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4-Traders Homepage  >  Equities  >  Nyse  >  International Business Machines Corp.    IBM

Delayed Quote. Delayed  - 08/25 10:00:55 pm
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International Business Machines : Patent Issued for Selectively Refreshing Address Registration Information (USPTO 9419879)

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08/25/2016 | 10:58pm CEST

By a News Reporter-Staff News Editor at Computer Weekly News -- From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Haggar, Jeffrey D. (Holly Spring, NC); Ratcliff, Bruce (Red Hook, NY); Rau, Benjamin T. (Raleigh, NC); Stevens, Jerry W. (Raleigh, NC), filed on June 20, 2013, was published online on August 16, 2016.

The patent's assignee for patent number 9419879 is INTERNATIONAL BUSINESS MACHINES CORPORATION (Armonk, NY).

News editors obtained the following quote from the background information supplied by the inventors: "One aspect relates, in general, to network communications, and in particular, to the refreshing of address registration information used in communicating within a network.

"Networks, such as Ethernet networks, maintain routing tables to facilitate routing of frames within the network. One example of a routing table is a Media Access Control (MAC) forwarding table that includes MAC addresses used in routing frames within the network. The size of this table varies depending on the size and cost of the physical switch. With the increase in size of Layer 2 Networks in customer data centers, due to the convergence of the 10/100 networks into the 1G/10G networks, the possibility of a MAC forwarding table becoming full has dramatically increased. To help keep the MAC forwarding tables filled with only 'active' MAC entries, many switch vendors have adopted a five minute MAC timeout value. This means if a switch port does not receive a packet with a source MAC address which is currently active in the MAC forwarding table over the five minute interval, this MAC address is purged from the forwarding table.

"Once the MAC address is purged from the forwarding table, all packets received with a destination MAC address, which is not present in the MAC forwarding table, is broadcast/forwarded to all switch ports associated with the port group. This can cause significant switch and network performance issues depending on the overall Local Area Network (LAN) utilization."

As a supplement to the background information on this patent, VerticalNews correspondents also obtained the inventors' summary information for this patent: "Shortcomings of the prior art are overcome and additional advantages are provided through the provision of a computer program product for facilitating communications within a processing environment. The computer program product includes a computer readable storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method. The method includes, for instance, monitoring, for a predefined amount of time, inbound traffic and outbound traffic on a virtual interface of the processing environment; determining based on the monitoring whether for a selected component of the virtual interface an inbound frame has been received but an outbound frame has not been transmitted for the predefined amount of time; and based on determining that the inbound frame has been received but the outbound frame has not been transmitted, forwarding a generated outbound frame to cause address registration information for the virtual interface to be refreshed.

"Methods and systems relating to one or more aspects are also described and claimed herein. Further, services relating to one or more aspects are also described and may be claimed herein.

"Additional features and advantages are realized through the techniques described herein. Other embodiments and aspects are described in detail herein and are considered a part of the claimed aspects."

For additional information on this patent, see: Haggar, Jeffrey D.; Ratcliff, Bruce; Rau, Benjamin T.; Stevens, Jerry W.. Selectively Refreshing Address Registration Information. U.S. Patent Number 9419879, filed June 20, 2013, and published online on August 16, 2016. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9419879.PN.&OS=PN/9419879RS=PN/9419879

Keywords for this news article include: Computers, INTERNATIONAL BUSINESS MACHINES CORPORATION.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2016, NewsRx LLC

(c) 2016 NewsRx LLC, source Technology Newsletters

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Financials ($)
Sales 2016 79 586 M
EBIT 2016 14 813 M
Net income 2016 11 887 M
Debt 2016 33 878 M
Yield 2016 3,29%
P/E ratio 2016 12,99
P/E ratio 2017 12,45
EV / Sales 2016 2,34x
EV / Sales 2017 2,34x
Capitalization 152 027 M
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Number of Analysts 25
Average target price 156 $
Spread / Average Target -1,9%
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Virginia M. Rometty Chairman, President & Chief Executive Officer
James J. Kavanaugh Senior Vice President-Transformation & Operations
Martin J. Schroeter Chief Financial Officer & Senior Vice President
Jeff Smith Chief Information Officer
Sidney Taurel Independent Director
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