초록 ▼

A derived virtual local area network (VLAN) mapping technique enables centralized control of broadcast domains by a switch capable of supporting different protocols carried within frames that are distributed throughout a computer internetwork. Associated with each incoming frame received at the swit

A derived virtual local area network (VLAN) mapping technique enables centralized control of broadcast domains by a switch capable of supporting different protocols carried within frames that are distributed throughout a computer internetwork. Associated with each incoming frame received at the switch are characteristics such as protocol type and/or subnet information, and associated with each input port of the switch are characteristics such as VLAN and/or index values. Utilizing certain of these characteristics, a derived VLAN value is generated that allows users to create arbitrary VLAN domains and reduce broadcast traffic received by stations of the domains.

대표청구항 ▼

[What is claimed is:] [1.]associating (i) each frame received at the switch with one of a protocol type value and a subnet value and (ii) each input port of the switch with one of a virtual local area network (VLAN) value and index value;creating a mapping address from predetermined ones of the valu

[What is claimed is:] [1.]associating (i) each frame received at the switch with one of a protocol type value and a subnet value and (ii) each input port of the switch with one of a virtual local area network (VLAN) value and index value;creating a mapping address from predetermined ones of the values;selecting one of a plurality of entries of a translation structure using the created mapping address to generate a derived VLAN value; andaccessing a forwarding database using the derived VLAN value to determine an output port for the received frame to thereby control a broadcast domain.