Mark W Libby

Address:

3064 S Woodrow St, Arlington, VA 22206

Phone:

5713125805

VIN:

JTDBT923371055638

Make:

TOYOTA

Model:

YARIS

Year:

2007

US Patent:

8295278, Oct 23, 2012

Filed:

Dec 18, 2007

Appl. No.:

11/958656

Inventors:

Himanshu Shah - Hopkinton MA, US
Mark Libby - Groton MA, US
David Parks - Chelmsford MA, US

Assignee:

Ciena Corporation - Hanover MD

International Classification:

H04L 12/28

US Classification:

370389, 370409, 3703955, 370392

Abstract:

The present invention provides systems and methods which create an infrastructure/transport Pseudowire (PW) a priori between two Provider Edge (PE) devices. Accordingly, other PWs can be mapped to this transport PW. In an exemplary application, the transport PW (which is a MS-PW by itself) can start and end between two Switching Provider Edge (S-PE) devices and span across multiple S-PEs in between. In another exemplary application, the transport PW terminates between two Terminating Provider Edge (T-PE) devices spanning across all S-PEs in between. In a further exemplary application, the transport PW can start at a S-PE or T-PE and terminate at a T-PE or S-PE, respectively. The placement of the endpoints of the transport PW (on two PEs) determines the number of intervening S-PEs that benefit from this application.

US Patent:

20180352036, Dec 6, 2018

Filed:

May 31, 2018

Appl. No.:

15/994224

Inventors:

- Acton MA, US
Vinay M. CHERIAN - Westford MA, US
Mark LIBBY - Groton MA, US
Nan LUO - Shrewsbury MA, US

International Classification:

H04L 29/08

Abstract:

Embodiments disclosed herein relate to systems and methods for separately managing control and data plan contexts for a secure connection during a standby node switchover scenario. Primary and standby nodes for a secure connection can both maintain a data plane context for a secure connection such as IPSec. In the event that the primary node becomes inactive, the standby node can immediately begin processing data plane traffic using the data plane context for the secure connection maintained at the standby node. Control plane information necessary for programming and activating a control plane context can be stored until needed. During a switchover, the standby node can retrieve the control plane information and activate the control plane context after it has begun processing the data plane traffic.