Abstract:
The present invention relates to a method and nodes for handling multicast messages over an access domain. The method starts with the receipt of a multicast message from a service provider domain. The method pursues with the identification of a service agent corresponding to the service provider domain from which the multicast message is received. Then, the content of a Virtual Local Area Network (VLAN) Tag field of the multicast message is modified so as to correspond to the identified service agent. The modified multicast message is forwarded on the access domain. Upon receipt of the modified multicast message at an access node, the access node identifies at least one service binding related to the service agent identified in the VLAN Tag field of the received multicast message. For each related service binding, the access node adapts the VLAN Tag field of the multicast message so as to correspond to a local VLAN information, and forwards the adapted multicast message on a user port corresponding to the service binding. The invention also includes an access edge node and an access node adapted to perform the method of the present invention.
Abstract:
The present invention relates to a method and nodes for handling broadcast messages over an access domain. For doing so, an access node and an access edge node are adapted to allow tunnelling of broadcast messages within Unicast messages transmitted over the access domain. The access node receives broadcast messages from user domains, intercepts the broadcast messages and forwards the received broadcast messages to the access edge node in Unicast messages. The access edge node receives and identifies the tunnelled broadcast messages. Then, the identified tunnelled broadcast messages are detunneled by the broadcast handler at the access edge node and handled by the broadcast handler.
Abstract:
A method, a router and a switching element card for providing a rate limiting mechanism in the router. Upon reception of a packet stream from a forwarding element card of the router at a first rate, it is determined that the packet stream is to be forwarded to a further card of the router. If the further card has a treatment rate lower than the first rate, the packet stream is passed to a rate limiting mechanism before being forwarded to the further card. Optionally, if the further card does not have a treatment rate lower than the first rate the packet stream is forwarded to the further card without being passed to the rate limiting mechanism.
Abstract:
A system and method for virtualizing a flow switch to be used by application providers in a cloud computing environment is provided. An application provider's packet handling rules are received by a cloud management system. The rules are translated from the application provider's overlay topology to the underlay data center topology. The underlay network elements involved in the received rules can be identified. A translated rule can be decomposed into a plurality of rule portions which are transmitted to the appropriate underlay network elements.
Abstract:
The present invention relates to network nodes and methods that use an encoding scheme for encoding a point-to-multipoint traffic path from one ingress node to a plurality of egress nodes in, for example, a Multi-Protocol Label Switching network. According to the encoding scheme a so-called common ERO is used. The common ERO specifies a list consisting of nodes that are common to several sub paths in order to provide a compression mechanism that reduces the size of path messages that are used for signaling the point-to-multipoint traffic path.
Abstract:
A method and nodes for aggregating data traffic over an access domain between service providers and user domains. An access edge node is introduced in the access domain between service providers and user domains. The access edge node hosts service agents, each service agent controlling a Virtual Local Area Network (VLAN) over the access domain for one of the service providers. The access edge node verifies whether a service agent, corresponding to the service provider identified in a received service request, exists. If so, the user domain is added to the VLAN corresponding to the requested service provider by creating a service binding at the access edge node. An access node providing access to the access domain to the user domain is informed of the service binding. Data traffic between the user domain and the identified service provider is aggregated over the access domain according to the created service binding.
Abstract:
The present invention relates to a method and nodes for handling multicast messages over an access domain. The method starts with the receipt of a multicast message from a service provider domain. The method pursues with the identification of a service agent corresponding to the service provider domain from which the multicast message is received. Then, the content of a Virtual Local Area Network (VLAN) Tag field of the multicast message is modified so as to correspond to the identified service agent. The modified multicast message is forwarded on the access domain. Upon receipt of the modified multicast message at an access node, the access node identifies at least one service binding related to the service agent identified in the VLAN Tag field of the received multicast message. For each related service binding, the access node adapts the VLAN Tag field of the multicast message so as to correspond to a local VLAN information, and forwards the adapted multicast message on a user port corresponding to the service binding. The invention also includes an access edge node and an access node adapted to perform the method of the present invention.
Abstract:
A method for establishing a downstream multicast and a upstream and downstream unicast connections between a root and at least one leaf, the root and the at least one leaf being in a tree-type configuration, comprises: creating a downstream unicast label; and distributing the created downstream unicast label in a same signaling message as downstream multicast and upstream unicast labels from the root to the at least one leaf. A network node comprising such a downstream unicast label is used to carry out the method.
Abstract:
The present invention relates to a method, an access node, an access edge node and a decentralized node for aggregating data traffic over an access domain. The decentralized node corresponds to one of the service providers, and is located in closer proximity with user domains to be serviced. The decentralized node maintains over the access domain one or several Virtual Local Area Networks, for aggregating thereon data traffic to be exchanged with the user domains, on behalf of the service provider domain. To allow proper aggregation of the data traffic, service bindings are created and stored at the access edge node, and further stored at the decentralized node and at the access node. Therefore, aggregation of the data traffic between the decentralized node and the user domains over the access domain is performed in accordance with the created service bindings.
Abstract:
A router architecture with one or more network interfaces, processing, switching and forwarding elements, each which has one or more processing units capable of processing network traffic to provide at least a portion of a network service. The switching element is capable of acting as a proxy to the processing elements while each of the forwarding elements are capable of receiving network traffic on the network interface and are capable to delegate processing of network traffic toward processing elements through at least one switching element.