Architecture for virtualization and distribution of routing information used in a transport network

摘要

A method, apparatus and computer program product for distribution of routing information used in a transport network is presented. In a transport network having a plurality of edge devices and core devices, a main instance of a protocol is used for shortest path and tree computation. A multicast tree is defined per Virtual Services Network (VSN) to distribute Link State Data Base (LSDB) updates that only apply to members of said VSN. Multicast trees are built using a secondary instance of the control protocol LSDB and wherein each VSN multicast tree represents a separate instance of the secondary instance of the control protocol LSD. LSDB updates are distributed that only apply to members of the VSN using the multicast tree for the VSN.

主权项

1. A computer-implemented method in which a computer system performs operations comprising:
in a transport network having a plurality of edge devices and core devices, using a main instance of a protocol for shortest path and tree computation; defining a multicast tree per Virtual Services Network (VSN) to distribute updates to a primary instance of a control protocol Link State Data Base (LSDB) that only apply to members of said VSN, wherein said VSN virtualizes network devices and services and is used to connect users to distinct application services; building said multicast tree using a secondary instance of said control protocol LSDB and wherein each VSN multicast tree represents a separate instance of said secondary instance of said control protocol LSDB and wherein each said VSN multicast tree built using said secondary instance of said control protocol LSDB does not carry internal topology updates; and distributing LSDB updates that only apply to members of said VSN using said multicast tree for said VSN.