MULTICAST ROUTING SYSTEM AND METHOD

摘要

There is described a method of managing routing paths, in particular multicast routing paths, in a content delivery network. The method includes determining, according to a unicast routing protocol, a first link cost for a first routing path and determining a second link cost for a second routing path, the second routing path comprising a first component comprising a link cost to a router that is part of a multicast group and a second component comprising a link cost for the multicast tree from the router. An adjustment factor is then determined based on information received from the content delivery network. The adjustment factor is applied to the second link cost. The adjusted second link cost and the first link cost are analysed to determine an adjusted least cost path in the content delivery network and the adjusted second link cost is selectively output to a routing database to influence routing in the content delivery network.

主权项

1. A method of managing routing paths in a content delivery network, the method comprising:
determining, according to a unicast routing protocol, a first link cost for a first routing path; determining a second link cost for a second routing path, the second routing path comprising a first component comprising a link cost to a router that is part of a multicast group and a second component comprising a link cost for the multicast tree from the router; determining an adjustment factor based on information received from the content delivery network; applying the adjustment factor to the second link cost; analysing the adjusted second link cost and the first link cost to determine an adjusted least cost path in the content delivery network; and selectively outputting the adjusted second link cost to a routing database to influence routing in the content delivery network.