摘要:
A method to transmit a TCP Segment through an access node or any other router of a telecommunication system while allowing processing transport layer L4 information. The access node receives a first packet carrying a TCP segment header and a first portion of the TCP segment, and at least one second packet carrying another portion of this TCP segment. In other words, for reason of limited packet length, one TCP segment may be spread over multiple IP packets not all containing the TCP segment header. The problem of processing L4 information is solved because the access node terminates the TCP flows and the TCP segments are reassembled therein prior to be sent out.
摘要:
A network element (101; 201; 611) of a data packet network (100) comprises a traffic mirroring filter (112) configured to filter data packets and to forward data packets that match the traffic mirroring filter (112) to an analysing network element (103; 621). The network element (101; 201; 611) further comprises a data packet tagging module (113) to tag a data packet that matches the traffic mirroring filter (112) with a mirroring tag and to forward that data packet without duplication to thereby postpone duplication of that data packet to a packet forwarding network element (615) located at a point in the network where a trajectory of that data packet to its destination (102; 603) and a trajectory of that data packet to the analysing network element (103; 621) diverge.
摘要:
The present invention relates to a network unit (1) adapted to process and transmit data units (21 to 26) belonging to distinct traffic flows (FlowA; FlowB; FlowC), and comprising: - a dispatching unit (14) adapted to dispatch the data units for further parallel processing, - traffic processing units (11 to 13) adapted to process the data units in parallel, - an aggregation unit (15) adapted to aggregate the processed data units for further transmission. A network unit according to the invention further comprises: - an arbitration unit adapted, for a particular processed data unit (24) that is ready in a particular processing unit (11) for further aggregation and transmission, to identify a particular traffic flow (FlowC) to which the particular data unit belongs, to check whether a further data unit (23; 25) handled by a further traffic processing unit (12; 13) belongs to the particular traffic flow and precedes the particular data unit within that flow, and if none, to allow (go) delivery of the particular data unit for further aggregation and transmission. A particular traffic flow can be identified by means of a particular source and/or destination address, and/or a particular payload type, and/or a particular traffic priority. The present invention also relates to a method for processing and transmitting data units.
摘要:
A method to preserve the ordering of data packets of a same flow (P1-P4, P7, P8) passing either through a control plane (CP) or through a data plane (DP) of a telecommunication network element. The method comprises the step of, when the control plane starts processing the new flow, the control plane controls the data plane to latch any other packet belonging to this flow by sending a first control packet (C1) to said data plane. When the processing is completed, the control plane controls the data plane to release the latched packets by sending a second control packet (C3) to said data plane. The present method is particularly applicable to Ethernet frames, where it is also not allowed to reorder frames belonging to a same 'Ethernet flow'.