US 2017/0310538 A1Published application

Ethernet fabric protection in a disaggregated otn switching system

AssigneeFujitsu Limited

InventorsBiaodong Cai, Richard Dunsmore, Rod Naphan, Sam Lisle, Deepak Patel, Iqbal Syed

Life of this patent

Estimating the term…

Loading patent…

Abstract

Methods and systems for Ethernet fabric protection in a disaggregated OTN switching system that include PIU modules each having multiple ports for OTN to Ethernet transceiving and an Ethernet fabric as a switching core are disclosed. An OTN over Ethernet module in each of the PIU modules may enable various OTN functionality to be realized using the Ethernet fabric which may include multiple Ethernet switches. A first PIU module may detect a fault condition on an Ethernet fabric plane of the Ethernet fabric. In response to the detection, the OTN switching system may transmit the fault condition to other PIU modules to redirect optical data unit traffic away from the fault on the Ethernet fabric plane.

Claims20

Dependent claims

A method for Ethernet fabric protection,

in an optical transport network (OTN) switch comprising:
an Ethernet fabric having a number M of Ethernet fabric planes, each of the M Ethernet fabric planes includes a corresponding Ethernet switch of M Ethernet switches;
and
a plurality of plug-in universal (PIU) modules each having M PIU ports including a first PIU module, wherein an ith PIU port of each of the plurality of PIU modules is connected to the ith Ethernet switch of the ith Ethernet fabric plane of the Ethernet fabric, the method comprising:
assigning a variable i having a value ranging from 1 to M to denote the ith Ethernet fabric plane of the M Ethernet fabric planes, the ith Ethernet switch of the M Ethernet switches, and the ith PIU port of the M PIU ports, wherein M is greater than one;
detecting, by the first PIU module, a fault condition associated with the ith PIU port of the first PIU module on the ith Ethernet fabric plane;
and
transmitting the fault condition to stop transmission of optical data unit (ODU) traffic from the plurality of PIU modules to the ith PIU port of the first PIU module.

5 more elements

An OTN switch comprising:

an Ethernet fabric having a number M of Ethernet fabric planes, each of the M Ethernet fabric planes includes a corresponding Ethernet switch of M Ethernet switches;
a plurality of PIU modules each having M PIU ports including a first PIU module, wherein an ith PIU port of each of the plurality of PIU modules is connected to the ith Ethernet switch of the ith Ethernet fabric plane of the Ethernet fabric, and wherein a variable i having a value ranging from 1 to M to denote the ith Ethernet fabric plane of the M Ethernet fabric planes, the ith Ethernet switch of the M Ethernet switches, and the ith PIU port of the M PIU ports, wherein M is greater than one,
the first PIU module to detect a fault condition associated with the ith PIU port of the first PIU module on the ith Ethernet fabric plane;
and
the OTN switch to transmit the fault condition to stop transmission of ODU traffic from the plurality of PIU modules to the ith PIU port of the first PIU module.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/419,649Filed 30 Jan 2017
Priority: 21 Apr 2016
Published: 26 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification25 codes

H04L 12/413
With decentralised control: with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
H04B 10/032
Arrangements for fault recovery: using working and protection systems
H04J 3/1652
Fixed allocated frame structures: optical Transport Network [OTN]
H04L 12/40
Characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]: bus networks