Paul J Quinn

US Patent:

7409712, Aug 5, 2008

Filed:

Jul 16, 2003

Appl. No.:

10/620981

Inventors:

Roy M. Brooks - New Hill NC, US
John E. Cavanaugh - Raleigh NC, US
Paul M. Quinn - Brookline MA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 11/00

US Classification:

726 22, 726 11, 726 13, 726 14, 726 15, 726 23, 726 24, 726 25, 726 26, 713188

Abstract:

Conventional methods of addressing a Distributed Denial of Service attack include taking the target node offline, and routing all traffic to an alternate countermeasure, or “sinkhole” router, therefore requiring substantial lag time to reconfigure the target router into the network. In a network, a system operator monitors a network for undesirable message traffic. Upon a notification of such undesirable message traffic, traffic is rerouted to a filter complex to separate undesirable traffic. The filter complex establishes an alternate route using a second communications protocol, and uses the alternate route to redirect the desirable message traffic to the target node. The use of the second protocol avoids conflict between the redirected desirable traffic and the original, or first, protocol which now performs the reroute. In this manner, the filter complex employs a second alternate communications protocol to reroute and redirect desirable message traffic to the target node while diverting undesirable message traffic, and therefore avoids widespread routing configuration changes by limiting the propagation breadth of the second protocol.

US Patent:

7860100, Dec 28, 2010

Filed:

Oct 1, 2008

Appl. No.:

12/243491

Inventors:

Mohamed Khalid - Cary NC, US
Paul Quinn - San Francisco CA, US
Kenneth Durazzo - San Ramon CA, US
Richard Manfred Pruss - Tewantin, AU

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370392, 370229

Abstract:

A service chain system is provided. The system includes a packet of data that is operable to pass through a network of service nodes as defined by a service chain; and a service classification device that is operable to change the service chain based on a system performance.

US Patent:

7895425, Feb 22, 2011

Filed:

Aug 3, 2007

Appl. No.:

11/833479

Inventors:

Mohamed Khalid - Cary NC, US
Paul Quinn - San Francisco CA, US
Kenneth Durazzo - San Ramon CA, US
Robert Gleichauf - San Antonio TX, US
Richard M. Pruss - Tewantin, AU

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 9/00

US Classification:

713 1, 709226

Abstract:

In one embodiment, a method can include: selecting an operation, administration, and maintenance (OAM) type for a destination, where the destination is enabled for a service insertion architecture (SIA); encapsulating an OAM packet with the OAM type indicated in a service header therein; and sending the OAM packet to the destination.

US Patent:

8429400, Apr 23, 2013

Filed:

Jun 21, 2007

Appl. No.:

11/766309

Inventors:

Mohamed Khalid - Cary NC, US
Warren S. Wainner - Potomac Falls VA, US
Aamer Akhter - Cary NC, US
Paul Quinn - San Francisco CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 29/06

US Classification:

713163, 713153, 380285, 380286, 707713, 707759

Abstract:

In one embodiment, a method can include: (i) sending a request to join a group to a service broker; (ii) receiving from the service broker a list of key servers servicing the group; and (iii) sending registration information to a selected one of the key servers in the list.

US Patent:

20190288923, Sep 19, 2019

Filed:

Apr 15, 2019

Appl. No.:

16/383956

Inventors:

- San Jose CA, US
Carlos M. Pignataro - Raleigh NC, US
Nagendra Kumar Nainar - Morrisville NC, US
Paul Quinn - Wellesley MA, US
James Guichard - New Boston NH, US

International Classification:

H04L 12/24

Abstract:

In one embodiment, a system and method are disclosed for sending a request and receiving a reply. The request contains a network service header including a flow label field and a target index field. The flow label field contains a set of available flow labels. The target index field includes a value indicating a target node. The reply contains information indicating which of the flow labels can be used to route a packet to each of the next hop nodes downstream from the device that sent the reply. This process can be repeated for other nodes on a path, and other paths in a service topology layer. The information determined by this process can be used to perform other necessary functionalities at the service topology layer.

US Patent:

20190158398, May 23, 2019

Filed:

Jan 18, 2019

Appl. No.:

16/252036

Inventors:

- San Jose CA, US
Carlos M. Pignataro - Cary NC, US
James N. Guichard - New Boston NH, US
Paul Quinn - Wellesley MA, US

International Classification:

H04L 12/715
H04L 12/46

Abstract:

An apparatus having logic elements to receive an incoming packet associated with a first service function chain; identify a next hop service function for the incoming packet as a non-reactive service function; create a duplicate packet; forward the duplicate packet to the non-reactive service function; and forward the incoming packet to a next reactive service function. An apparatus having logic to receive an incoming packet associated with a first service function chain (SFC), having a first service path identifier (SPI); determine that the incoming packet has a first service index (SI), and that a next-hop SI identifies a non-reactive service function (NRSF); receive a duplicate packet of the incoming packet; rewrite a service header of the duplicate packet to identify a second SFC having a second SPI; and alter the first SI of the incoming packet to identify a next reactive service function in the first SFC.

US Patent:

20190068490, Feb 28, 2019

Filed:

Oct 25, 2018

Appl. No.:

16/170175

Inventors:

- San Jose CA, US
Carlos M. Pignataro - Raleigh NC, US
Paul Quinn - Wellesley MA, US
Hung The Chau - Highland CA, US
Vivek Kansal - San Jose CA, US
Jianxin Wang - Saratoga CA, US
Kent K. Leung - Palo Alto CA, US

International Classification:

H04L 12/721
H04L 12/801
H04L 12/703
H04L 12/911
H04L 12/715
H04L 12/851

Abstract:

Embodiments are directed to receiving an original packet at a service function; determining, for a reverse packet, a reverse service path identifier for a previous hop on a service function chain; determining, for the reverse packet, a service index for the reverse service path identifier; and transmitting the reverse packet to the previous hop on the service function chain.

US Patent:

20180013638, Jan 11, 2018

Filed:

Sep 21, 2017

Appl. No.:

15/711625

Inventors:

- San Jose CA, US
Carlos M. Pignataro - Raleigh NC, US
David Ward - Los Gatos CA, US
Paul Quinn - San Francisco CA, US
Surendra Kumar - San Ramon CA, US

International Classification:

H04L 12/24
H04L 12/26
H04L 12/703
H04L 29/08
H04L 12/723

Abstract:

Presented herein are techniques performed in a network comprising a plurality of network nodes each configured to apply one or more service functions to traffic that passes the respective network nodes in a service path. At a network node, an indication is received of a failure or degradation of one or more service functions or applications applied to traffic at the network node. Data descriptive of the failure or degradation is generated. A previous service hop network node at which a service function or application was applied to traffic in the service path is determined. The data descriptive of the failure or degradation is communicated to the previous service hop network node.