IP Library › Granted Patent US 7,756,016
Granted Patent B2
US 7,756,016 · App. 11/340,063 · Granted Jul 13, 2010

Method and apparatus for efficient link redundancy

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Quick Facts
Patent No.
US 7,756,016
App. No.
11/340,063
Granted
Jul 13, 2010
Kind
B2
Abstract

A method that changes the selection of a 2:1 multiplexer that receives a first output signal from a first framer and a second output signal from a second framer. The first output signal is the same as the second output signal. An apparatus having a framer and a 2:1 multiplexer that receives an inbound signal from the framer. A first multiplexer receives at least one signal from another framer and the 2:1 multiplexer has an input coupled to an output from the first multiplexer. A second multiplexer receives at least one signal from the other framer and the second multiplexer has an output coupled to an input of the framer for an outbound signal.

Claims (25)

1. An ingress and egress channel for a networking system, comprising:

a) a framer to receive an ingress frame and send an egress frame, said framer having separate outputs for separate ingress signals within said ingress frame, said framer having separate inputs for separate egress signals within said egress frame;

b) separate ingress multiplexers for each of said outputs, each ingress multiplexer having a first input coupled to a different one of said outputs;

c) separate egress multiplexers for each of said inputs of said framer, each egress multiplexer having an output coupled to a different one of said inputs of said framer, each egress multiplexer having inputs to receive ingress signals from other ingress and egress channels within said networking system: and,

d) separate additional multiplexers for each second input of said ingress multiplexers, each additional multiplexer having an output coupled to a different ingress multiplexer's second input, each additional multiplexer having inputs to receive additional ingress signals received by said networking system that are the same as said ingress signals.

2. The ingress and egress channel of claim 1 wherein said signals are STS signals.

3. The ingress and egress channel of claim 1 wherein said ingress and egress channel is implemented on a semiconductor chip.

4. The ingress and egress channel of claim 1 wherein said egress multiplexers' inputs are the same as said additional multiplexers' inputs.

5. The ingress and egress channel of claim 1 further comprising a switching/routing engine having inputs coupled to receive said ingress signals from said other ingress or egress channels.

6. The ingress and egress channel of claim 5 wherein said switching/routing engine is an IP switching/routing engine.

7. A networking system, comprising:

a first ingress and egress channel, a second ingress and egress channel and a third egress channel, said first ingress and egress channel having:

a) a framer to receive an ingress frame and send an egress frame, said framer having separate outputs for separate ingress signals within said ingress frame, said framer having separate inputs for separate egress signals within said egress frame;

b) separate ingress multiplexers for each of said outputs, each ingress multiplexer having a first input coupled to a different one of said outputs;

c) separate egress multiplexers for each of said inputs of said framer, each egress multiplexer having an output coupled to a different one of said inputs of said framer, each egress multiplexer having inputs to receive ingress signals from said second ingress and egress channel; and,

d) separate additional multiplexers for each second input of said ingress multiplexers, each additional multiplexer having an output coupled to a different ingress multiplexer's second input, each additional multiplexer having inputs to receive said ingress signals from another frame received by said third ingress and egress channel.

8. The networking system of claim 7 wherein said second and third ingress and egress channels are the same ingress and egress channel.

9. The networking system of claim 7 wherein said second ingress and egress channel comprises:

a) a second framer to receive a second ingress frame and send a second egress frame, said second framer having separate outputs for separate ingress signals within said second ingress frame, said second framer having separate inputs for separate egress signals within said second egress frame;

b) separate second ingress multiplexers for each of said outputs of said second framer, each second ingress multiplexer having a first input coupled to a different one of said second framer outputs;

c) separate second egress multiplexers for each of said inputs of said second framer, each second egress multiplexer having an output coupled to a different one of said inputs of said second framer, each second egress multiplexer having inputs to receive ingress signals from said separate ingress multiplexers.

10. The networking system of claim 9 wherein said networking system is configurable to implement a 1+1 protection scheme.

11. The networking system of claim 9 wherein said networking system is configurable to implement a UPSR protection scheme.

12. The networking system of claim 9 wherein said networking system is configurable to implement a BLSR protection scheme.

13. The networking system of claim 7 wherein said ingress and egress channel further comprises a switching/routing engine having inputs coupled to receive said ingress signals from second ingress and egress channel.

Assignments (17)
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (053546/0001) Recorded Jun 23, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC IP HOLDING COMPANY LLC
Reel/Frame 071642/0001 →
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001) Recorded May 20, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.); DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC); EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.); SCALEIO LLC
Reel/Frame 061753/0001 →
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001) Recorded Apr 26, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.); DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC); EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.); SCALEIO LLC
Reel/Frame 061324/0001 →
RELEASE OF SECURITY INTEREST Recorded Nov 3, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL, L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; WYSE TECHNOLOGY L.L.C.
Reel/Frame 058216/0001 →
MERGER Recorded Mar 4, 2021
From: FORCE10 NETWORKS, INC.
To: DELL MARKETING CORPORATION
Reel/Frame 056104/0988 →
SECURITY AGREEMENT Recorded Apr 22, 2020
From: CREDANT TECHNOLOGIES INC.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; FORCE10 NETWORKS, INC.; WYSE TECHNOLOGY L.L.C.; EMC IP HOLDING COMPANY LLC
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Reel/Frame 053546/0001 →
SECURITY AGREEMENT Recorded Mar 21, 2019
From: CREDANT TECHNOLOGIES, INC.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; FORCE10 NETWORKS, INC.; WYSE TECHNOLOGY L.L.C.; EMC IP HOLDING COMPANY LLC
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Reel/Frame 049452/0223 →
SECURITY AGREEMENT Recorded Sep 21, 2016
From: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; SPANNING CLOUD APPS LLC; WYSE TECHNOLOGY L.L.C.
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 040134/0001 →
SECURITY AGREEMENT Recorded Sep 21, 2016
From: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; SPANNING CLOUD APPS LLC; WYSE TECHNOLOGY L.L.C.
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
Reel/Frame 040136/0001 →
RELEASE OF SECURITY INTEREST Recorded Sep 14, 2016
From: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT
To: DELL MARKETING L.P.; ASAP SOFTWARE EXPRESS, INC.; APPASSURE SOFTWARE, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL INC.; DELL PRODUCTS L.P.; DELL USA L.P.; DELL SOFTWARE INC.; FORCE10 NETWORKS, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040065/0618 →
RELEASE OF SECURITY INTEREST Recorded Sep 14, 2016
From: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
To: DELL MARKETING L.P.; ASAP SOFTWARE EXPRESS, INC.; APPASSURE SOFTWARE, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL INC.; DELL PRODUCTS L.P.; DELL USA L.P.; DELL SOFTWARE INC.; FORCE10 NETWORKS, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040040/0001 →
RELEASE OF SECURITY INTEREST Recorded Sep 13, 2016
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: DELL MARKETING L.P.; ASAP SOFTWARE EXPRESS, INC.; APPASSURE SOFTWARE, INC.; COMPELLANT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL INC.; DELL PRODUCTS L.P.; DELL USA L.P.; DELL SOFTWARE INC.; FORCE10 NETWORKS, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040065/0216 →
PATENT SECURITY AGREEMENT (TERM LOAN) Recorded Jan 2, 2014
From: DELL INC.; APPASSURE SOFTWARE, INC.; ASAP SOFTWARE EXPRESS, INC.; BOOMI, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL USA L.P.; FORCE10 NETWORKS, INC.; GALE TECHNOLOGIES, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 031899/0261 →
PATENT SECURITY AGREEMENT (ABL) Recorded Jan 2, 2014
From: DELL INC.; APPASSURE SOFTWARE, INC.; ASAP SOFTWARE EXPRESS, INC.; BOOMI, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL USA L.P.; FORCE10 NETWORKS, INC.; GALE TECHNOLOGIES, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 031898/0001 →
PATENT SECURITY AGREEMENT (NOTES) Recorded Jan 2, 2014
From: APPASSURE SOFTWARE, INC.; ASAP SOFTWARE EXPRESS, INC.; BOOMI, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL INC.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL USA L.P.; FORCE10 NETWORKS, INC.; GALE TECHNOLOGIES, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
To: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS FIRST LIEN COLLATERAL AGENT
Reel/Frame 031897/0348 →
CHANGE OF NAME Recorded Mar 13, 2013
From: TURIN NETWORKS, INC.
To: FORCE10 NETWORKS, INC.
Reel/Frame 029983/0151 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 5, 2013
From: MAO, JIM
To: TURIN NETWORKS
Reel/Frame 029924/0284 →