Constrained route distribution for multiple virtual private network services

摘要

In general, techniques are described for ensuring the distribution of Virtual Private Network (VPN) routes in a service provider network configured with multiple VPN services. In some examples, a network device receives configuration data that defines a VPN service associated with a route target. The network device, responsive to receiving the configuration data, sends a request for routes that match a type of the VPN service to a routing protocol speaker. The network device receives routes that match the type of the VPN service and are associated with the route target, installs the routes that match the type of the VPN service and are associated with the route target to the routing information base. The network device forwards traffic for the VPN service in accordance with the installed routes.

主权项

1. A method comprising:
receiving, by a network device, configuration data that defines a first virtual private network (VPN) service and associates the first VPN service with a route target, wherein the route target identifies the network device as a member of a route target extended community; responsive to receiving the configuration data, by the network device, determining the route target is associated with a second VPN service previously defined for the network device; and responsive to the determining, by the network device, sending a route refresh message to a routing protocol speaker that stores a first set of routes that match a type of the first VPN service and a second set of routes that match a type of the second VPN service.