142results about How to "Reduce forwarding delay" patented technology

The invention discloses a network address translation (NAT) implementing system which comprises a controller and an openflow switch, wherein the controller issues a flow table and an improved group table, the openflow switch receives the flow table and the improved group table, a data package which needs to conduct address translation is matched according to a matching rule of the address translation recorded by the flow table, translation between a private address and a public internet protocol (IP) address is conducted according to a rule of address translation recorded by the improved group table, and the data package is transmitted out through an address which is translated. The invention further discloses an NAT implementing method and the openflow switch. According to the NAT implementing system, only the flow table and the improved group table are transmitted to the openflow switch once, frequent intersection between the openflow switch and the controller is not required, time delay of transmission of the data package is shortened, and transmission efficiency of a network is improved.

The invention discloses a user-driven centralized access control method for an SDN (Software Defined Network), which belongs to the technical field of computer applications. The method is characterized by comprising the following steps of providing a friendly and centralized management interface for a user by utilizing an REST API (Representational State Transfer Application Programming Interface); simplifying a global network view to an abstract network view; carrying out matching detection on a newly added access control list rule requested by a user; implementing access control based on the abstract network view in an active manner according to the user request; and dynamically responding to a network view updating event to update a flow table timely. According to the method, the centralized interface is provided for the user to simplify the network management; the access control is implemented in an active manner, so that the data packet forwarding delay is reduced; through carrying out the matching detection, a space of the flow table is saved; and furthermore, through dynamically responding to the network view updating event, the correctness of a high-level decision is guaranteed.

The invention provides a network fast forwarding module and a network fast forwarding achieving method. The achieving method includes the steps of initializing the network fast forwarding module, registering in each linux network subsystem, enabling the network fast forwarding module to obtain and cache network forwarding rules which are issued by a linux network protocol stack, generating a fast forwarding rule cache table when various types of network data flow is initiatively forwarded by the linux network protocol stack, matching the network data flow with the fast forwarding rule cache table after the network data flow is received from network cards again, and directly sending out the network data flow from the corresponding network card if corresponding fast forwarding rules exist, otherwise, sending the network data flow back to the linux network protocol stack to be processed. According to the network fast forwarding module and the network fast forwarding achieving method, bridging and routing forwarding are supported, the network forwarding procedure is simplified, CPU resource consumption is reduced, forwarding delayed time is shortened, and the network forwarding handling capacity is greatly improved.

A method for setting up PIM-DM route table item includes learning to down stream new PIM-DM router by up stream PIM-DM router , setting up pseudo multicast stream by up stream PIM-DM router and sending it to down stream new PIM-DM neighbour router , setting up multicast route table item by down stream new PIM-DM neighbour router according to received pseudo multicast stream , judging whether said table item is included in device multicast list or not and setting up new multicast route table item in said list as well as adding relevant retransmitting interface to refresh hardware retransmitting table item if it is not included.

The invention discloses a one-cycle router on chip based on a quick path technology. The one-cycle router on chip consists of P input ports, a quick arbitration module, a transmission arbitration module, a path arbitration module, an anticipating signal management module, a crossbar switch and P output ports, wherein the input port consists of a path allocation module, a buffer storage module, a quick path module, a virtual path module, a transmission request transmission unit and a path request transmission unit; the quick arbitration module consists of a first response control part and P quick arbitration parts; the path arbitration module consists of a path request distribution part, P path arbitration parts and a second response control unit; the transmission arbitration module consists of a transmission request distribution part, P transmission arbitration parts and a third response control part; and the anticipating signal management module consists of P computing storage parts and P signal driving parts. The one-cycle router on chip can realize one-cycle forwarding operations, and is applied to various routing algorithms.

The invention provides a low latency Ethernet repeater and a low latency Ethernet forwarding method based on a T structure, which are used for solving the wiring redundancy problem in the existing switch and the problems that the time delay is larger and the time delay is uncertain in the existing forwarding method. The repeater comprises a port in T-type distribution and a processing unit; the processing unit comprises a left port frame processing module, a right port frame processing module, a user port frame processing module, an address learning and search module, a special protocol processing module and a user port adapter module. A forwarding method comprises the following steps: judging a link state; caching a data frame; identifying and classifying frames; reconstructing a link; classifying PAUSE frames; configuring the repeater; learning and searching an address; building an output queue; building the PAUSE frames; and outputting the PAUSE frames to the port. The low latency Ethernet repeater and the low latency Ethernet forwarding method based on the T structure provided by the invention can fully reduce the user access wiring redundancy, reduce the forwarding delay and guarantee the forwarding delay certainty, and can detect and reconstruct a network link timely during a network link failure, so that the low latency Ethernet repeater and the low latency Ethernet forwarding method can be used for building a high speed real-time access network.

The invention discloses a message forwarding method based on a wireless mesh network. The method comprises the following steps: receiving a first message sent by a physical layer of a wireless mesh node; determining whether the first message is a to-be-forwarded message; if so, searching a next hop address corresponding to a destination IP address in a pre-obtained routing table; re-packaging the first message according to the next hop address to obtain a second message; and sending the second message to the physical layer, so that the physical layer modulates the second message and sends the same to the next hop node through radio frequency. By application of the technical scheme provided by the embodiment of the invention, the message is directly forwarded on a data link layer, so that the forwarding delay can be shortened, the FPGA where the data link layer is located runs in parallel to ensure relatively strong search ability, and thus the CPU load is reduced by the routing search of the FPGA. The invention further discloses a message forwarding device based on the wireless mesh network, and the message forwarding device has corresponding technical effects.

The invention discloses a message transmission method, a service chain system and a computer-readable storage medium. The method comprises the following steps: when a service function proxy node receives a network flow message sent by a classifier, if the received network flow message is not the first message of the network flow, obtaining the identification information recorded corresponding to the network flow; if the service function proxy node receives the network flow message sent by the classifier, obtaining the identification information recorded corresponding to the network flow; if the service function proxy node receives the network flow message, obtaining the identification information. If the identification information is the first identification, the optimized transmission path in the service chain path information sent by the service chain controller is obtained, and the network flow message is transmitted in the service chain according to the optimized transmission path.The optimized transmission path is that when the network flow message needs to be transmitted to the next hop of the service chain, the service function proxy node sends the network flow message to the next hop service function node. The invention reduces the forwarding times between the service function node and the service function proxy node which do not support NSH on the service chain, shortens the transmission path of the message in the service chain, reduces the forwarding time delay, and improves the service quality.

The invention provides a method and a device for content processing and network equipment. The method includes receiving a message; inquiring mapping relations between data flow information and audit filtering strategy, and judging whether the message is sequence message or not if the audit filtering strategy matching with the data flow information of the message exists; and if yes, performing auditing and filtering processing to the content of the message. By the method and the device for the content processing and the network equipment, the problems that plenty of internal memory is taken up for caching messages in the prior art, processing speed of the network equipment is reduced due to the fact that delay of caching further increases forwarding delay of the messages, and users' experience degrees are deteriorated are solved.