Tracing host-originated logical network packets

摘要

Some embodiments provide a method for a first host machine that hosts a virtual machine connected to a particular logical network. The method receives a command to test connectivity between the first host machine and a set of at least one additional host machine that also host virtual machines on the particular logical network. At the first host machine, the method generates a packet for sending to the set of additional host machines in order to test the connectivity. The method appends to the generated packet (i) information that identifies the particular logical network and (ii) a flag indicating that the packet is for connectivity testing. The method encapsulates the generated packet with tunnel endpoint addresses, including a tunnel endpoint located at the first host machine. The method sends the encapsulated packet from the first host machine to the set of additional host machines according to the tunnel encapsulation.

主权项

1. For a first host machine that hosts a virtual machine connected to a particular logical network, a method comprising:
receiving a command to test connectivity between the first host machine and a set of at least one additional host machine that also hosts virtual machines on the particular logical network; at the first host machine, generating a packet for sending to the set of additional host machines in order to test the connectivity; appending to the generated packet (i) information that identifies the particular logical network and (ii) a flag indicating that the packet is for connectivity testing; encapsulating the generated packet with tunnel endpoint addresses, including a tunnel endpoint located at the first host machine; and sending the encapsulated packet from the first host machine to the set of additional host machines according to the tunnel encapsulation, wherein when connectivity is up between the first host machine and a particular host machine in the set of additional host machines, an initial encapsulated packet sent to the particular host machine in response to the command reaches a tunnel endpoint of the particular host machine irrespective of a number of intervening network elements.