Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1997-04-11
1999-06-01
Hofsass, Jeffery A.
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370401, 370402, 370403, 370404, H04L 1228
Patent
active
059094419
ABSTRACT:
To ensure a LES issues address resolution responses when necessary, an association between a MAC/ATM address pair and an intersubnet shortcut virtual channel connection (VCC) is registered. When the LES receives a first data frame being sent from a first station to a second station, with the second station having a MAC address associated with a shortcut VCC, a second data frame is created. The second data frame has as a source address the MAC address. The second frame is sent to devices associated with the first station so that the devices may learn the origination point for the second station and can issue messaging necessary to establish an shortcut VCC. In addition, frame loss reduction in an ATM communications network is accomplished by registering an association between a MAC address of a router associated with a MAC/ATM address pair, and a shortcut VCC. After the association is registered, a data frame being sent from a first station to a second station is received. The second station has the same MAC address as the MAC/ATM address pair. The destination MAC address of the data frame is replaced with the MAC address of the router, wherein the data frame can now be delivered. Also, a first station is prevented from having to wait to send data to a second station over a newly created shortcut VCC by registering an association between a MAC/ATM address pair and a shortcut VCC. Next, a flush request message from an edge device on an ELAN is received. The flush request has a destination ATM address equal to the ATM address of the MAC/ATM address pair. A flush response message is sent to the edge device, where upon receiving the flush response message, the edge device will start sending data from the first station to the second station over the newly created shortcut VCC.
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patent: 5600644 (1997-02-01), Chang et al.
Alexander, Jr. Cedell Adam
Rovner Edward Joel
Rovner Sonia Kiang
Hofsass Jeffery A.
International Business Machines - Corporation
Slavitt Mitchell
Timar John J.
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