Automatic generation of OAM cells for connection continuity detection
AssigneeCisco Technology, Inc.
InventorsAmit Agrawal, Madhu R. Grandhi, Madhav V. Marathe
Life of this patent
Estimating the term…
Abstract
An asynchronous transfer mode (ATM) switch is configured to automatically generate Operations, Administration and Management (OAM) cells for a loopback test at a first connection whenever the first connection is not receiving user data traffic. The ATM switch may include a switch management module which generates the OAM cells that are transmitted from the first connection whenever a control processor initiates the loopback test.
Claims42
An asynchronous transfer mode (ATM) switch comprising:
- a control processor to search an activity log to determine whether a first connection of the ATM switch has received traffic and to automatically initiate a loopback test at times when said first connection of the ATM switch is not receiving traffic.
An asynchronous transfer mode (ATM) network comprising:
- a first switch coupled to a first communication link;
- and
- a second switch coupled to the first switch via the first communication link;
- the first switch to search a first activity log to determine whether a first connection has received traffic and to automatically transmit a first set of Operations, Administration and Management (OAM) cells to the second switch via the first communication link and the second switch to search a second activity log to determine whether a second connection has received traffic and to automatically transmit a second set of OAM cells to the first switch via the first communication link at times when the first and second switches are not exchanging data cells on said first and second virtual connections associated with the first communication link.
A method comprising:
- searching an activity log to determine whether a first virtual connection within a network has recently received data traffic;
- and, if not,
- automatically initiating a loopback test for the first virtual connection.
A system comprising:
- means for searching an activity log to determine whether a first virtual connection within a network has recently received data traffic;
- and, if not,
- means for automatically initiating a loopback test for the first virtual connection.
A computer readable medium containing executable instructions, which, when executed in a processing system, cause said processing system to perform a method comprising:
- searching an activity log to determine whether a first virtual connection within a network has recently received data traffic;
- and, if not,
- automatically initiating a loopback test for the first virtual connection.
Dependencies are inferred from the claim text.