Alaxala Networks Corporation

Manabu Fujita

Masaya Arai

Ken Watanabe

Kensuke Ino

A Provider Edge PEreplicates a received packet and relays these to virtual circuits VC, VCrespectively, and Provider Edges PE, PErespectively receive the packets from the virtual circuits VC, VC, whereupon the Provider Edges PE, PE, on the basis of an agreement between them, decide to handle the received packets such that one of the first edges relays the packet to a Customer Edge CEfor forwarding to a Host A, while the other edge discards the packet without relaying it to the Customer Edge CE

Data communication system and method for preventing packet proliferation in a multi-device link aggregation network

When the provider edge PEdetects the occurrence of a failure at the access line AL, it sends the label withdraw message to the virtual circuit VC, and when the provider edge PEreceives the label withdraw message sent via the virtual circuit VC, the access line ALis put to a link down state, and when the customer edge CEdetects the link down state of the access line AL, it switches from the normal path to the redundant path.

Data communication system, device and method of detecting a failure on an access line in a network

Data communication system and method for preventing packet proliferation in a multi-device link aggregate network

When a network apparatus of this invention receives an IEEE 802.3ad link application control packet from a subscriber line with a VPWS function, it processes the packet in a control unit without relaying the packet by VPWS. More specifically, the network apparatus receives an IEEE802.3ad link aggregation control packet along with receiving an IEEE802.3x flow control packet. The network apparatus transmits a link aggregation control packet. The network apparatus also relays other layer 2 control protocol packets without receiving them, and does not transmit the other layer 2 control protocol packets.

Network apparatus and method for forwarding packet

A Provider Edge PEreplicates a received packet and relays these to virtual circuits VC, VCrespectively, and Provider Edges PE, PErespectively receive the packets from the virtual circuits VC, VC, whereupon the Provider Edges PE, PE, on the basis of an agreement between them, decide to handle the received packets such that one of the edges relays the packet to a Customer Edge CEfor forwarding to a Host A, while the other edge discards the packet without relaying it to the Customer Edge CE

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Kawasaki, Japan

Manabu Fujita