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 …

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 f or secure association on IEEE i
Link down:
PDP context deactivation on GPRS
PPP tear-down on cdma2000
Deauthentication/disassociation on IEEE f, disassociation on IEEE i

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 … not straight forward

5. Backup slides

6. GPRS SGSN GGSN MN IP connectivity ACTIVATE PDP CONTEXT REQUEST
ACTIVATE PDP CONTEXT ACCEPT
(allocated IP address, QoS parameters)
SGSN
GGSN MN
IP connectivity
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 ?