Method and apparatus for path selection

A non-transitory computer-readable storage medium storing instructions that, when executed by a computer, cause the computer to perform a method for configuring path selection in a network, wherein the network comprises a first router, a second router, a third router, a fourth router, and an intermediary device, wherein the intermediary device is interposed between the first router and the second router, wherein the third router and the fourth router are coupled to the second router, and wherein the method comprising:

• configuring the second router to use Differentiated Services Code Point (DSCP) while routing packets so that packets with a first DSCP value are routed through the third router, and packets with a second DSCP value are routed through the fourth router;
• and
• configuring the intermediary device to:
• transparently intercept a packet forwarded by the first router to the second router,
• determine whether the packet is to be routed through the third router or the fourth router,
• modify a DSCP field in the packet based on said determining, and
• forward the packet to the second router.

An apparatus, comprising:

• a processor;
• and
• a non-transitory storage medium storing instructions that, when executed by the processor, cause the apparatus to perform a method for configuring path selection in a network, wherein the network comprises a first router, a second router, a third router, a fourth router, and an intermediary device, wherein the intermediary device is interposed between the first router and the second router, wherein the third router and the fourth router are coupled to the second router, and wherein the method comprising:
• configuring the second router to use Differentiated Services Code Point (DSCP) while routing packets so that packets with a first DSCP value are routed through the third router, and packets with a second DSCP value are routed through the fourth router;
• and
• configuring the intermediary device to:
• transparently intercept a packet forwarded by the first router to the second router,
• determine whether the packet is to be routed through the third router or the fourth router,
• modify a DSCP field in the packet based on said determining, and
• forward the packet to the second router.