Counter multi-failure system and common link terminal device used therein
AssigneeAlaxala Networks Corporation
InventorTakehiro Yoshimaru
Life of this patent
Estimating the term…
Abstract
In a communication network including a monitor device, a relay device, and a common link terminal device, in response to detection of a link failure in a ring, each device sends a failure detection frame to the ring and causes link failure information to reach the common link terminal device. The common link terminal device generates a link failure information management database, performs a multi-failure detection process, and stops transmission of an auxiliary monitor frame upon detection of multiple failures.
Claims7
A counter multi-failure system of dealing with multiple link failures occurring in a communication network including a first ring and a second ring connected to the first ring by sharing part of a link in the first ring as a common link,
- the counter multi-failure system comprising:
- a common link terminal device located at a terminal end of the common link and configured to send an auxiliary monitor frame to the second ring;
- and
- a monitor device located on the second ring and configured to receive a monitor frame sent by the monitor device and circled through the second ring, as well as the auxiliary monitor frame and block at least one specific port among ports connecting with the second ring,
- the common link terminal device having:
- a communication unit configured to send the auxiliary monitor frame and receive a failure detection frame sent from a device located on a ring in the occurrence of a link failure in the ring;
- a storage unit configured to store link failure information included in the failure detection frame;
- and
- a controller configured to identify occurrence or non-occurrence of multiple failures including a failure on the common link based on the stored link failure information and, upon identification of the occurrence of multiple failures, to control the communication unit to stop transmission of the auxiliary monitor frame,
- wherein the monitor device cancels the blocking of the specific port in the case of non-reception of the monitor frame for a preset time period and non-reception of the auxiliary monitor frame.
In a communication network including a first ring and a second ring connected to the first ring by sharing part of a link in the first ring as a common link, a common link terminal device located at a terminal end of the common link, the common link terminal device comprising:
- a communication unit configured to send an auxiliary monitor frame to a monitor device located on the second ring and receive a failure detection frame sent from a device located on a ring in the occurrence of a link failure in the ring;
- a storage unit configured to store link failure information included in the failure detection frame;
- and
- a controller configured to identify occurrence or non-occurrence of multiple failures including a failure on the common link based on the stored link failure information and, upon identification of the occurrence of multiple failures, to control the communication unit to stop transmission of the auxiliary monitor frame.
Dependencies are inferred from the claim text.