Detecting and avoiding routing loops with BGP route server extensions

摘要

In an embodiment, a method comprises: receiving, at a data packet router, a path advertisement comprising information about an available path; determining whether the path advertisement comprises an originator identifier of an originator of the available path; in response to determining that the path advertisement comprises the originator identifier of the originator of the available path, determining whether the originator identifier of the available path is a router identifier of the data packet router, and in response to determining that the originator identifier of the available path is the router identifier of the data packet router, not accepting the path advertisement; wherein the method is performed by one or more processors of the data packet router.

主权项

1. A method comprising:
receiving, at a data packet router that is configured as a route reflector, a path advertisement comprising information about an available path; determining whether the path advertisement comprises a border gateway protocol aggregator attribute value; in response to determining that the path advertisement comprises the border gateway protocol aggregator attribute value, determining whether the border gateway protocol aggregator attribute value in the path advertisement comprises an originator identifier of an originator of the available path; in response to determining that the path advertisement comprises the originator identifier of the originator of the available path, determining whether the originator identifier of the available path is a router identifier of the route reflector, and in response to determining that the originator identifier of the available path is the router identifier of the route reflector, not accepting the path advertisement; wherein the router identifier of the data packet router comprises an autonomous system (AS) number for an AS containing the data packet router and an Internet Protocol (IP) prefix of the data packet router; wherein the method is performed by one or more processors of the data packet router.