摘要:
The invention provides a method for segregating traffic amongst a plurality of stations that are associated with an access point, comprising the steps of providing a protocol for virtual local area network (VLAN) discovery; allowing a station to create a new port that serves a new VLAN, or to join an existing VLAN; maintaining more than one logical port per physical port; and providing cryptographic VLAN separation, wherein traffic within one VLAN is separated from another VLAN on a same physical port by cryptography.
摘要:
The invention provides an apparatus for segregating traffic amongst stations (STAs) that are associated with a bridge, comprising a personal virtual bridged local area network (personal VLAN) that uses a VLAN to segregate traffic.
摘要:
A method and apparatus is provided for searching a knowledge base to determine whether a search object matches any of a plurality of knowledge base entries. When the knowledge base includes a partially matched entry, the group of partially matched entries (elements (3, 5, 7, 9, and 11) in the figure) is identified. Thereafter, at least one previously unselected search object bit is selected and examined to determine whether the group of partially matched entries includes a further matched entry the represents the same bit pattern in its bit that corresponds to the previously unselected search object bit and when it does not, the search is terminated indicating no match.
摘要:
An asymmetric network communication system for use in a client-host environment having independent forward and return channels operating at different speeds and/or under different protocols on the same or different communication media to provide efficient utilization of shared resources. A network manager, such as a hybrid access system, effects transmission of packetized data on a forward (downstream) channel from the host server to multiple client devices coupled with a shared downstream media at 10 or more megabits per second while simultaneously providing selectable multiple lower speeds of operation on shared or dedicated return (upstream) channels from the client devices to the host server depending on bandwidth availability, bandwidth demand, service level authorization, etc, for the return channel. Forward and return channels may be located on the same or different communication medium including a CATV network, direct broadcast satellite network, television or radio RF broadcast network, wireless or mobile cellular facilities or the like. The return channel may reside on a PSTN either directly coupled with the host server or connected with the network manager for subsequent transmission to the host server. The network manager handles or controls the forward and return communication to establish asymmetric communication between the host and plural client devices in a way to pre-authorize the amount of upstream data sent by a remote client.
摘要:
In a managed repeater (10) having an address learn capability wherein receipt at a particular port (30) of a data packet having a received source address different from a stored source address associated with the particular port replaces the stored source address with the received source address, a source address locking circuit includes an address learn circuit associated with the particular port, for replacing the stored source address with the received source address when the stored source address does not match the received source address, and an address lock register for the particular port, coupled to the address learn circuit, for storing a bit value to disable the address learn circuit from replacing the stored source address with the received source address. This managed repeater provides improved security in a network having source address updating by allowing an administrator to disable the source address update for a particular port in the managed repeater. Each address lock register is externally programmable, and the administrator is able to program time windows to disable source address updating for a particular port. The administrator may program each address lock register independently to prevent the stored source address associated with each port from being updated. The managed repeater allows the administrator to determine on a per port basis whether the managed repeater's address learning capability should be enabled or disabled for a programmable time window.
摘要:
The invention provides an apparatus for segregating traffic amongst stations (STAs) that are associated with a bridge, comprising a personal virtual bridged local area network (personal VLAN) that uses a VLAN to segregate traffic.
摘要:
A method and apparatus is provided for searching a knowledge base to determine whether a search object matches any of a plurality of knowledge base entries. When the knowledge base includes a partially matched entry, the group of partially matched entries (elements (3, 5, 7, 9, and 11) in the figure) is identified. Thereafter, at least one previously unselected search object bit is selected and examined to determine whether the group of partially matched entries includes a further matched entry the represents the same bit pattern in its bit that corresponds to the previously unselected search object bit and when it does not, the search is terminated indicating no match.
摘要:
The invention provides an apparatus for segregating traffic amongst stations (STAs) that are associated with a bridge, comprising a personal virtual bridged local area network (personal VLAN) that uses a VLAN to segregate traffic.
摘要:
A network switch including one or more network ports for receiving and transmitting data, where each port includes a network interface, a data bus interface and a processor port interface. a data bus coupled to the data bus interface of each of the ports, a processor bus coupled to a processor and to the processor port interface of each of the ports, and a memory bus coupled to a memory. The network switch further includes a switch manager coupled to the data bus, the processor bus and the memory bus for controlling data flow between the ports and said memory and for enabling the processor access to the ports and the memory. In this manner, the processor has direct and relatively independent access to the network ports for performing overhead functions, such as monitoring, determining status and configuration without consuming valuable bandwidth of the data bus.
摘要:
A programmable arbitration system including control logic to select one of several arbitration schemes for selecting the ports of a network switch, a memory to store priority values indicating the relative priority of each of the ports, monitor logic to monitor each of the ports and to program the priority values in the memory based on a priority scheme selected by the control logic, and arbitration logic to select a port having the next highest priority. The arbitration schemes preferably include a round-robin priority scheme, a first-come, first-served (FCFS) priority scheme, a weighted priority scheme, or any other desirable priority scheme. The monitor logic includes polling logic to periodically poll the ports and to program a priority value of each port. The memory includes receive and transmit lists to indicate of which of the ports have indicated needing service and a corresponding priority value. The arbitration logic includes a receive arbiter and a transmit arbiter, each of which use a corresponding arbitration count.