Stitching label switch paths between autonomous systems with internet protocol routing

A method of routing traffic through a network, the method comprising:

• receiving a communication packet at an autonomous system border router (ASBR) of an autonomous system (AS), the communication packet including a predetermined label value, wherein the predetermined label value replaced a prior label value associated with the destination network device;
• in response to the ASBR identifying the predetermined label value, performing a routing lookup using a routing table of the ASBR to identify a next hop for routing of the communication packet;
• and
• routing the communication packet to a network device corresponding to the next hop.

A system for routing traffic through a network, the system comprising:

• a network device of a first autonomous system (AS);
• and
• an ingress autonomous system border router (ASBR) of a second AS in communication with the network device;
• wherein the network device is configured to:
• receive a communication packet including a first label value;
• and
• replace the first label value with a predetermined label value, and
• wherein the ingress ASBR is configured to:
• in response to receiving the communication packet having the predetermined label value, perform an ingress ASBR routing lookup using a routing table of the ingress ASBR to identify an edge device of the network;
• and
• replace the predetermined label with a second label value associated with the edge device.