MPLS Over L3VPN Ron Bonica

Reference Model and Requirement 1 C0 CE1 CE2 C3 PE1 P1 Customer VPN Site A Customer VPN Site B Service Provider L3VPN Customer LSP

The Problem 1 C0 CE1 CE2 C3 PE1 P1 Customer VPN Site A Customer VPN Site B Service Provider L3VPN Customer LSP

Carrier’s Carrier Nearly Solves The Problem 1 C0 CE1 CE2 C3 PE1 P1 Customer VPN Site A Customer VPN Site B Service Provider L3VPN VPN LSP SP-LSP

You Want This 1 C0 CE1 CE2 C3 PE1 P1 Customer VPN Site A Customer VPN Site B Service Provider L3VPN VPN LSP SP-LSP Customer LSP

Challenges RSVP signal C0-CE1-CE2-C3 Make CE1 believe that the next-hop to C3 is CE2 –Not PE1 –Three proposed solutions (BGP Next Hop Attribute, iBGP, policy manipulation) Partial ERO calculation –C0 to CE2 –CE2 toC3 TE Considerations

TE Considerations: A New BGPAttribute CE2 tells SP network TE attributes associated with path between itself and C3 PE2 tells CE1 TE attributes associated with path between itself and C3 –Path through SP network –Path from CE2 to C3 CE1 injects TE information into IGP

Questions?