexistent with draft-cui-dhc-dhcpv4-over-ipv6 We would like to ask DHC WG: – How do you think of this DHCPv4 extension?