Geoffrey A Mattson

US Patent:

7864789, Jan 4, 2011

Filed:

Jun 28, 2002

Appl. No.:

10/185101

Inventors:

Michael Tate - Mouans Sartoux, FR
Geoffrey Mattson - Nashua NH, US
Simon Bryden - La Roquette sur Siagne, FR
Robert Pluim - Biot, FR

Assignee:

Ciena Corporation - Linthicum MD

International Classification:

H04L 12/28

US Classification:

370410, 370216

Abstract:

A platform is connected over a synchronous network using a GFP encapsulation scheme to a provider device having a first Ethernet interface with a customer device, said platform being arranged for exchanging tagged frames including a virtual LAN identifier (VID) with a service unit over a second Ethernet interface. If an error condition is detected at a GFP port of the platform, a correspondence is retrieved between said GFP port and a VID and a deregistration message including said VID is forwarded to the service unit. If an error condition is detected at the second Ethernet interface responsive to reception of a deregistration message including a VID from the service unit, a correspondence is retrieved between said VID and a GFP port and said deregistration message is forwarded through said GFP port to the provider device in a GFP error message. When several Ethernet interfaces concentrated by a bridge face the provider device, another VID is taken into account in the correspondence retrieving.

US Patent:

20030108051, Jun 12, 2003

Filed:

Jan 22, 2002

Appl. No.:

10/054208

Inventors:

Simon Bryden - La Roquette Sur Siagne, FR
Michael Tate - Mouans Sartoux, FR
Geoffrey Mattson - Nashua NH, US

International Classification:

H04L012/28
H04L012/56

US Classification:

370/395540, 370/471000

Abstract:

A virtual private network (VPN) service is provided through a shared network infrastructure, with customer edge (CE) devices each having a provider edge (PE) interface having a single layer address in the VPN. An address resolution request message is transmitted by a first CE device on plural layer virtual circuits of its PE interface. The address resolution request message including the layer address allocated to a second CE device of the VPN. In response to reception of such request message at the second CE device, an address resolution response message is returned to the first CE device. In response to reception of this response message, the first CE device maps the layer address allocated to the second CE device to a virtual LAN identifier of the layer virtual circuit on which the response message is received.

US Patent:

20030110287, Jun 12, 2003

Filed:

Jan 22, 2002

Appl. No.:

10/054186

Inventors:

Geoffrey Mattson - Nashua NH, US

International Classification:

G06F015/173

US Classification:

709/238000

Abstract:

A primary label switched path (LSP) defined in a label switching network has a protected portion for transmitting data packets containing a label stack from a first label switching node to a second label switching node, the protected portion including at least one intermediate label switching node between the first and second nodes. To provide path recovery resources in case of link or node failure, it is proposed a method in which a backup LSP is defined from the first node to the second node. A transformation of the label stack of a packet transmitted along the protected portion of the primary LSP from an output of the first node to an input of the second node is determined. The first node is configured to switch a packet to the backup LSP upon detection of a failure in the protected portion of the primary LSP. In addition, a node of the backup LSP is configured to process the label stack of any packet transmitted along the backup LSP so as to apply the determined transformation.