Modular scanning system for cabling systems

• US 20050111063A1
• Filed: 10/12/2004
• Published: 05/26/2005
• Est. Priority Date: 09/21/2003
• Status: Abandoned Application

• Current Assignee: RiT Technologies Ltd.
• Original Assignee: RiT Technologies Ltd.
• Inventors: Shar, Alex, Cherches, Barak
• Application Number:
  US10/963,422
• Publication Number:
  US 20050111063A1
• Time in Patent Office: Days
• US Class Current: 358/514
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 43/0811 by checking connectivity

Abstract

Method and system for acquiring and updating the topology of a modular scanning system, in which patch panels are scanned. The result of the scanning of each panel is forwarded to a memory cell of an expander. The output of each expander is forwarded to a cell of a successive expander, and so forth, until the output of a final expander is forwarded to a master. Each scanning unit forwards unique ID data to an expander, to which said scanning unit is connected. The unique ID data is relayed from the expander to higher level expanders, all of which are connected in series with respect to one another, until reaching a second level expander, from which the ID data is forwarded to the master where it is stored. This process is repeated while the ID data replaced with neighbors'"'"' data, for allowing the master to know which scanning unit is connected to which scanning unit. Finally, the topology map is generated in the master from the collection of ID data and neighbors'"'"' data stored therein.

Claims

1. Method for acquiring and updating the topology of a modular scanning system, in which patch panels are scanned, the result of the scanning of each panel is forwarded to a memory cell of an expander, the output of each expander is forwarded to a cell of a successive expander, and so on, until the output of a final expander is forwarded to a master.

2. Method according to claim 1, which comprises:

a) forwarding, by each scanning unit, unique ID data to an expander to which said scanning unit is connected;

b) relaying said unique ID data from said expander to higher level expanders, all of which are connected in series with respect to one another, until reaching a second level expander, from which said ID data is forwarded to said master where it is stored;

c) repeating steps (a) and (b), with the ID data replaced with neighbors'"'"' data, for allowing said master to know which scanning unit is connected to which scanning unit; and

d) generating, in said master, the topology map from the collection of ID data and neighbors'"'"' data stored in said master.

3. Method according to claim 2, further comprising forwarding, by each patch panel in the modular scanning system its unique ID data to the scanner to which it is connected, for notifying said scanner of its existence, after which the ID data of said patch panel is forwarded from said scanner to an expander to which it is connected, said expander relaying said ID data to higher level expanders, until reaching the master, where the ID data is stored.

4. Method according to claim 3, wherein in each expander there is stored a copy of only the ID data of scanning units, and/or patch panels that are connected to its output ports.

5. Method according to claim 3, wherein each expander keeps a copy of every ID data that is relayed by it to a higher level expander, or to the master.

6. Method according to claim 3, wherein the topology map is updatable in the following ways:

(a) whenever a new scanning unit is connected to an existing expander, or to the master, said new scanning unit forwarding its ID data to the expander, to which said new scanning unit is connected, and said ID data being relayed form said expander to higher level expanders until reaching said master;

or directly to said master;

(b) identifying whenever a scanning unit is disconnected or in inactive mode of operation by performing verification process, comprising;

b.1) forwarding verification signals from said master to each one of its output ports, for generating or updating its neighbors data, and for making sure that none of the scanning units, which are assumed to be connected to respective output ports, had been switched to inactive mode, or removed, or disconnected, said master initiating alert message after failing to receive acknowledgement from any of said scanning units; and

b.2) for each expander, forwarding verification signals from said expander to each one of its output ports, for generating or updating its neighbors data and for making sure that none of the scanning units, which are assumed to be connected to respective output ports, had been inactivated, or disconnected, said expander noticing said master if a scanning unit is disconnected, or inactivated, by forwarding to said master, if required via higher level expanders, a corresponding message, said master responding to said notice by initiating alert message;

b.3) for each scanner, forwarding verification signals from said scanner to each one of its output ports, for generating or updating its neighbors data and for making sure that none of the patch panels, which are assumed to be connected to respective output ports, had been disconnected, said scanner noticing the expander, to which said scanner is connected, if a patch panel is disconnected, by forwarding to said expander a corresponding message, said expander relaying said message to said master, if required via higher level expanders, and said master responding by initiating alert message; and

c) forwarding, by each scanner, its neighbors data to the corresponding expander, said expander relaying the neighbors data of the scanners and their own neighbors data, to a higher level Expander, which further relays the neighbors data relayed to it, and its own neighbors data, to a higher level expander, until all of the neighbors data reaches the master, where it is stored, said master generating the topology map based on the ID data and neighbors data that are stored therein.

7. Method according to claim 2, further comprising reading, from each on one the scanners, from the patch panels connected thereto a data relating to the type of said patch panels and to the number of rows thereof.

8. Method according to claim 6, wherein the Master forwards verification signals to the scanning units directly connected thereto every predetermined time interval.

9. Method according to claim 6, wherein each Expander forwards verification signals to the scanning units, which are directly connected to its output ports, every predetermined time interval.

10. Method according to claim 6, wherein each Scanner forwards verification signals to the patch panels, which are directly connected to its output ports, every predetermined time interval.

11. Modular scanning system, which comprises, in addition to a number of patch panels and to a master, a number of sites each comprising a cascade of expanders divided in a plurality of successive levels, the output of a number of expanders in each level being the input of a single expander in the successive level.

12. System according to claim 11, wherein each site comprises:

a) a plurality of scanners, each for scanning a plurality “

x”

of patch panels;

b) a plurality of first expanders, each receiving the output of “

y”

scanners;

c) optionally, a succession of pluralities of expanders, each receiving the output of expanders of the preceding succession;

d) a final expander, receiving the output of the expanders of the last of said succession, the output of said last expander being the output of the site; and

e) the modular scanning system further comprising a master, receiving in succession the output of all the sites and being capable of drawing a map of the system and of updating it.

13. System according to claim 11, wherein the expanders of each of the succession are 8, “

y”

is 8, “

x”

is 24.

14. System according to claim 11, which comprises:

a) One or more Scanners, to each one of them is connected one or more patch panels, said scanners obtaining the connectivity status of the ports in each patch panel and controlling these ports continuously, whereby to signal, among other things, by utilizing connectivity status indicators and master indicators, wanted and unauthorized changes in the connectivity map related to said patch panels, and if a mistake has occurred in changing said status, said Scanners being uniquely identifiable by said central management system, for allowing bidirectional communication between said central management system and said Scanners; and

b) A Master, being the first and highest level, which intermediates between said Scanners and said central management system, said Master communicating control messages, and optionally other types of data, from said central management system to said Scanners, and connectivity data relating to connectivity status from said Scanners to said central management system, where the connectivity data is interpreted and the connectivity map is updated accordingly, and, whenever an erroneous or unauthorized connection is detected by said central management system, alarm messages are generated and communicated to said Scanners via said Master, and, optionally to other means, said Master being uniquely identifiable by the central management system, for allowing bidirectional communication between said central management system and said Master, and, there through, between said central management system and said Scanners, said scanners forwarding to said master their unique ID data from which said master generates the topology of said system.

15. System according to claim 14, in which the modular scanning system further comprising an Expander, being a second level Expander, that intermediates between the Master and one or more Scanners to which patch panels are connected, and allows, there through, bidirectional communication between the central management system and said Scanners, for allowing expanding the monitoring and controlling capabilities of said central management system to a larger number of patch panels, said first level expander is connectable to additional Expanders and/or scanners, said patch panels forwarding to said scanners their ID data, said scanners forwarding the ID of said patch panels, and their own ID data, to said expander, and said expander relaying said ID data of said patch panels and said scanners to said master.

16. System according to claim 15, in which the modular scanning system further comprising additional one or more Expanders, one of which is connected to the second level Expander and all of which are connected to one another, essentially in hierarchical manner to form additional levels, in which one or more Expanders at each level are connected to one or more Expanders at a higher level, and to Scanners to which patch panels are connected, and/or to Expanders at a lower level, each one of said Expanders is capable of bidirectional communication with, and is uniquely identifiable by, the central management system.

17. System according to claim 15, in which the Master communicates with the central management system via a data network.

18. System according to claim 14, in which each one of the patch panels, scanners and expanders includes a Dallas chip that allows the central management system to uniquely identify them.

19. System according to claim 14, in which each expander and scanner forwards verification signals to its out ports, for verifying whether a respective patch panel, scanner or expander, which are assumed to be connected to the respective ports, are disconnected or inactivated, each one of said output ports receiving, in response, acknowledge signals if the respective patch panel, scanner or expander is still connected, otherwise, the expander and scanner, which forwarded the verification signals notifying the master of a disconnected patch panel, scanner or expander, said master updating the topology map and initiating corresponding alert message.

20. System according to claim 14, in which whenever a new patch panel, or scanner, or expander, is connected to the system, its ID data is automatically forwarded to the master, or, if required, by relaying it from one expander to a higher level expander until said ID data reaches the master.