Via Technologies, Inc.

Yun-Fei Chao

Wei-Pin Chen

Jen-Kai Chen

Ming-Chao Chung

Ying-Chung Chen

Edward Ku

A method for expanding a service VLAN space of a provider network is provided. A bit number occupied by a taq protocol identifier (TPID) in a TPID field is reduced to leave a plurality of spare bits. The spare bits of the TPID field is then used to represent a first portion of a service VLAN identifier. A VLAN identifier field of a tag control information (TCI) field is used to represent a second portion of the service VLAN identifier. The first and second portions are then combined to obtain the service VLAN identifier of the packets completely.

Method for expanding the service VLAN space of a provider network

A data-packet processing method is used in a network system. The network system includes a buffer for optionally storing a data packet to be transferred, and the method includes steps of: determining a type of the data packet to be transferred; determining a storage state of a buffer where the data packet is to be temporarily stored before transferring; and storing the data packet into the buffer if the storage state of the buffer is a packet-accepting storage state; wherein the packet-accepting storage state of the buffer varies with the type of the data packet.

Data-packet processing method in network system

A method for processing packets of a VLAN in a network switch is provided. The VLAN comprises a plurality of physical LANs and are divided into a plurality of subnets. The method comprises the steps of: receiving a packet through an ingress port of the network switch, wherein the packet is tagged with a VID of the VLAN; finding a VLAN member according to the VID, wherein the VLAN member represents all ports of the network switch dedicated to serving packets of the VLAN; finding a forwarding scope according to the ingress port, wherein the ingress port is one of the ports dedicated to serving packets of a first subnet of the VLAN and the forwarding scope represents all ports of the network switch dedicated to serving packets of the first subnet; and determining an egress port of the packet according to both the VLAN member and the forwarding scope.

Method for processing packets of a VLAN in a network switch

A method and apparatus for accessing a non-symmetric dual-slot address table having two entriesthat are different in size. When writing data, the data is hashed to generate a hash value. Then, the data is written to a slot corresponding to the hash value in the entryWhen there was data in the slotthe hash value is mapped to a sub-address and a share value, and then a slotcorresponding to the sub-address is selected from the entryAfterwards, the SMAC tag, the share value and the source port are written to the slotIn addition, when transmitting the packet, a hash value is generated according to the DMAC address. Then, a SMAC tag, the share value and the source port are read according to the hash value. After compared, the packet is transmitted.

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Taipei, Taiwan

Yun-Fei Chao