IP Library › Granted Patent US 7,636,352
Granted Patent B2
US 7,636,352 · App. 11/508,361 · Granted Dec 22, 2009

Maintaining filtering database consistency

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Quick Facts
Patent No.
US 7,636,352
App. No.
11/508,361
Filed
Aug 22, 2006
Granted
Dec 22, 2009
Kind
B2
Art Unit
2419
USPC
370/428
Abstract

Information is shared between switches such as bridges to facilitate efficient forwarding of data. In some embodiments consistency is maintained between information stored in filtering databases for IEEE 802.1D or 802.1Q bridges. When a switch does not have an entry in a filtering database that matches a destination address in a received frame, the switch may send information with the forwarded frame indicating that the switch had no entry for the destination address. When a switch that has an entry for a given destination address receives a frame along with an indication that the sender did not have an entry or has a different entry for the destination address, the switch may send its information corresponding to the destination address to other switches.

Claims (10)

1. A method of distributing destination information comprising:

receiving, in a first switch in a switch stack, a frame with information regarding a forwarding decision made by a second switch in the switch stack;

retrieving, by the first switch, destination information relating to the received frame; and

wherein the destination information is provided to the second switch when the information regarding the forwarding decision identifies a first destination port for the frame and a different destination port is indicated for the frame by the destination information, and the providing of destination information is done only when the destination information comprises a local front port on the first switch.

2. The method of claim 1 wherein the information regarding the forwarding decision comprises a destination port for the frame.

3. The method of claim 1 wherein the destination information is determined based on the MAC address and virtual LAN identifier of the frame.

4. The method of claim 1 wherein the destination information comprises a destination port for the frame.

5. The method of claim 1 wherein the second switch is identified by an identifier received in conjunction with the frame.

6. The method of claim 5 wherein the forwarding decision comprises an identification of a destination port for the frame.

7. The method of claim 1 wherein the information regarding the forwarding decision is included in a header forwarded with the frame.

Assignments (23)
RELEASE OF SECURITY INTEREST Recorded Mar 14, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 060894/0437 →
RELEASE OF SECURITY INTEREST Recorded Mar 11, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059363/0001 →
RELEASE OF SECURITY INTEREST Recorded Mar 10, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059863/0400 →
RELEASE OF SECURITY INTEREST Recorded Mar 9, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059358/0001 →
RELEASE OF SECURITY INTEREST Recorded Feb 25, 2022
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059333/0222 →
SECURITY INTEREST Recorded Jun 4, 2021
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Reel/Frame 057935/0474 →
SECURITY INTEREST Recorded Dec 24, 2020
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 055671/0612 →
SECURITY INTEREST Recorded Jun 5, 2020
From: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 053468/0705 →
RELEASE OF SECURITY INTEREST Recorded May 30, 2020
From: JPMORGAN CHASE BANK, N.A, AS ADMINISTRATIVE AGENT
To: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 053466/0011 →
SECURITY INTEREST Recorded Apr 24, 2020
From: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 053311/0305 →
SECURITY INTEREST Recorded Sep 18, 2018
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Reel/Frame 047103/0206 →
SECURITY INTEREST Recorded Jun 25, 2018
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 046426/0001 →
RELEASE OF SECURITY INTEREST Recorded May 29, 2018
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: MICROSEMI CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.), INC.; MICROSEMI FREQUENCY AND TIME CORPORATION; MICROSEMI COMMUNICATIONS, INC.; MICROSEMI SOC CORP.; MICROSEMI CORP. - POWER PRODUCTS GROUP; MICROSEMI CORP. - RF INTEGRATED SOLUTIONS
Reel/Frame 046251/0391 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 22, 2017
From: MICROSEMI COMMUNICATIONS, INC.
To: MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 042523/0577 →
PATENT SECURITY AGREEMENT Recorded Feb 3, 2016
From: MICROSEMI CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.) INC. (F/K/A LEGERITY, INC., ZARLINK SEMICONDUCTOR (V.N.) INC., CENTELLAX, INC., AND ZARLINK SEMICONDUCTOR (U.S.) INC.); MICROSEMI FREQUENCY AND TIME CORPORATION (F/K/A SYMMETRICON, INC.); MICROSEMI COMMUNICATIONS, INC. (F/K/A VITESSE SEMICONDUCTOR CORPORATION); MICROSEMI SOC CORP. (F/K/A ACTEL CORPORATION); MICROSEMI CORP. - POWER PRODUCTS GROUP (F/K/A ADVANCED POWER TECHNOLOGY INC.); MICROSEMI CORP. - RF INTEGRATED SOLUTIONS (F/K/A AML COMMUNICATIONS, INC.)
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 037691/0697 →
RELEASE OF SECURITY INTEREST Recorded Jan 19, 2016
From: BANK OF AMERICA, N.A.
To: MICROSEMI CORPORATION; MICROSEMI CORP.-ANALOG MIXED SIGNAL GROUP, A DELAWARE CORPORATION; MICROSEMI SOC CORP., A CALIFORNIA CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.) INC., A DELAWARE CORPORATION; MICROSEMI FREQUENCY AND TIME CORPORATION, A DELAWARE CORPORATION; MICROSEMI COMMUNICATIONS, INC. (F/K/A VITESSE SEMICONDUCTOR CORPORATION), A DELAWARE CORPORATION; MICROSEMI CORP.-MEMORY AND STORAGE SOLUTIONS (F/K/A WHITE ELECTRONIC DESIGNS CORPORATION), AN INDIANA CORPORATION
Reel/Frame 037558/0711 →
MERGER AND CHANGE OF NAME Recorded May 13, 2015
From: VITESSE SEMICONDUCTOR CORPORATION; LLIU100 ACQUISITION CORP.
To: MICROSEMI COMMUNICATIONS, INC.
Reel/Frame 035651/0708 →
SUPPLEMENTAL SECURITY AGREEMENT Recorded Apr 29, 2015
From: MICROSEMI COMMUNICATIONS, INC.
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 035532/0925 →
RELEASE OF SECURITY INTEREST Recorded Apr 28, 2015
From: WHITEBOX VSC, LTD.
To: VITESSE SEMICONDUCTOR CORPORATION
Reel/Frame 035526/0090 →
RELEASE OF SECURITY INTEREST Recorded Nov 5, 2014
From: US BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: VITESSE SEMICONDUCTOR CORPORATION
Reel/Frame 034176/0162 →
SECURITY AGREEMENT Recorded Dec 9, 2009
From: VITESSE SEMICONDUCTOR CORPORATION
To: WHITEBOX VSC, LTD.
Reel/Frame 023627/0079 →
COLLATERAL ASSIGNMENT (INTELLECTUAL PROPERTY) Recorded Nov 5, 2009
From: VITESSE SEMICONDUCTOR CORPORATION
To: U.S. BANK NATIONAL ASSOCIATION
Reel/Frame 023471/0267 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 22, 2006
From: OELGAARD, TORKIL; HOFMAN-BANG, JOERGEN P.R.
To: VITESSE SEMICONDUCTOR CORPORATION
Reel/Frame 018221/0830 →