Apparatus and method for low cost, multi-port protocol analysis and monitoring
View Patent ↗A concentrator multiplexes network data from different links in a network and carried on a plurality of lower speed lines into multiplexed network data carried on a higher speed line. A line interface module demultiplexes the multiplexed network data carried on the higher speed line, assembles the demultiplexed network data into cells, and reassembles cells into packets for analysis. A single distributed network analyzer analyzes the reassembled network data.
1. An apparatus, comprising:
a concentrator multiplexing network data from different links in a network and carried on a plurality of lower speed lines into multiplexed network data carried on a higher speed line; and
a distributed network analyzer determining network statistics from the multiplexed network data carried by the higher speed line, wherein the concentrator inserts telemetry data relating to the network data carried by each of the plurality of lower speed lines into overhead bytes of the higher speed line carrying multiplexed network data.
2. An apparatus as in claim 1 , further comprising a line interface module demultiplexing the multiplexed network data carried by the higher speed line, assembling the demultiplexed network data into cells, and reassembling the cells into packets for analysis by a single distributed network analyzer.
3. An apparatus as in claim 2 , further comprising a remote link with the concentrator controlling a mapping mode of the lower speed lines.
4. An apparatus as in claim 2 , wherein the line interface module comprises:
an optical to electrical module converting the multiplexed network data carried by the higher speed line to an electrical signal;
a deserializer deserializing the multiplexed network data;
a demultiplexer demultiplexing the deserialized network data;
a HEC delineator assembling the demultiplexed network data into cells;
a reassembler reassembling the cells into packets for analysis by a single network analyzer; and
a statistics gatherer extracting the telemetry data from the overhead bytes of the SONET frame for analysis by a computer.
5. An apparatus as in claim 2 , further comprising inverse multiplexing the demultiplexed network data before assembling the demultiplexed network data into cells.
6. An apparatus as in claim 1 , wherein the concentrator comprises:
a plurality of optical to electrical modules which convert the network data from the plurality of lower speed lines, respectively, into electrical signals, each optical to electrical module including an optical power meter that collects telemetry data from the network data;
a multiplexer multiplexing the converted network data into multiplexed network data, framing the multiplexed network data in a SONET/SDH frame structure, and inserting the telemetry data collected by the optical power meters and additional telemetry data collected by the multiplexer into overhead bytes of the SONET/SDH frame structure;
a serializer serializing the framed multiplexed network data having inserted telemetry data; and
an electrical to optical module converting the serialized data into an optical signal, the optical signal being the multiplexed network data carried on the higher speed line.
7. An apparatus as in claim 1 , wherein the concentrator includes software for multiplexing the network data, said software being upgradeable through a remote optical link.
8. An apparatus as in claim 1 , wherein the concentrator is located remotely, the multiplexed network data is carried by the network, and the distributed network analyzer is located locally.
9. An apparatus comprising:
a concentrator multiplexing network data from different links in a network and carried on a plurality of lower speed lines into multiplexed network data carried on a higher speed line; and
a line interface module demultiplexing the multiplexed network data carried on the higher speed line, assembling the demultiplexed network data into cells, and reassembling the cells into packets for analysis by a single distributed network analyzer, wherein the concentrator inserts telemetry data relating to the network data carried by each of the plurality of lower speed lines into overhead bytes of the higher speed line carrying the multiplexed network data.
10. An apparatus as in claim 9 , wherein the line interface module extracts the telemetry data from the higher speed line for processing by a computer.
11. An apparatus as in claim 9 , further comprising a distributed network analyzer analyzing the reassembled network data.
12. An apparatus as in claim 9 , further comprising a remote link with the concentrator controlling a mapping mode of the lower speed lines.
13. An apparatus as in claim 9 , wherein the concentrator comprises:
a plurality of optical to electrical modules converting the network data from the plurality of lower speed lines, respectively, into electrical signals, each optical to electrical module including an optical power meter that collects telemetry data from the network data;
a multiplexer multiplexing the converted network data into multiplexed network data, framing the multiplexed network data in a SONLT/SDH frame structure, and inserting the telemetry data collected by the optical power meters and additional telemetry data collected by the multiplexer into overhead bytes of the SONLT/SDH frame structure;
a serializer serializing the framed multiplexed network data having inserted telemetry data; and
an electrical to optical module converting the serialized data into an optical signal, the optical signal being the multiplexed network data carried on the higher speed line.
14. An apparatus as in claim 9 , wherein the line interface module comprises:
an optical to electrical module converting the multiplexed network data carried by the higher speed line to an electrical signal;
a deserializer deserializing the multiplexed network data;
a demultiplexer demultiplexing the deserialized network data;
a HEC delineator assembling the demultiplexed network data into cells;
a reassembler reassembling the cells into packets for analysis by a single network analyzer; and
a statistics gatherer extracting the telemetry data from the overhead bytes of the SONET frame for analysis by a computer.
15. An apparatus as in claim 9 , wherein the concentrator includes software for multiplexing the network data, said software being upgradeable through a remote optical link.
16. An apparatus as in claim 9 , further comprising inverse multiplexing the demultiplexed network data before assembling the demultiplexed network data into cells.
17. A method comprising:
concentrating, by a concentrator, a plurality of network data from different links in a network carried on a plurality of lower speed lines into multiplexed network data carried on a higher speed line;
deconstructing the multiplexed network data carried on the higher speed line;
and simultaneously analyzing the network data from the different links with a single distributed network analyzer using the deconstructed network data, wherein said concentrating comprises:
collecting telemetry data from each of the plurality of lower speed lines; and
multiplexing the network data from the different links into multiplexed network data in a SONET frame structure, and inserting the collected telemetry data from each of the plurality of lower speed lines into overhead bytes of the SONET frame structure.
18. A method as in claim 17 , wherein said deconstructing comprises:
demultiplexing the multiplexed network data;
assembling the demultiplexed network data into cells;
extracting the telemetry data from the overhead bytes of the SONET frame structure for analysis by a computer; and
reassembling the cells into packets for analysis by the single distributed network analyzer.