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Link-Layer Hints for Detecting Network Attachments

Link-Layer Hints for Detecting Network Attachments. <draft-yegin-dna-l2-hints-01> Alper Yegin, Eric Njedjou, Siva Veerepalli, Nicolas Montavont, Thomas Noel. Objective. draft-yegin-dna-l2-hints-01.txt Identify how link-layer can assist DNA algorithms

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Link-Layer Hints for Detecting Network Attachments

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  1. Link-Layer Hints for Detecting Network Attachments <draft-yegin-dna-l2-hints-01> Alper Yegin, Eric Njedjou, Siva Veerepalli, Nicolas Montavont, Thomas Noel

  2. Objective • draft-yegin-dna-l2-hints-01.txt • Identify how link-layer can assist DNA algorithms • Catalogue existing link-layers and their capabilities • GPRS • cdma2000 • IEEE 802.11 • …

  3. Triggers • Event notifications from the link-layer will trigger the DNA algorithm: • Link up: • PDP context activation on GPRS • PPP establishment on cdma2000 • (re)association on IEEE 802.11f or secure association on IEEE 802.11i • Link down: • PDP context deactivation on GPRS • PPP tear-down on cdma2000 • Deauthentication/disassociation on IEEE 802.11f, disassociation on IEEE 802.11i

  4. Hints • Hints may be optionally provided along the triggers, which may help optimize the DNA process • The IP address is provided during PDP context activation on GPRS • Same with the PPP on cdma2000 • IEEE 802.11… not straight forward

  5. Backup slides

  6. ACTIVATE PDP CONTEXT REQUEST ACTIVATE PDP CONTEXT ACCEPT (allocated IP address, QoS parameters) IP connectivity GPRS SGSN GGSN MN MN Mobile Node SGSN GPRS Access Point GGSN GPRS Access Router

  7. cdma2000 MS: Mobile Station BS: Base Station PCF: Packet Control Function PDSN: Packet Data Serving Node

  8. IEEE 802.11 New Access Router New Access Point Mobile Probe Request Active scanning Probe Response Beacon Passive scanning Authentication Authentication Assoc. Request Assoc. Response Router Solicitation Router Advertisement

  9. Hints in IEEE 802.11 • No L3 configuration in L2 • Need for an identifier to associate links with networks (configurations) • BSSID (L2 address of AP)? • No one-to-one mapping to a network • SSID (service set identifier)? • Same SSID might be used across a routed network. • SSID does not mean much when the network is selected during the authentication phase (dynamic VLAN assignment) • Any useful hints for DNA without modifying IEEE 802.11?

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