METHOD AND APPARATUS FOR PATH SELECTION

摘要

Systems and techniques are described for path selection. A packet can be transparently intercepted at an intermediary device. Next, the intermediary device may modify one or more bits in the header of the packet. The intermediary device can then forward the packet to the next hop device. In some network configurations, the modifications to the one or more bits in the header of the packet may cause a downstream device to select a path that is different from the path that would have been selected by the downstream device if the one or more bits in the header of the packet had not been modified. A path selection policy can be used to determine whether or not one or more bits in the header of the packet are to be modified.

主权项

1. A method for path selection, the method comprising:
transparently intercepting a packet at an intermediary device that is located between a source device and a first destination device, wherein a header of the packet includes a link layer source address associated with the source device and a first link layer destination address associated with the first destination device; and in response to determining that the packet is to be forwarded to a second destination device instead of the first destination device,
replacing the first link layer destination address with a second link layer destination address associated with the second destination device, andforwarding the packet to the second destination device.