Patent ID: 9525560
Filing Date: 2016-12-20
CPC Classification: H04L

Claim Text:
1. A method for transmitting a multicast packet across Layer 2 virtual networks on a Transparent Interconnection of Lots of Links (TRILL) network, comprising: receiving, by a gateway, a link state packet (LSP) sent by each routing bridge (RB), wherein each LSP comprises a network identifier of a Layer 2 virtual network and a multicast address; separately performing, by the gateway, calculation on the network identifier and the multicast address that are in each LSP, to obtain a calculation result corresponding to each combination of the network identifier and the multicast address; separately performing, by the gateway, data conversion on the network identifier and the multicast address that are in each LSP, and performing computation in combination with a total number of gateways that are on the TRILL network, to obtain the calculation result corresponding to each combination of the network identifier and the multicast address; sending a notification message to each RB that is on the TRILL network when the gateway determines that information preconfigured on the gateway matches a calculation result corresponding to a combination of the network identifier and the multicast address, wherein the notification message comprises the network identifier and the multicast address that are in the matched combination; receiving, by the gateway from at least one RB, a multicast packet corresponding to the multicast address in the matched combination; and forwarding the multicast packet.