Shivaranjani S Krishnan

US Patent:

20140050077, Feb 20, 2014

Filed:

Aug 20, 2012

Appl. No.:

13/589333

Inventors:

Siddharth Kasat - San Jose CA, US
Christian Sasso - Milpitas CA, US
Ankur Goyal - Sunnyvale CA, US
Shivaranjani Sankara Krishnan - Sunnyvale CA, US
Yibin Yang - San Jose CA, US

Assignee:

CISCO TECHNOLOGY, INC. - San Jose CA

International Classification:

H04L 29/14

US Classification:

370216

Abstract:

In Service Software Upgrade (ISSU) permits administrators to upgrade the control plane software of a network device without any disruption to the traffic passing through the data plane of the network device. However, because the control plane is unavailable, the network device is unable to transmit periodic messages to re-subscribe to specific VLANs. This may result in a service outage in end devices that rely on the network device to receive data assigned to those VLANs. To prevent the network device from being unsubscribed from the VLANs while the control plane is unavailable, the network device may transmit a control plane message before starting ISSU. Once a neighboring network device receives the message, the neighboring device delays unsubscribing the network device until the control plane is again available. Thus, the network device may perform ISSU without the possibility of data traffic not reaching end devices.

US Patent:

20160036946, Feb 4, 2016

Filed:

Aug 3, 2015

Appl. No.:

14/816974

Inventors:

- San Jose CA, US
Christian SASSO - Milpitas CA, US
Ankur GOYAL - Sunnyvale CA, US
Shivaranjani Sankara KRISHNAN - Sunnyvale CA, US
Yibin YANG - San Jose CA, US

International Classification:

H04L 29/14
H04L 12/46

Abstract:

Upon receiving a first message, from the second network device, indicating that the second network device is incompatible with one or more virtual local area network (VLAN) pruning techniques, a timer on a first network device is configured to expire after a predetermined period of time. The first network device is configured to maintain a subscription for the second network device to one or more VLANs until the timer expires. The second network device is configured to transmit the first message in response to detecting an upcoming control plane outage at the second device. Prior to the timer expiring, embodiments transmit data assigned to the one or more VLANs to the second network device. Embodiments also periodically receive update messages, from the second network device, identifying one or more VLANs to which the second network device wants to subscribe.

US Patent:

20140269432, Sep 18, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/839969

Inventors:

- San Jose CA, US
Manuwela Kanade - Milpitas CA, US
Shivaranjani Sankara Krishnan - Sunnyvale CA, US
Anand Parthasarathy - Fremont CA, US

International Classification:

H04L 12/24
H04L 12/931

US Classification:

370255

Abstract:

Techniques for configuring a virtual network device are provided. Embodiments identify a network device profile specifying a virtual link teaming domain. Upon receiving a network message advertising the virtual link teaming domain from a peer network device of the two or more network devices, on a plurality of links of the first network device, the plurality of links are teamed, based on the virtual link teaming domain, to create a first link bundle. Embodiments advertise a virtual link teaming identifier to a neighboring network device of the first network device. Here, the neighboring network device is configured to use the virtual link teaming identifier to bundle links between the neighboring network device and the virtual network device.