Detection of potential forwarding loops in bridged networks

Details Detection of potential forwarding loops in bridged networks Detection of potential forwarding loops in bridged networks

2006-05-01

2008-11-18

Kizou, Hassan (Department: 2619)

Multiplex communications

Diagnostic testing

Path check

C370S256000, C370S401000, C709S221000, C709S222000

Reexamination Certificate

active

07453818

ABSTRACT:
Potential forwarding loops in bridged networks are detected. A switch monitors the movement of packet addresses in the forwarding table to different ports. If the port associated with an address changes multiple times in a short time duration, then a potential forwarding loop is detected, and a loop corrector is notified to take appropriate action to correct the problem, such as, but not limited to changing the state of a port to a blocking state or disabling an interface, etc. If there are multiple movements outside the short time duration, they may be correct movements adjusting to the actual reconfiguration of a network, and thus, these movements are effectively filtered out of consideration.

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