Stitching multicast trees

摘要

Techniques for stitching multicast trees in a multiple data center environment. According to one embodiment, a technique for stitching multicast trees is provided, which includes determining, at an edge device of a data center, one or more Virtual Local Area Networks (VLANs) assigned to the edge device as a result of a designated forwarder election. An assigned forwarder message is sent by the edge device to one or more devices on the data center, the assigned forwarder message advertising the edge device as a designated forwarder for the VLANs assigned to the edge device. For each of the VLANs assigned to the edge device, the assigned forwarder message causes the edge device to be included in a multicast tree for the VLAN when the assigned forwarder message is received by specific ones of the devices in the data center that are associated with the VLAN.

主权项

1. A method, comprising
determining, at an edge device of a data center, two or more Virtual Local Area Networks (VLANs) assigned to the edge device as a result of a designated forwarder election; and sending an assigned forwarder message to one or more devices in the data center, the assigned forwarder message advertising the edge device as a designated forwarder for the VLANs assigned to the edge device, and for each of the VLANs assigned to the edge device, when received by specific ones of the devices in the data center that are associated with the VLAN, the assigned forwarder message causing the edge device to be included in a multicast tree for the VLAN.