1. BGP-based Auto-discovery mechanism for l1vpns draft-ouldbrahim-l1vpn-bgp-autodiscovery-00.txt Hamid Ould-Brahim Don Fedyk Yakov Rekhter IETF 64, 11/05, Vancouver, Canada

2. Mechanism Document the BGP discovery mechanism for l1vpns (historically coming from GVPN draft). The auto-discovery mechanism for l1vpns allows the provider network devices to dynamically discover the set of PEs having ports attached to CEs member of the same l1vpns. –Focus on PE-PE discovery. In general it follows draft-l3vpn-bgpvpn-auto-06.txt base specification: –RTs for constraining route distribution –Exception: No RD field. That information is necessary for completing the signaling phase (in a single sided provisioning model). First version focuses on basic mode auto-discovery mode.

3. Populated through BGP PE1 PE2 PE5 PE4 PE3 PE5 CE1 CE3 CE4 CE5 CE61 10.1.1.1 10.1.1.3 10.1.1.4 10.1.1.5 10.1.1.6 A PIT is created for each L1VPN connected to the PE PIT on PE 1 for VPNA CPI PPI Additional Information 10.1.1.1 16.1.1.1 OC-48 SONET 10.1.1.3 16.1.1.3 OC-48 SONET 10.1.1.4 16.1.1.4 OC-48 SONET The PIT is populated from: 1.Local customer/provider port information (CPI/PPI) 2.Through using a VPN auto-discovery mechanism (e.g., BGP-MP) PIT: Port Information Table CPI: Customer Port identifier PPI:Provider Port Identifier VPN Auto-Discovery (BGP-MP) { } 16.1.1.1 16.1.1.6 16.1.1.3 16.1.1.5 16.1.1.4

4. Encoding - NLRI +----------------------------------------+ | Length (1 octet) | +---------------------------------------+ | PPI AFI (2 octets) (*) | +---------------------------------------+ | PPI Length (1 octet) (*) | +---------------------------------------+ | PPI (variable) | +---------------------------------------+ | CPI AFI (2 octets) | +---------------------------------------+ | CPI Length (1 octet) | +---------------------------------------+ | CPI (variable) | +---------------------------------------+ No new AFI, but a new SAFI.

5. Next Step Enhanced mode will be covered in future revised versions of the draft. Questions?