Abstract: A method and system are disclosed, for using Intermediate System to Intermediate System, IS-IS, as control plane for Shortest Path Bridging, SPB, in a network comprising at least a Service Provider Network, SPN (101), and at least two Backbone Edge Bridges, BEBs (121i), connected to the SPN (101). The method comprises, and the BEBs are configured to: forming adjacency between BEBs through LAN Hellos, electing one of the BEBs as a Designated IS, DIS, and an emulated pseudonode, all BEBs creating and flooding non-pseudonode level-1 LSPs, the DIS creating and flooding a Pseudonode level-1 ESP, and periodically sending Complete Sequence Number PDUs, CSNPs, to the other BEBs, and running Shortest Path First, SPF, to calculate the shortest path in the network between BEBs.

Abstract: A method and system are disclosed, for using Intermediate System to Intermediate System, IS-IS, as control plane for Shortest Path Bridging, SPB, in a network comprising at least a Service Provider Network, SPN (101), and at least two Backbone Edge Bridges, BEBs (121i), connected to the SPN (101). The method comprises, and the BEBs are configured to: forming adjacency between BEBs through LAN Hellos, electing one of the BEBs as a Designated IS, DIS, and an emulated pseudonode, all BEBs creating and flooding non-pseudonode level-1 LSPs, the DIS creating and flooding a Pseudonode level-1 ESP, and periodically sending Complete Sequence Number PDUs, CSNPs, to the other BEBs, and running Shortest Path First, SPF, to calculate the shortest path in the network between BEBs.

Abstract: An edge network node and a method of configuring a service are disclosed. A virtualized routing and forwarding (VRF) instance is defined for a customer at the edge network node. The edge network node also defines a service identifier. The edge network node associates the VRF instance with the service identifier and with a routing table entry. The routing table entry comprises a set of destination IP addresses and a backbone IP address, which may be an address of a peer edge network node. When the edge network node receives a packet from the customer, it encapsulates the packet in a tunnel and forwards it on a backbone network toward the peer edge network node. The edge network node may associate a plurality of routing table entries with a service, may define a plurality of services for the customer and may define services for a plurality of customers.

Abstract: The present subject matter discloses a method for UDP relay in communication networks. In one implementation, a UDP port number included in a header of a message is identified. The method further includes ascertaining the IP address based on a mapping table, where the mapping table includes a list of plurality of UDP port numbers mapping to the IP addresses of corresponding destination servers. Further, the message is modified to obtain a modified message based at least on the IP address. Subsequently, the modified message is unicasted to the destination IP address.