Network system and node apparatus
AssigneeHitachi, Ltd.
InventorsKazuma Yumoto, Hirofumi Masukawa, Hitoshi Yoshida, Kazuhiro Kusama, Takuro Mori
Life of this patent
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Abstract
A failure detection protocol is applied so that failure detection requests for the same aggregated link can be processed even when the failure detection requests differ among routing protocols. The failure detection protocol is executed for each of the physical links that form an aggregated link, and a notification is sent to a higher-level application (for example, a routing protocol), which is a requesting source of a communication line failure monitoring request, with a discrimination between a case in which the communication of the aggregated link in its entirety fails and a case in which some physical links of the aggregated link fail.
Claims11
A network system, comprising:
- a plurality of node apparatuses each of which forms an aggregated link having a plurality of physical links, at least one of said plurality of node apparatuses comprising a storage unit in which a failure detection protocol, which monitors for communication line failure in the aggregated link formed by the node apparatus, is stored, and a control unit that executes the failure detection protocol, and
- wherein said control unit:
- stores each failure monitoring request for the aggregated link issued by a routing protocol in each requesting source, each failure monitoring request indicating a corresponding requesting source that issued the failure monitoring request and specifying a corresponding failure detection notification condition for the failure monitoring request,
- performs a failure monitoring operation on the aggregated link with each of the plurality of physical links of the aggregated link identified for each failure monitoring request, and
- for each failure monitoring request, when a communication failure on one or more of the physical links of the aggregated link is detected, checks the corresponding failure detection notification condition of the failure monitoring request in accordance with predetermined information provided in the failure monitoring request that specifies whether a notification is desired when a communication of all physical links of the aggregated link fails or a notification is desired when a communication of a specified number of physical links of the aggregated link fails, and, when the failure detection notification condition corresponding to the failure monitoring request is satisfied, sends a failure detection notification to the requesting source that issued the failure monitoring request.
A node apparatus accommodating an aggregated link having a plurality of physical links, the node apparatus comprising:
- a storage unit in which a failure detection protocol, which monitors for communication line failure in the aggregated link accommodated by the node apparatus, is stored;
- and
- a control unit that executes the failure detection protocol,
- wherein said control unit:
- stores each failure monitoring request for the aggregated link issued by a routing protocol each requesting source, each failure monitoring request indicating a corresponding requesting source that issued the failure monitoring request and specifying a corresponding failure detection notification condition for the failure monitoring request,
- performs a failure monitoring operation on the aggregated link with each of the plurality of physical links of the aggregated link identified for each failure monitoring request, and
- for each failure monitoring request, when a communication failure on one or more of the physical links of the aggregated link is detected, checks the corresponding failure detection notification condition of the failure monitoring request in accordance with predetermined information provided in the failure monitoring request that specifies whether a notification is desired when a communication of all physical links of the aggregated link fails or a notification is desired when a communication of a specified number of physical links of the aggregated link fails, and, when the failure detection notification condition corresponding to the failure monitoring request is satisfied, sends a failure detection notification to the requesting source that issued the failure monitoring request.
Dependencies are inferred from the claim text.