Devices, systems and methods for debugging network connectivity

摘要

The devices, systems, and methods test network connectivity, where the physical network is used to provide one or more service chains connecting service appliances, including firewalls, intrusion detection systems, load balancers, network address translators, web servers, and so on. A service chain may involve multiple routing paths. The devices, systems, and methods test network connectivity test network connectivity by injecting customized echo request packets on each routing path and collecting customized echo reply packets in response. The customized echo reply packets are processed and aggregated to isolate network connectivity problems.

主权项

1. A method for service chain connectivity comprising:
mapping, by a controller, a service chain of service appliances to one or more routing paths configured on a physical network, wherein each routing path comprises one or more access routers having an ingress port; at the ingress port of each access router of the one or more routing paths, injecting customized echo test packets, each customized echo test packet comprising a test request payload; receiving, at the controller, customized echo reply timestamp packets, each customized echo reply packet comprising a reply payload, the reply payload comprising a service chain identifier and router configuration data, wherein the service chain identifier uniquely identifies the service chain using at least a physical interface identifier and a virtual network identifier; and aggregating, by the controller, the customized echo reply packets to test connectivity of the service chain using the service chain identifier and the router configuration data from each of the customized echo reply packets.