Fujitsu Corporation

Nitin Gogate

Zanjun Lu

Muhammad Sakhi Sarwar

Zigmunds Andis Putnins

Stephen John Unger

Jaya Sarup

Michael Green

Sanjay Sharma

Nimer Yaseen

Michael Philip Bottiglieri

David Solomon

Wendy Lao

Methods and systems are provided for detection of unauthorized entities in communication systems. The method includes obtaining a secret string by a first network element and generating a random number by the first network element. The method also includes computing a first cryptographic result by the first network element. The first cryptographic result is based on a cryptographic function, the secret string, and the random number. The method further includes attempting to transmit, by the first network element, a first packet that includes the random number to a second network element using a layer 2 packet terminating protocol. The method includes receiving, within a configured time, a second packet including a second cryptographic result at the first network element, and terminating transmission to the second network element when a second cryptographic result is different from the first cryptographic result.

Detection of unauthorized entities in communication systems

A method may include monitoring available aggregate bandwidth of a network element and determining if the available aggregate bandwidth is sufficient to communicate traffic at a rate equal to an aggregate sum of committed information rates for a plurality of classes of traffic. If the available aggregate bandwidth is sufficient to communicate traffic at the rate equal to the aggregate sum of committed information rates for a plurality of classes of traffic, traffic may be communicated for each of the plurality of classes in accordance with the respective committed information rate for each class. Otherwise, traffic may be communicated for each of the plurality of classes in an amount proportional to the respective committed information rate for a particular class and the available aggregate bandwidth.

System and method for dynamic rate limiting and shaping of traffic based on available bandwidth

A method may include: (i) provisioning a first network-side interface of a first plug-in unit and a second network-side interface of a second plug-in unit as members of a network-side protection group, the first plug-in unit and the second plug-in unit integral to an adaptation layer network element; (ii) provisioning a first client-side interface of the first plug-in unit and a second client-side interface of the second plug-in unit as members of a client-side protection group; (iii) designating one of the first and second network-side interface as an active network-side interface of the network-side protection group; and (iv) designating one of the first second client-side interface as an active client-side interface of the client-side protection group, such that traffic ingressing on the active network-side interface may egress on the active client-side interface and traffic ingressing on the active client-side interface may egress on the active network-side interface.

Systems and methods for protection of adaptation layer in a communication network

According to one embodiment, a method may include detecting existence of an alarm-triggering event associated with a service at a maintenance level. The method may also include analyzing one or more parameters associated with carrier traffic for the service. The method may additionally include determining whether a data path for carrier traffic associated with the service is operational based on the analysis of the one or more parameters. The method may further include masking or downgrading an alarm triggered by the alarm-triggering event in response to a determination that the data path is operational.

Systems and methods of masking non-service affecting alarms in a communication system

A method of optimizing bandwidth usage in a link aggregated network includes identifying available bandwidth on a plurality of data links in a link aggregation group, selecting the data link with the least available bandwidth, and determining whether the available bandwidth of the selected data link is less than a guaranteed bandwidth of an incoming data flow. If the available bandwidth of the selected data link is less than the guaranteed bandwidth of the incoming data flow, the method includes selecting the data link with the next least available bandwidth and repeating the previous steps until the available bandwidth of the selected data link is greater than the guaranteed bandwidth of the incoming data flow. The method further includes assigning the data flow to the data link determined to have an available bandwidth greater than the guaranteed bandwidth of the incoming data flow.

System and method for optimizing network bandwidth usage

RPR traffic management concepts are extended to individual client flows while adhering to the station level traffic management functions by using a two tiered shaper approach. The first tier manages the client level SLAs and feeds the second tier which provides the aggregate station level traffic management functions. This approach allows sharing of a single RPR station without the compromises and side affects associated with the other techniques. Apparatus for Resilient Packet Ring traffic management comprises a stage queue selection block operable to hold client and control traffic for transmission, a queue level traffic shaper operable to control an add rate of client data add traffic and to provide queue specific send indications to the stage queue selection block, and a ringlet level traffic shaper operable to control traffic flow for a Resilient Packet Ring ringlet and to provide aggregate send indications to the stage queue selection block.

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Montvale, NJ, United States of America

Nitin Gogate