MPLS VPN Components4. Multi-protocol extensions to BGP-4
Multi-Protocol extensions to BGP-4 (RFC2283) are used to distribute the VPN-IPv4 routing information together with new BGP extended community attributes:
- Route-Target
- 64 bits identifying routers that should receive the route
- Carried as a BGP extended community attribute
- Site of Origin identifier (SOO)
- 64 bits identifying the routers that originate the route
- Carried as a BGP extended community attribute