Integrated network interconnecting device and probe

• US 6,112,241 A
• Filed: 10/21/1997
• Issued: 08/29/2000
• Est. Priority Date: 10/21/1997
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Suffern, Edward Stanley, Linville, John Walter, Warren, Jeffrey Robert, Abdelnour, George Michel
• Primary Examiner(s): Maung, Zarni
• Assistant Examiner(s): Najjar, Saleh
• Application Number:
  US08/955,276
• Time in Patent Office: 1,043 Days
• Field of Search: 395/200.54, 395/200.47, 395/200.79, 364/550, 364/551.01, 709/224, 709/217, 709/249, 710/131, 370/218, 370/219, 370/220, 370/233, 370/234, 370/241, 370/244, 370/250, 370/360
• US Class Current: 709/224
• CPC Class Codes: H04L 41/00 Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks

Abstract

A Local Area Network (LAN) Switch includes conventional switching functions and integrated Remote Monitoring (RMON) Universal Feature Card (UFC). The UFC allows simultaneously statistically monitoring the traffic on all ports, 100% monitoring of the traffic on one port, and monitoring the internal LAN Switch switching fabric to obtain RMON statistics about the operation of networks attached to the LAN Switch.

Claims

1. A network interconnecting device including:

a housing;

at least two ports coupled to the housing;

a switching fabric, operative in transporting electrical signals, disposed within the housing;

a processor subsystem operatively coupled to the switch fabric;

a first circuit arrangement operatively coupling the at least two ports and the switching fabric, said circuit arrangement operative to route electrical signals representative of information packets between the at least two ports; and

a single probe mounted within the housing and operatively coupled to the switching fabric and the at least two ports wherein said single probe gathers and provides statistical information from the at least two ports.

2. The network interconnecting device of claim 1 wherein gathering and providing statistical information is consistent with RFC 1757.

3. The network interconnecting device of claim 1 further including at least a third port coupled to the housing;

and

a second circuit arrangement interconnecting the at least third port to the switching fabric wherein the at least third port operates at a data rate higher than the data rate of the at least two ports.

4. The network interconnecting device of claim 1 wherein the switching fabric includes a bus.

5. The network interconnecting device of claim 4 wherein the second circuit arrangement includes circuits that process signals from an Asynchronous Transfer Mode (ATM) network.

6. The network interconnecting device of claim 1 wherein the probe includes a Programmable Logic Device (PLD) operatively coupled to receive signals from the ports and selecting at least one of said signals;

circuit arrangement that processes the selected at least one of said signals in accordance with a predetermined protocol to detect data signals therefrom;

a first storage that stores the data signals; and

a controller that analyses the data signals to provide predetermined statistical data indicating operational status at the ports.

7. The network interconnecting device of claim 6 wherein the probe further includes an interface that monitors information on the switching fabric;

a second circuit arrangement for processing monitored information to extract data signals representative of selected ones of the monitored information; and

storage, accessible to the controller, for storing the data signal.

8. The network interconnecting device of claim 6 wherein the controller includes a programmed processor.

9. The network interconnecting device of claim 6 wherein the Programmable Logic Device further includes a first MUX;

a second MUX;

electrical conductors connecting the first MUX and the second MUX in parallel configuration relative to each other and in serial configuration with each port; and

selection circuit arrangement response to first control signals from the controller to output signals to enable the first MUX and the second MUX to gather signals from selected ports.

10. The network interconnecting device of claim 9 wherein the selection circuit arrangement includes a register.

11. The network interconnecting device of claim 1 wherein the single probe gathers and provides statistical information regarding internal operations of said interconnecting device.

12. A probe for monitoring networks coupled by an interconnecting device including:

a circuit arrangement, mounted inside the interconnecting device, that collects signals on a fixed time basis manner or time-slice manner at ports of said interconnecting device;

a logic circuit arrangement that processes the signals and generating statistical information therefrom; and

a processor based system that processes said statistical information and arranging them into RMON data groups as specified by RFC 1757 standard.

13. The probe of claim 12 wherein at least the processor based system, the circuit arrangement and the logic circuit arrangement are packaged as a Universal Feature Card (UFC) for integrally mounting in said interconnecting device.

14. The probe of claim 12 further including a management station executing software programs for accessing the processor based system and displaying selected RMON data groups.

15. A probe for integrating in a network interconnecting device including:

a first interface with circuits that monitor signals from at least one port within a group of ports to collect data on a fixed time basis from said at least one port;

a second interface with circuits that roves the ports in the group and monitors signals to collect data on a time-slice basis; and

a controller that processes the data and arranges the processed data in a Management Information Base (MIB).

16. The probe of claim 15 wherein fixed data collection and roving data collection are done simultaneously.

17. The probe set forth in claim 15 wherein the data are gathered and arranged to comply with RFC 1757 Standard.

18. The probe set forth in claim 15 further including a third interface that monitors internal operations of the network interconnect device to gather internal statistics.

19. A method to gather statistical information from a network interconnecting device including the steps of:

using circuits in a first interface of a probe to collect the statistical information on a fixed time basis from at least one port in a group of ports;

using circuits in a second interface of said probe to rove the ports in said group of ports and collect the statistical information on a time slice basis; and

using a controller to process the statistical information and arranging in a Management Information Base.

20. The method of claim 19 further including the steps of collecting fixed data and roving data simultaneously.