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Dynamic Allocation of Shared IPv4 Addresses draft-ietf-dhc-dynamic-shared-v4allocation-01

IETF 90. Dynamic Allocation of Shared IPv4 Addresses draft-ietf-dhc-dynamic-shared-v4allocation-01. Q. Sun , Y. Cui, I. Farrer , Y. Lee, Q. Sun, M. Boucadair IETF 90, Toronto. IETF 90. Overview. Dynamic management of shared IPv4 address leases

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Dynamic Allocation of Shared IPv4 Addresses draft-ietf-dhc-dynamic-shared-v4allocation-01

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  1. IETF 90 Dynamic Allocation of Shared IPv4 Addressesdraft-ietf-dhc-dynamic-shared-v4allocation-01 Q. Sun, Y. Cui, I. Farrer, Y. Lee, Q. Sun, M. Boucadair IETF 90, Toronto

  2. IETF 90 Overview • Dynamic management of shared IPv4 address leases • Through the combination of IPv4 address and OPTION_V4_PORTPARAMS • Relevant for use with DHCPv4 over DHCPv6 • Enables more efficient use of scarce IPv4 addresses • Changes since adopted • NOT an update to RFC2131 • Improvement of client/server behaviors • Compatibility with normal client/server

  3. IETF 90 Further specifics on Behaviors • Client: • MUST renew and release with theoption • When receiving multiple replies, selects the one it prefers • Server: • MUST implement a mechanism for address sharing through address and port-leasing • Specify the logic to select an address with PSID for allocation, similar to that of address selection in RFC2131 • Remove the statement that PSID is related to client state determination • Reserves WKPs from allocation to clients

  4. IETF 90 Client/Sever Logic for the option

  5. IETF 90 Next step • Request WG’s review • WGLC?

  6. IETF 90 Server-Client Interactions • Include OPTION_PORTPARAMSV4, Client-ID in related DHCPv4 messages • Transported within DHCPv4-query/DHCPv4-response messages over an IPv6 network

  7. IETF 90 DHCPv4 Port Parameters Option • OPTION_PORTPARAMSV4 format • Similar format to OPTION_S46_PORTPARAMS in draft-ietf-softwire-map-dhcp-06

  8. IETF 90 Logic for Interworking with non-shared DHCPv4oDHCPv6 Servers? • A client’s DISCOVER doesn’t contain OPTION_V4_PORTPARAMS, and times out. Either: • Available full IPv4 addresses have run out, or • All servers ONLY support address sharing • Client then requests an IPv4 address withOPTION_V4_PORTPARAMS in PRL Is this behavior necessary?

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