System and method for reduced frame flooding

Details System and method for reduced frame flooding System and method for reduced frame flooding

2006-02-14

2006-02-14

Ton, Dang (Department: 2666)

Multiplex communications

Data flow congestion prevention or control

Control of data admission to the network

C370S389000

Reexamination Certificate

active

06999418

ABSTRACT:
A network device monitors the flooding of frames and obtains information to update a port's forwarding table to reduce unnecessary frame flooding. An unknown network address and a count are maintained at a first port, the unknown address being an address for which there is no information identifying another port to which unicast frames containing the address are to be forwarded, the count identifying the number of times frames containing the unknown address have been flooded from the first port to other ports. The count is incremented each time a unicast frame containing the unknown address is flooded from the first port to the other ports. When the count reaches a threshold, it is determined whether there is information at another port that identifies a specific port to which frames containing the unknown address are to be forwarded, and if so then the information is transferred to the first port, whereupon the unknown address becomes known at the first port. Subsequently, unicast frames received at the first port that contain the now known address are forwarded to only the specific port rather than being flooded.

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