Adjacency server for virtual private networks

A method comprising:

• sending an adjacency initialization packet from an edge device to an adjacency server, the edge device being connected to the adjacency server by a non-any source multicast (non-ASM) core network and the adjacency initialization packet including an Internet Protocol (IP) address for the edge device;
• receiving a response adjacency initialization packet from the adjacency server indicating a virtual private network (VPN) adjacency having been established between the edge device and the adjacency server over the non-ASM core network;
• receiving, from the adjacency server at the edge device, a unicast replication list that includes Internet Protocol addresses for edge devices each having a VPN adjacency with the adjacency server;
• storing the unicast replication list in memory of the edge device;
• and
• establishing, based on the unicast replication list, VPN adjacencies with each of other edge devices identified in the unicast replication list over the non-ASM core network.

An apparatus comprising:

• one or more network interfaces;
• and
• a processor coupled to the one or more network interfaces, wherein the processor is configured to:
• receive a first adjacency initialization packet from a first edge device, the first edge device being connected to the apparatus by a non-any source multicast (non-ASM) core network and the first adjacency initialization packet including a first Internet Protocol (IP) address for the first edge device;
• send a first response adjacency initialization packet back to the first edge device to establish a virtual private network (VPN) adjacency between the apparatus and the first edge device;
• add the first IP address to a unicast replication list that stores IP addresses for edge devices each having a VPN adjacency with the apparatus;
• receive a second adjacency initialization packet from a second edge device, the second edge device being connected to the apparatus by the non-ASM core network and the second adjacency initialization packet including a second IP address for the second edge device;
• send a second response adjacency initialization packet back to the second edge device to establish a VPN adjacency between the apparatus and the second edge device;
• add the second IP address to the unicast replication list;
• and
• advertise the unicast replication list to each of the edge devices that has an IP address in the unicast replication list for the edge devices to establish VPN adjacencies with one another over the non-ASM core network.

An apparatus comprising:

• one or more network interfaces;
• a memory;
• and
• a processor coupled to the one or more network interfaces and the memory, wherein the processor is configured to:
• send an adjacency initialization packet from the apparatus to an adjacency server, the apparatus being an edge device connected to the adjacency server by a non-any source multicast (non-ASM) core network and the adjacency initialization packet including an Internet Protocol (IP) address for the apparatus;
• receive a response adjacency initialization packet from the adjacency server indicating a virtual private network (VPN) adjacency having been established between the edge device and the adjacency server over the non-ASM core network,
• receive, from the adjacency server, a unicast replication list that includes Internet Protocol addresses for edge devices each having a VPN adjacency with the adjacency server,
• store the unicast replication list in the memory, and
• establish, based on the unicast replication list, VPN adjacencies with each of other edge devices identified in the unicast replication list over the non-ASM core network.

One or more non-transitory computer readable storage media encoded with software comprising computer executable instructions and when the software is executed operable to:

• receive, at an adjacency server, a first adjacency initialization packet from a first edge device, the first edge device being connected to the adjacency server by a non-any source multicast (non-ASM) core network and the first adjacency initialization packet including a first Internet Protocol (IP) address for the first edge device;
• send a first response adjacency initialization packet back to the first edge device to establish a virtual private network (VPN) adjacency between the adjacency server and the first edge device;
• add the first IP address to a unicast replication list that stores IP addresses for edge devices each having a VPN adjacency with the adjacency server;
• receive, at the adjacency server, a second adjacency initialization packet from a second edge device, the second edge device being connected to the adjacency server by the non-ASM core network and the second adjacency initialization packet including a second IP address for the second edge device;
• send a second response adjacency initialization packet back to the second edge device to establish a VPN adjacency between the adjacency server and the second edge device;
• add the second IP address to the unicast replication list;
• and
• advertise, from the adjacency server, the unicast replication list to each of the edge devices that has an IP address in the unicast replication list for the edge devices to establish VPN adjacencies with one another over the non-ASM core network.

One or more non-transitory computer readable storage media encoded with software comprising computer executable instructions and when the software is executed operable to:

• send an adjacency initialization packet from an edge device to an adjacency server, the edge device being connected to the adjacency server by a non-any source multicast (non-ASM) core network and the adjacency initialization packet including an Internet Protocol (IP) address for the edge device;
• receive a response adjacency initialization packet from the adjacency server indicating a virtual private network (VPN) adjacency having been established between the edge device and the adjacency server over the non-ASM core network;
• receive, at the edge device, a unicast replication list that includes Internet Protocol addresses for edge devices each having a VPN adjacency with the adjacency server;
• store the unicast replication list in memory;
• and
• establish, based on the unicast replication list, VPN adjacencies with each of other edge devices identified in the unicast replication list over the non-ASM core network.