System, devices and methods for facilitating coexistence of VLAN labeling and fine-grained labeling RBridges

摘要

An example method for calculating a constrained distribution tree in a TRILL network including a plurality of VL and FGL RBridges can include learning an FGL multi-destination frame filtering capability of at least one of the FGL RBridges in the TRILL network, constructing a sub-graph including the FGL RBridges and associated links and calculating at least one sub-tree based on the sub-graph. The method can also include constructing a graph including VL RBridges, the FGL RBridges and associated links by adding links between the VL RBridges and the FGL RBridges. The FGL RBridge to which the VL RBridge is linked can have sufficient FGL multi-destination frame filtering capability. Further, the method can include calculating a constrained distribution tree based on the graph by treating the sub-tree as a logical node.

主权项

1. A method for calculating a constrained distribution tree in a Transparent Interconnect of Lots of Links (“TRILL”) network comprising a plurality of virtual local area network labeling (“VL”) RBridges and a plurality of fine-grained labeling (“FGL”) RBridges, the method comprising:
supporting a tenant having a higher-order FGL identifier equivalent to an addressable virtual local area network (“VLAN”) within the TRILL network; learning a respective FGL multi-destination frame filtering capability for each of the FGL RBridges in the TRILL network; constructing a sub-graph comprising the FGL RBridges and associated links; calculating at least one sub-tree based on the sub-graph; constructing a graph comprising one or more of the VL RBridges, and the FGL RBridges and associated links by adding one or more links between the VL RBridges and the FGL RBridges; and calculating a constrained distribution tree based on the graph by treating the sub-tree as a logical node, wherein a level of FGL multi-destination frame filtering capability for each FGL RBridge to which a VL RBridge is linked provides sufficient FGL multi-destination frame filtering to prevent security concerns.