公开(公告)号：US10757040B2

公开(公告)日：2020-08-25

申请号：US15646800

申请日：2017-07-11

Applicant: Cisco Technology, Inc.

Inventor： Karthik Subramani ,  Venu Gopal Tummala ,  Kishan Kumar Kotari Uppunda

IPC: H04L12/931 ,  H04L12/24 ,  G06F3/06 ,  H04L29/06 ,  H04L12/947 ,  H04L12/751 ,  H04L12/28 ,  H04L29/08 ,  G06F16/23

Abstract: Provided are techniques for the efficient distribution of peer zone databases in a FC Fabric. In an example, a switch instantiates a peer zone definition defining a peer zone in which two or more initiator host devices are each permitted to communicate with one or more target storage devices via the switched FC fabric and the two or more initiator host devices are prevented from communicating with each other. The switch stores the peer zone definition in a peer zone database at the FC switch, and distributes the peer zone definition to other FC switches of the switched FC fabric without performing a Fabric lock operation.

公开(公告)号：US10594599B2

公开(公告)日：2020-03-17

申请号：US15248071

申请日：2016-08-26

Applicant: Cisco Technology, Inc.

Inventor： Kishan Kumar Kotari Uppunda ,  Karthik Subramani ,  Venu Gopal Tummala ,  Jayaprakash Nallapalingu ,  Sumanth Sindiri ,  Malipedy Vijaya Kumar

IPC: H04L12/703 ,  H04L12/707 ,  H04L12/931

Abstract: Presented herein are priority route based techniques for mitigation of slow drain devices in a Fibre Channel (FC) fabric comprising a plurality of FC switches. In accordance with examples presented herein, a first FC switch in a FC fabric receives an indication that a first computing device attached to the FC fabric has entered a slow drain condition. The first FC switch is configured to prepare and install a priority route for packet flows directed to the first computing device.

公开(公告)号：US20180063004A1

公开(公告)日：2018-03-01

申请号：US15248071

申请日：2016-08-26

Applicant: Cisco Technology, Inc.

Inventor： Kishan Kumar Kotari Uppunda ,  Karthik Subramani ,  Venu Gopal Tummala ,  Jayaprakash Nallapalingu ,  Sumanth Sindiri ,  Malipedy Vijaya Kumar

IPC: H04L12/851 ,  H04L12/931

Abstract: Presented herein are priority route based techniques for mitigation of slow drain devices in a Fibre Channel (FC) fabric comprising a plurality of FC switches. In accordance with examples presented herein, a first FC switch in a FC fabric receives an indication that a first computing device attached to the FC fabric has entered a slow drain condition. The first FC switch is configured to prepare and install a priority route for packet flows directed to the first computing device.

公开(公告)号：US11381524B2

公开(公告)日：2022-07-05

申请号：US16931730

申请日：2020-07-17

Applicant: Cisco Technology, Inc.

Inventor： Karthik Subramani ,  Venu Gopal Tummala ,  Kishan Kumar Kotari Uppunda

IPC: H04L49/356 ,  H04L12/28 ,  H04L41/0813 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/02 ,  H04L49/25 ,  H04L9/40 ,  H04L41/0803 ,  H04L67/1097 ,  G06F3/06 ,  G06F16/23

Abstract: Provided are techniques for the efficient distribution of peer zone databases in a FC Fabric. In an example, a switch instantiates a peer zone definition defining a peer zone in which two or more initiator host devices are each permitted to communicate with one or more target storage devices via the switched FC fabric and the two or more initiator host devices are prevented from communicating with each other. The switch stores the peer zone definition in a peer zone database at the FC switch, and distributes the peer zone definition to other FC switches of the switched FC fabric without performing a Fabric lock operation.

公开(公告)号：US20200351221A1

公开(公告)日：2020-11-05

申请号：US16931730

申请日：2020-07-17

Applicant: Cisco Technology, Inc.

Inventor： Karthik Subramani ,  Venu Gopal Tummala ,  Kishan Kumar Kotari Uppunda

IPC: H04L12/931 ,  H04L12/947 ,  H04L12/751 ,  H04L12/28 ,  H04L12/24 ,  G06F3/06 ,  H04L29/06

Abstract: Provided are techniques for the efficient distribution of peer zone databases in a FC Fabric. In an example, a switch instantiates a peer zone definition defining a peer zone in which two or more initiator host devices are each permitted to communicate with one or more target storage devices via the switched FC fabric and the two or more initiator host devices are prevented from communicating with each other. The switch stores the peer zone definition in a peer zone database at the FC switch, and distributes the peer zone definition to other FC switches of the switched FC fabric without performing a Fabric lock operation.

公开(公告)号：US20190020603A1

公开(公告)日：2019-01-17

申请号：US15646800

申请日：2017-07-11

Applicant: Cisco Technology, Inc.

Inventor： Karthik Subramani ,  Venu Gopal Tummala ,  Kishan Kumar Kotari Uppunda

IPC: H04L12/931 ,  H04L12/947 ,  H04L12/751 ,  H04L12/28

Abstract: Provided are techniques for the efficient distribution of peer zone databases in a FC Fabric. In an example, a switch instantiates a peer zone definition defining a peer zone in which two or more initiator host devices are each permitted to communicate with one or more target storage devices via the switched FC fabric and the two or more initiator host devices are prevented from communicating with each other. The switch stores the peer zone definition in a peer zone database at the FC switch, and distributes the peer zone definition to other FC switches of the switched FC fabric without performing a Fabric lock operation.

公开(公告)号：US11431715B2

公开(公告)日：2022-08-30

申请号：US16529261

申请日：2019-08-01

Applicant: Cisco Technology, Inc.

Inventor： Venu Gopal Tummala ,  Sunil John Varghese ,  Pramod Menon

IPC: H04L29/06 ,  H04L9/40 ,  H04L49/356 ,  H04L67/1097 ,  H04B10/25 ,  H04L45/02 ,  H04L49/25

Abstract: A method includes receiving a FLOGI message sent by a device seeking to log on to a network, wherein the device is in a same zone as reachable devices already logged into the network; in response to the FLOGI message, sending to the device a FC_ID, receiving from the device a query, including the FC_ID, for a list of devices with which the device can communicate, in response to the query, sending to the device an empty list of reachable devices with which the device can communicate within the same zone; after sending the empty list, programming, at least, an access control list (ACL) including information about the device; and after the ACL is programmed, triggering a RSCN message to be sent to the device to cause the device to, for the first time, obtain information about the reachable devices.

公开(公告)号：US11297009B2

公开(公告)日：2022-04-05

申请号：US16839486

申请日：2020-04-03

Applicant: Cisco Technology, Inc.

Inventor： Venu Gopal Tummala ,  Harsha Bharadwaj ,  Sunil John Varghese ,  Pramod Menon

IPC: H04L12/931 ,  H04L12/751 ,  H04L29/06 ,  G06F13/42 ,  H04L29/08 ,  H04L49/356 ,  H04L49/506 ,  H04L45/02 ,  H04L67/1097

Abstract: An initiator emulator is implemented on a control plane of a switch fabric connected to target ports of a storage array having storage configured with logical partitions. After an initiator port of a server logs into the switch fabric and is blocked from discovering the target ports, the initiator emulator, acting as proxy for the initiator port, discovers information that indicates logical partition masking enforced at the target ports for the initiator port. The initiator emulator determines allowed (initiator (I), target (T)) (I, T) port combinations that should be allowed access via the switch fabric based on the information from the discovery. The initiator emulator configures the switch fabric with one or more zones based on the allowed (I, T) port combinations. The initiator emulator then sends to the initiator port an indication of a zone change to the switch fabric.

公开(公告)号：US20210314279A1

公开(公告)日：2021-10-07

申请号：US16839486

申请日：2020-04-03

Applicant: Cisco Technology, Inc.

Inventor： Venu Gopal Tummala ,  Harsha Bharadwaj ,  Sunil John Varghese ,  Pramod Menon

IPC: H04L12/931 ,  H04L12/751 ,  H04L29/08 ,  H04L29/06 ,  G06F13/42

Abstract: An initiator emulator is implemented on a control plane of a switch fabric connected to target ports of a storage array having storage configured with logical partitions. After an initiator port of a server logs into the switch fabric and is blocked from discovering the target ports, the initiator emulator, acting as proxy for the initiator port, discovers information that indicates logical partition masking enforced at the target ports for the initiator port. The initiator emulator determines allowed (initiator (I), target (T)) (I, T) port combinations that should be allowed access via the switch fabric based on the information from the discovery. The initiator emulator configures the switch fabric with one or more zones based on the allowed (I, T) port combinations. The initiator emulator then sends to the initiator port an indication of a zone change to the switch fabric.

公开(公告)号：US20210037017A1

公开(公告)日：2021-02-04

申请号：US16529261

申请日：2019-08-01

Applicant: Cisco Technology, Inc.

Inventor： Venu Gopal Tummala ,  Sunil John Varghese ,  Pramod Menon

IPC: H04L29/06 ,  H04B10/25 ,  H04L29/08 ,  H04L12/931

Abstract: A method includes receiving a FLOGI message sent by a device seeking to log on to a network, wherein the device is in a same zone as reachable devices already logged into the network; in response to the FLOGI message, sending to the device a FC_ID, receiving from the device a query, including the FC_ID, for a list of devices with which the device can communicate, in response to the query, sending to the device an empty list of reachable devices with which the device can communicate within the same zone; after sending the empty list, programming, at least, an access control list (ACL) including information about the device; and after the ACL is programmed, triggering a RSCN message to be sent to the device to cause the device to, for the first time, obtain information about the reachable devices.