Deborah A Fitzgerald

US Patent:

20090282291, Nov 12, 2009

Filed:

Oct 31, 2008

Appl. No.:

12/262200

Inventors:

Deborah Fitzgerald - Acton MA, US
Piotr Romanus - Andover MA, US
John Osswald - Northbridge MA, US
Srikanth Keesara - Tewksbury MA, US

Assignee:

NORTEL NETWORKS LIMITED - St. Laurent

International Classification:

G06F 11/22

US Classification:

714 39, 714E11152

Abstract:

A network node includes a central processor card and a plurality of line cards. Each line card generates a maintenance association end point (MEP) entity that can respond to connectivity fault management (CFM) frames. The MEP entity on each line card periodically generates and transmits a multicast connectivity check message (CCM) to the other line cards in the network node. The CCM includes a card-information TLV and, optionally, a trunk-status TLV. Card-information TLVs include the slot number and card type of the transmitting line card. Trunk-status TLVs include the trunk state of each trunk supported by the transmitting line card. The line cards of the node consider a given line card to be down when three consecutive CCMs from that line card are missed. In response to recognizing a down line card, the other line cards can initiate an action, such as determine the trunks supported by the down line card and trigger a trunk switchover.

US Patent:

20120063453, Mar 15, 2012

Filed:

Nov 9, 2010

Appl. No.:

12/942282

Inventors:

Srikanth Keesara - Tewksbury MA, US
Christopher Monti - Tyngsboro MA, US
Richard Thomas Strong - Amherst NH, US
Deborah Ellen Fitzgerald - Acton MA, US

Assignee:

AVAYA INC. - Basking Ridge NJ

International Classification:

H04L 12/56

US Classification:

370390

Abstract:

Methods and apparatus provide for a network device(s) employing tree tracer processing of a data packet(s) and/or a response(s) in order to discover and graphically represent all the paths within a hierarchical tree of network devices for multicast traffic flows. Specifically, a first network device receives a data packet. The data packet provides a multicast target MAC address. The first network device forwards the data packet to a plurality of network devices, where each of the plurality of the network devices belong to a multicast group identified according to the multicast target MAC address. Based on receipt of the data packet, the first network device generates and transmits a first response to a source of the data packet. The first response indicates a placement of the first network device with respect to a hierarchical tree of the plurality of network devices belonging to the multicast group.

US Patent:

20120113817, May 10, 2012

Filed:

Oct 12, 2011

Appl. No.:

13/271421

Inventors:

Deborah E. Fitzgerald - Acton MA, US
Srikanth Keesara - Tewksbury MA, US

Assignee:

Avaya Inc. - Basking Ridge NJ

International Classification:

H04L 12/26

US Classification:

370248

Abstract:

A Shortest Path Bridging (SPB) network provides a multicast traceroute using network identifiers such as IP addresses for the source and destination (multicast group). The network identifiers, which are based on layer 3 (IP) designations of the traced multicast group, are mapped to a network identifier of the multicast group (corresponding to a layer 2, or MAC address) and an associated Virtual Local Area Network (VLAN) which is used to transport the packets belonging to the multicast flow. Therefore, an operator issuing the traceroute command need not be familiar with the layer 2 concepts of the network, but rather need only supply the layer 3 (IP address) designations of the concerned entities.15

US Patent:

20130077624, Mar 28, 2013

Filed:

Sep 23, 2011

Appl. No.:

13/241869

Inventors:

Srikanth Keesara - Tewksbury MA, US
Richard T. Strong - Amherst NH, US
Deborah E. Fitzgerald - Acton MA, US

Assignee:

Avaya Inc. - Basking Ridge NJ

International Classification:

H04L 12/56

US Classification:

370390

Abstract:

Techniques disclosed herein include systems and methods for improving multicast traffic operations in a Shortest Path Bridging (SPB) network by conveying bridging domain information of an incoming interface (IIF) when transporting multicast traffic over the SPB network. Techniques disclosed herein include modifying encapsulation packet header information of existing Mac-In-Mac fields to convey additional information that can be interpreted at edge nodes by modifying edge node interpretation of multicast data. Specifically, the value of the I-SID in the BMAC-DA field can be set to be different from the I-SID value in the I-TAG field. Carrying the L2 VSN I-SID value in the I-TAG allows the Egress BEBs to determine which VLAN/L2 VSN/Bridging-Domain of the IIF is in use, and then modify or preserve underlying header information accordingly.

US Patent:

20130128751, May 23, 2013

Filed:

Nov 23, 2011

Appl. No.:

13/303615

Inventors:

Srikanth Keesara - Tewksbury MA, US
David E. Frattura - Boston MA, US
Deborah E. Fitzgerald - Acton MA, US
Christopher Monti - Tyngsboro MA, US

Assignee:

AVAYA INC. - Basking Ridge NJ

International Classification:

H04L 12/26

US Classification:

370248

Abstract:

A network management and monitoring application employs diagnostic messages for confirming network path connectivity and identifying and locating connectivity faults. Diagnostic messages similar to conventional “ping” and “traceroute” messages traverse the network along a prescribed path for which diagnostic feedback is desired. The application receives and analyzes return messages sent from network entities along the path to ascertain connectivity issues on the path. The application receives layer 3 identifiers such as IP addresses, however performs diagnostic operations such as continuity checks based on layer 2 identifiers such as MAC (Media Access Control) identifiers because certain network entities operate on L2 identifiers and would otherwise evade a continuity check based on layer 3 identifiers. The monitoring application therefore performs continuity diagnostics such as ping and traceroute operations using L2 identifiers, therefore pinpointing problems with an L2 network forwarding entity such as a bridge that lies between L3 entities such as routers.

US Patent:

20170289944, Oct 5, 2017

Filed:

Apr 3, 2017

Appl. No.:

15/478175

Inventors:

- Santa Clara CA, US
Deborah Fitzgerald - Acton MA, US
Carl Keene - Groveland MA, US
Srikanth Keesara - Tewksbury MA, US

Assignee:

Avaya Inc. - Santa Clara CA

International Classification:

H04W 60/04
H04W 48/16
H04L 12/733

Abstract:

Methods, systems and computer readable media for zero touch attachment of devices, such as Internet of Things (IoT) devices, to an SPB network are described.

US Patent:

20160373318, Dec 22, 2016

Filed:

Jun 19, 2015

Appl. No.:

14/744294

Inventors:

- Basking Ridge NJ, US
Deborah Ellen Fitzgerald - Acton MA, US

Assignee:

AVAYA INC. - Basking Ridge NJ

International Classification:

H04L 12/24
H04L 29/08
H04L 29/06

Abstract:

A computer-implemented method, apparatus and software for debugging auto-attach entities is presented. A Continuity Fault Management (CFM) request for a service is received over a network at an Auto-Attach (AA) server. The AA server responds with a first response regarding the AA server on the service. The AA server also responds to the CFM request with a second response regarding any AA clients and any AA proxies on the service.

US Patent:

20140369177, Dec 18, 2014

Filed:

Jun 12, 2013

Appl. No.:

13/916257

Inventors:

- Basking Ridge NJ, US
Deborah Ellen Fitzgerald - Acton MA, US

International Classification:

H04L 12/24

US Classification:

370216

Abstract:

Multicast link trace Connectivity Fault Management (CFM) is implemented in an Ethernet network by causing nodes on the network which perform Reverse Path Forwarding Check (RPFC) based on packet Source Address (SA) to not update the packet SA when updating the content of the CFM message. Alternatively multicast CFM is implemented by causing nodes on the network to update the packet SA when the content of the CFM message is updated, but cause a secondary RPFC process to be implemented by a control process in connection with processing the CFM message. The secondary RPFC process is based on a combination of source and content contained in the payload of the CFM message.