摘要:
A packet processor which extracts a packet header field, word-aligns the extracted packet header field, and stores the aligned data in an external memory, for a main processor which processes packets received through a packet communication network. The packet processor includes: a serial-to-parallel converter for converting a packet in a bit stream, which is received via the packet communication network, into a word data, the word data being in a word unit(s) which includes at least one byte; a queue for temporarily storing the converted word data; and a computation part for selecting, among the word data stored in the queue, a word data that corresponds to the packet header, performing bit operations with the selected word data to extract a field therefrom, and expanding the extracted field into word alignment and providing it to the main processor. Computational requirements for the main processor to do bit operations for packet header processing are reduced, and therefore, packet processing efficiency can be improved.
摘要:
A managing device according to the present invention is a management device of a network controllable by a flow aggregate (FA), and it includes a parameter information receiver for receiving control information on the FA from an upper node, a parameter generator for receiving an FA parameter according to the control information, and a parameter transmitter for transmitting the FA parameter generated by the parameter generator to another node.
摘要:
A packet classification apparatus and method using field level tries includes a main processing part for generating and maintaining the field level tries, which organize a multi-field packet by field in a hierarchical structure for classifications; and classification engines, each of which is provided with a first classification part for performing queries and updates and processing a prefix lookup represented by an IP source/destination address lookup, and a second classification part for proceeding with classifications by corresponding field based on a result of the first classification part in order to process a range lookup belonging to the result. Accordingly, tries in the unit of a field are developed so that packet classifications for high-speed networking with excellent query performance are secured, and wherein approximately a half-million classifier rules can be processed.
摘要:
Disclosed is a packet switching apparatus in a data network including a plurality of ports for taking charge of an input/output of packet transmission/reception commands and data packets, a plurality of transmission/reception control sections for accessing information resources classified into groups in response to the packet transmission/reception commands, and storing the corresponding data packets in a packet memory or transmitting the corresponding data packets stored in the packet memory to the corresponding ports, a plurality of the information resources for storing in groups information required for packet switching, and providing the information stored therein to the transmission/reception control sections, and a plurality of information resource schedulers, connected to the respective information resources, for scheduling accesses of the transmission/reception control sections.
摘要:
A flow control method in an Ethernet switch being a downstream device using a full duplex mode in a packet switched network of the type having a plurality of input ports connected to a plurality of Ethernet switches being upstream devices and a common memory for storing packet data received from each input port and for transmitting packet data read from the common memory to a destination upstream device. In such flow control method, the buffer state of the common memory is first determined. If the buffer state is buffer-full, a pause frame including a predetermined pause time is transmitted to the plurality of Ethernet switches being upstream devices and an expected pause time of the upstream devices is counted. The buffer state of the common memory is determined again if the expected pause time expires. If the buffer state is buffer-full, the pause frame including the predetermined pause time is re-transmitted to the plurality of Ethernet switches being upstream devices and the expected pause time of the upstream devices is initiated.