1. OSPF Geo Location IETF 97, Seoul
Acee Lindem, Cisco
Naiming Shen, Cisco
Enke Chen, Cisco

2. Draft History First presented at IETF 95 in Buenos Aires
Common encoding agreed upon across IS-IS, OSPF, BGP, and LISP
Privacy Discussions

3. Geo Location Use Cases P2P, P2MP, and Hybrid automatic link cost
Find-My-Router Apps
Proximity services in content sharing and SFC
Network topology maps
Dynamic DNS loadsharing
Traffic matrix of location pairs
Same ‘subnet’ over WAN and ECMP
Future routing/service/mgmt apps
Static provisioning, utilize additional information or GPS capable device

4. OSPF Advertisement
OSPF Router-Information Opaque LSA used for both link and wider advertisement
No longer sent in OSPF Hello Link Local Signaling (LLS)
Link-Scoped OSPF RI LSA used for metric computation use case.
Area-Scoped/AS-Scoped OSPF RI LSA used for other applications (e.g., OAM applications)

5. Geo Location TLV Unified Encoding (1/2)

6. Geo Location TLV Unified Encoding (2/2)
Previous Encoding Fields
Flags: U, N, E, A, M
Location Uncertainty in centimeters
Latitude and Longitude in milliseconds
Altitude is a signed integer specified in centimeters or meters
New Fields
Radius and R, K flags

7. Privacy Discussion
Current encoding has uncertainty in centimeters – Up to 650 meters of uncertainty.
RFC 7459 strongly suggested by Alia as definitive source for geo-privacy.
Discussion started with Alissa Cooper and Martin Thomson.
May modify encoding based on Martin’s review

8. Next Steps
Complete Privacy Discussion
Request WG Adoption