Anupam C Chanda

US Patent:

8214522, Jul 3, 2012

Filed:

May 7, 2009

Appl. No.:

12/437405

Inventors:

Anupam Chanda - Cupertino CA, US

Assignee:

VMware, Inc. - Palo Alto CA

International Classification:

G06F 15/16

US Classification:

709236, 709245, 709230, 709238, 709239

Abstract:

A method for sharing a network connection between a host system and a virtual machine is disclosed. The method includes sending an outgoing data frame from the virtual machine to a computer network. The host system is enabled to use the network connection using a first layer 2 address and a first layer 3 address. The first layer 2 and the first layer 3 addresses are associated with the network connection. The virtual machine is enabled to attempt to use the network connection using a second layer 2 address and a second layer 3 address. The first layer 3 and the second layer 3 addresses are compliant with IPv6. An occurrence of the second layer 2 address is replaced within the outgoing data frame with the first layer 2 address. If the outgoing data frame includes a network discover protocol (NDP) message of a selected type, the second layer 2 address in the NDP message is replaced by the first layer 2 address.

US Patent:

8281318, Oct 2, 2012

Filed:

Jul 2, 2008

Appl. No.:

12/167141

Inventors:

Anupam Chanda - Cupertino CA, US
Kevin Scott Christopher - Palo Alto CA, US
Jeremy Sugerman - Palo Alto CA, US
Petr Vandrovec - Mountain View CA, US
Gustav Seth Wibling - Aarthus, DK

Assignee:

VMware, Inc. - Palo Alto CA

International Classification:

G06F 3/00

US Classification:

719314, 719331

Abstract:

A method of data communication between a first virtual machine and a second virtual machine is disclosed. The second virtual machine is executing in a record/replay mode. Data from the first virtual machine is copied to a first queue. The first queue receives the data from the first virtual machine. The first queue has a header section and a data section, wherein the header section being write protected and stores a tail pointer of the data in the first queue. The tail pointer is updated in the header section. This update of the tail pointer causes a page fault, which is handled-through a page fault handler. The handling includes copying the data from the first queue to a second queue. The second queue being configured to receive a copy of the data and to allow the second virtual machine to access the copy of the data.

US Patent:

20120250569, Oct 4, 2012

Filed:

Jun 15, 2012

Appl. No.:

13/524904

Inventors:

Anupam Chanda - San Jose CA, US

Assignee:

VMWARE, INC. - Palo Alto CA

International Classification:

H04L 12/26

US Classification:

370252

Abstract:

A method for sharing a network connection between a host system and a virtual machine includes receiving an incoming data frame. The host system is enabled to use the network connection using a first layer 2 address and a first layer 3 address. The first layer 2 and the first layer 3 addresses are associated with the network connection. The virtual machine is enabled to attempt to use the network connection using a second layer 2 address and a second layer 3 address. The first layer 3 and the second layer 3 addresses are compliant with IPv6.

US Patent:

20130036416, Feb 7, 2013

Filed:

Aug 5, 2011

Appl. No.:

13/204301

Inventors:

Nithin Bangalore RAJU - Sunnyvale CA, US
Scott J. GOLDMAN - Palo Alto CA, US
Anupam CHANDA - San Jose CA, US
Bhavesh Purushottam DAVDA - Fremont CA, US

Assignee:

VMWARE, INC. - Palo Alto CA

International Classification:

G06F 9/455
H04L 12/56

US Classification:

718 1, 370401

Abstract:

Embodiments provide a network address translation (NAT) service for network devices. A network connection from at least one private network device to the NAT service is received and a network connection from at least one remote device to the NAT service is received. The private network device is positioned within a private network and the remote device is positioned within a public network. A network availability of the remote device is determined. If the remote device is unavailable or a network configuration setting associated with the remote device changes, the private network device is notified and a connection reset message is transmitted to the private network device.

US Patent:

20210281508, Sep 9, 2021

Filed:

May 10, 2021

Appl. No.:

17/316652

Inventors:

- Palo Alto CA, US
Jianjun Shen - Redwood City CA, US
Pankaj Thakkar - Cupertino CA, US
Anupam Chanda - San Jose CA, US
Ronghua Zhang - San Jose CA, US
Ganesan Chandrashekhar - Campbell CA, US
Vicky Liu - Beijing, CN
Da Wan - Beijing, CN
Frank Pan - Beijing, CN
Hua Wang - Beijing, CN
Donghai Han - Beijing, CN

International Classification:

H04L 12/721
H04L 12/46
H04L 12/733

Abstract:

For a managed network including multiple host machines implementing multiple logical networks, some embodiments provide a method that reduces the memory and traffic load required to implement the multiple logical networks. The method generates configuration data for each of multiple host machines including (i) data to configure a host machine to implement a set of logical forwarding elements that belong to a set of routing domains and (ii) identifiers for each routing domain in the set of routing domains. The method then receives data regarding tunnels endpoints operating on each of the host machines and an association with the routing identifiers sent to the host machines. The method then generates a routing domain tunnel endpoint list for each routing domain based on the data received from each of the host machines including a list of the tunnel endpoints associated with the routing domain which the host machines can use to facilitate packet processing.

US Patent:

20210243112, Aug 5, 2021

Filed:

Feb 15, 2021

Appl. No.:

17/176159

Inventors:

- Palo Alto CA, US
Anupam Chanda - San Jose CA, US
Benjamin L. Pfaff - Redwood City CA, US
Justin Pettit - Los Altos Hills CA, US
Amar Padmanabhan - Menlo Park CA, US

International Classification:

H04L 12/761
H04L 12/46
G06F 9/455
H04L 12/721
H04L 29/06

Abstract:

Some embodiments provide a set of one or more network controllers that communicates with a wide range of devices, ranging from switches to appliances such as firewalls, load balancers, etc. The set of network controllers communicates with such devices to connect them to its managed virtual networks. The set of network controllers can define each virtual network through software switches and/or software appliances. To extend the control beyond software network elements, some embodiments implement a database server on each dedicated hardware. The set of network controllers accesses the database server to send management data. The hardware then translates the management data to connect to a managed virtual network.

US Patent:

20200382407, Dec 3, 2020

Filed:

Aug 20, 2020

Appl. No.:

16/997957

Inventors:

- Palo Alto CA, US
Pankaj THAKKAR - Cupertino CA, US
Anupam CHANDA - Los Altos CA, US
Jianjun SHEN - Redwood City CA, US
Caixia JIANG - Beijing, CN
Hua WANG - Beijing, CN
Donghai HAN - Beijing, CN

Assignee:

Nicira, Inc. - Palo Alto CA

International Classification:

H04L 12/751
H04L 12/24
H04L 29/12
H04L 12/721

Abstract:

Example methods are provided for assigning a routing domain identifier in a logical network environment that includes one or more logical distributed routers and one or more logical switches. In one example, the method may comprise obtaining network topology information specifying how the one or more logical distributed routers are connected with the one or more logical switches; and selecting, from the one or more logical switches, a particular logical switch for which routing domain identifier assignment is required. The method may also comprise: identifying a particular logical distributed router that is connected with the particular logical switch based on the network topology information; assigning the particular logical switch with the routing domain identifier that is associated with the particular logical distributed router; and using the routing domain identifier in a communication between a management entity and a host.

US Patent:

20200366550, Nov 19, 2020

Filed:

Aug 2, 2020

Appl. No.:

16/945912

Inventors:

- Palo Alto CA, US
Hua Wang - Beijing, CN
Ziyou Wang - Beijing, CN
Bolt Zhang - Beijing, CN
Pradeep Singh - Palo Alto CA, US
Anupam Chanda - San Jose CA, US

International Classification:

H04L 12/24
H04L 12/939
H04L 12/18
H04L 12/46

Abstract:

For a network with host machines that are hosting virtual machines, a method for facilitating BUM (broadcast, unknown unicast, and multicast) traffic between a hardware switch (e.g., ToR switch) and the host machines is provided. The network has a set of host machines configured as a cluster of replicators for replicating BUM traffic from the hardware switch to the host machines. A set of network controllers establishes failure-detection tunnels for links between the hardware switch and the replicator cluster. The replicator cluster informs the set of controllers of a change in the membership of the replicator cluster to initiate an update to the active failure-detection sessions. The set of network controllers communicates with the replicator cluster and a ToR switch to establish bidirectional forwarding detection (BFD) sessions between one or more replicator nodes in the replicator cluster and the ToR switch.