Paul M Quinn

US Patent:

20190327165, Oct 24, 2019

Filed:

Jul 1, 2019

Appl. No.:

16/458699

Inventors:

- San Jose CA, US
Paul Quinn - Wellesley MA, US
Carlos M. Pignataro - Raleigh NC, US

Assignee:

CISCO TECHNOLOGY, INC. - San Jose CA

International Classification:

H04L 12/26

Abstract:

In one embodiment, a method includes receiving a trace request packet at a service node on a service chain, the trace request packet comprising a service index limit that remains constant for use in identifying at least one service node in the service chain to generate a trace report packet, and processing the trace request packet and determining whether to forward the trace request packet on the service chain or to generate the trace report packet based on a comparison of a service index to the service index limit in the trace request packet, wherein the trace report packet includes service function information of a plurality of service functions in the service chain, and the trace request packet is forwarded on the service chain according to a service path identifier and the service index.

US Patent:

20180131590, May 10, 2018

Filed:

Jan 11, 2018

Appl. No.:

15/868779

Inventors:

- San Jose CA, US
Paul Quinn - Wellesley MA, US
Carlos M. Pignataro - Raleigh NC, US

Assignee:

CISCO TECHNOLOGY, INC. - San Jose CA

International Classification:

H04L 12/26
H04L 29/12

Abstract:

In one embodiment, a method includes receiving a trace request packet at a service node in a service chain, the trace request packet comprising a service path identifier, a service index, and a service index limit, processing the trace request packet at the service node, comparing the service index to the service index limit, determining that the service index is greater than the service index limit, generating a trace response packet at the service node indicating that the service index is greater than the service index limit, and transmitting the trace response packet. The trace response packet comprises service function information for each of a plurality of service nodes in the service chain. An apparatus is also disclosed herein.

US Patent:

20170244631, Aug 24, 2017

Filed:

Feb 22, 2016

Appl. No.:

15/049521

Inventors:

- San Jose CA, US
Paul Quinn - Wellesley MA, US
Carlos M. Pignataro - Raleigh NC, US
Nagendra Kumar Nainar - Morrisville NC, US
Rajiv Asati - Morrisville NC, US

International Classification:

H04L 12/723
H04L 12/741

Abstract:

In one embodiment, a device in a network receives a packet that includes one or more forwarding labels and a service function chaining (SFC) header. The device removes the one or more forwarding labels from the packet. The device inserts an indication of the one or more forwarding labels into metadata of the SFC header. The device forwards the packet with the inserted indication of the one or more forwarding labels to a service function.

US Patent:

20170180257, Jun 22, 2017

Filed:

Mar 4, 2017

Appl. No.:

15/449940

Inventors:

- San Jose CA, US
Paul Quinn - Wellesley MA, US
David D. Ward - Los Gatos CA, US
Carlos M. Pignataro - Raleigh NC, US

Assignee:

CISCO TECHNOLOGY, INC. - San Jose CA

International Classification:

H04L 12/803
H04L 29/08
H04L 29/06

Abstract:

A method for load balancing based on metadata in a network service header. The method includes receiving a packet or frame of a traffic flow, wherein the packet or frame has a payload and the network service header including metadata and service path information for the traffic flow identifying the service path, and the metadata comprises classification information of the packet or frame, extracting, by a service header processor of the load balancer, the classification information of the metadata from the packet or frame, and applying, by a load balancing function of the load balancer, a load balancing policy on the packet or frame based on the classification information of the metadata.

US Patent:

20160337235, Nov 17, 2016

Filed:

Sep 30, 2015

Appl. No.:

14/870722

Inventors:

- San Jose CA, US
Paul QUINN - Wellesley MA, US
Javed ASGHAR - Dublin CA, US
Reinaldo PENNO - San Ramon CA, US
Yixing RUAN - San Jose CA, US
Carlos M. PIGNATARO - Raleigh NC, US

International Classification:

H04L 12/741
H04L 12/851

Abstract:

A method for applying network services to data traffic forwarded between virtual private network (VPN) sites includes: receiving a data packet addressed to a target site associated with the VPN, determining services to be applied to the data packet according to a service chain, where the determining is a function of at least one of the VPN, the origin site or the target site, adding an indication of a VPN forwarding context onto the data packet, encapsulating the data packet with Network Service Header encapsulation, where a header for the encapsulated data packet indicates at least the service chain; forwarding the encapsulated data packet in accordance with the service chain, receiving the encapsulated data packet at the end of the service chain, terminating the service chain, removing the encapsulation, and forwarding the data packet to a target destination per the indication of a VPN forwarding context.

US Patent:

20160173373, Jun 16, 2016

Filed:

Mar 20, 2015

Appl. No.:

14/664629

Inventors:

- San Jose CA, US
Paul Quinn - Wellesley MA, US
David D. Ward - Los Gatos CA, US
Carlos M. Pignataro - Raleigh NC, US

Assignee:

CISCO TECHNOLOGY, INC. - San Jose CA

International Classification:

H04L 12/741
H04L 29/06
H04W 72/04

Abstract:

A method for load balancing based on metadata in a network service header. The method includes receiving a packet or frame of a traffic flow, wherein the packet or frame has a payload and the network service header including metadata and service path information for the traffic flow identifying the service path, and the metadata comprises classification information of the packet or frame, extracting, by a service header processor of the load balancer, the classification information of the metadata from the packet or frame, and applying, by a load balancing function of the load balancer, a load balancing policy on the packet or frame based on the classification information of the metadata.

US Patent:

20160119226, Apr 28, 2016

Filed:

Oct 24, 2014

Appl. No.:

14/522974

Inventors:

- San Jose CA, US
Paul Quinn - Wellesley MA, US
Carlos M. Pignataro - Raleigh NC, US

International Classification:

H04L 12/725
H04L 29/06

Abstract:

A controller that is in communication with the plurality of network nodes establishes a service path for a service chain defined by an ordered sequence of service functions to be performed at respective ones of one or more of the plurality of network nodes. The controller assigns a predetermined service path identifier and a predetermined service index value for a segment of the service chain that includes only one or more network nodes not capable of decapsulating packets to extract a network service header so as to designate the one or more network nodes determined not capable of decapsulating packets to extract the network service header as a single service hop segment in the service chain.

US Patent:

20160014016, Jan 14, 2016

Filed:

Aug 1, 2014

Appl. No.:

14/449601

Inventors:

- San Jose CA, US
Paul Quinn - Wellesley MA, US

International Classification:

H04L 12/715
H04L 12/911

Abstract:

Techniques are presented to enable the instantiation of a service chain that is comprised of service functions belonging to one or more administrative domains. A service chain consisting of one or more service functions in one administrative domain is made available to another administrative domain through an advertisement. This enables the building of inter-domain service chains without the need to share between the administrative domains details about the service chains and service functions in the respective administrative domains.