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Tracking Static / AutoConfigured IPv6 Addresses

Tracking Static / AutoConfigured IPv6 Addresses. draft-asati-dhc-ipv6-autoconfig-address-tracking IETF 86. Rajiv Asati Dan Wing. Agenda. Motivation Solution Next step. Motivation. Need a way to convey SLAAC (or Static) assigned IPv6 addresses to the backend for various Use-Cases:

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Tracking Static / AutoConfigured IPv6 Addresses

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  1. Tracking Static/AutoConfiguredIPv6 Addresses draft-asati-dhc-ipv6-autoconfig-address-tracking IETF 86 Rajiv Asati Dan Wing

  2. Agenda Motivation Solution Next step

  3. Motivation • Need a way to convey SLAAC (or Static) assigned IPv6 addresses to the backend for various Use-Cases: • IP address Logging • IP address Tracking • Compliance • Avoid host changes/dependency (note BYOD)

  4. Solution DHCP Server Client_Binding Message First Hop Router Host Devices • First Hop Router conveys the “Neighbor Cache” entries to the backend using DHCPv6 • New DHCPv6 messages and new DHCP option defined • Add an IP:MAC binding entry

  5. Solution • Host Behavior • No changes required. • Router Behavior • Uses the DHCP message to send one or more IP:MAC bindings (from Neighbor cache) to the DHCP server • Server Behavior • Receives/Stores the IP:MAC bindings

  6. Solution – DHCP Message & Option Message +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | RECORD-CLIENTBINDING-ACK| transaction-id | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | : Client-Binding-Ack-options : | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Option +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | OPTION_CLIENT_BINDING | option-len | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | : Client Identifier (variable) : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Lifetime (4 octets) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | : IPv6 Addresses (n x 16 octets) : | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

  7. Next Steps • Request additional WG review & feedback • Already had some discussion on the mailing list • Already had good interest off-list • Welcome Contribution/Participation • Solicit usefulness/WG Adoption

  8. Solution – Why DHCP? If DHCP is used for address assignment, then DHCP server already records the IP:MAC binding per host DHCP server has been the de facto placeholder for storing the IP-MAC binding information

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