Apparatus and method for low cost, multi-port protocol analysis and monitoring
View Patent ↗A multiport concentrator concentrates network data from different links in a network and carried on a plurality of lower speed lines into a stream of data carried on a higher speed line. A measurement system determines network statistics from the stream of data carried by the higher speed line.
1. An apparatus, comprising:
a multiport concentrator concentrating network data from different links in a network and carried on a plurality of lower speed lines into a stream of data carried on a higher speed line, the multiport concentrator comprising:
a plurality of line interfaces which connect the different links in the network to the multiport concentrator, each line interface including a power meter that collects telemetry data from the network data;
a field programmable gate array (FPGA) synchronizing the network data; combining the synchronized data; deframing the combined data; gathering additional telemetry data from the combined data; tagging the deframed data, the telemetry data collected by the power meters, and the additional telemetry data collected by the FPGA; and framing the tagged data, the tagged telemetry data collected by the power meters, and the tagged additional telemetry data collected by the FPGA in a SONET/SDH frame structure;
a serializer serializing the framed data; and
an electrical to optical module converting the serialized data into an optical signal, the optical signal being the stream of data carried on the higher speed line; and
a measurement system determining network statistics from the stream of data carried by the higher speed line.
2. The apparatus as in claim 1 , further comprising a remote link with the measurement system controlling an interface type of the multiport concentrator.
3. The apparatus as in claim 1 , wherein the multiport concentrator includes software for concentrating the network data, said software being upgradeable through a remote link.
4. The apparatus as in claim 1 , wherein the measurement system comprises at least one of a line interface module or a distributed network analyzer.
5. The apparatus as in claim 1 , wherein the measurement system comprises a line interface module, comprising:
an optical to electrical module converting the stream of data carried on the higher speed line to an electrical signal;
a deserializer deserializing the stream of data;
a stream extractor extracting a plurality of streams of data, each extracted stream containing network data carried on one link in the network, and telemetry data; and
a statistics gatherer collecting the telemetry data inserted in the stream of data for analysis by a computer.
6. The apparatus as in claim 5 , wherein the line interface module further comprises: a multi-stream HEC delineator assembling the extracted streams of data into cells; and a reassembler reassembling the cells into packets for analysis by a single network analyzer.
7. The apparatus as in claim 6 , wherein the line interface module further comprises an inverse multiplexer inverse multiplexing the assembled cells over ATM before reassembling the cells into the packets.
8. The apparatus as in claim 5 , wherein the line interface module further comprises a multi-stream HDLC and TRAU framer grouping the extracted streams of data into packets for analysis by a single network analyzer.
9. The apparatus as in claim 1 , wherein the multiport concentrator is located remotely, the concentrated stream of data is carried by the network, and the measurement system is located locally.