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Ishan S Wu

from Cupertino, CA
Age ~74

Ishan Wu Phones & Addresses

  • 11456 Lindy Pl, Cupertino, CA 95014
  • 7732 Obsidian Ct, Cupertino, CA 95014 (408) 255-8890
  • 981 Mangrove Ave, Sunnyvale, CA 94086
  • 976 Ponderosa Ave, Sunnyvale, CA 94086
  • Santa Clara, CA
  • San Jose, CA

Work

Company: Cisco systems, inc. Address: 170 West Tasman Drive, San Jose, CA 95134 Position: Manager, software development

Business Records

Name / Title
Company / Classification
Phones & Addresses
Ishan Wu
Manager, Software Development
Cisco Systems, Inc.
170 West Tasman Drive, San Jose, CA 95134
Ishan Wu
Manager, Software Development
Cisco Systems, Inc.
170 West Tasman Drive, San Jose, CA 95134

Publications

Us Patents

Multicast System For Forwarding Desired Multicast Packets In A Computer Network

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US Patent:
7385977, Jun 10, 2008
Filed:
Sep 10, 2004
Appl. No.:
10/939100
Inventors:
Ishan Wu - Cupertino CA, US
Nagarani Chandika - Sunnyvale CA, US
Yiqun Cai - Cupertino CA, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 12/28
US Classification:
370389, 370469
Abstract:
A method and apparatus for a downstream router to inform an upstream router by use of packets of a new router command protocol that the upstream router is to forward multicast packets of a specified group to the downstream router. First the downstream router transmits a HELLO packet to upstream router to inform the upstream router that the downstream router is a multicast router implementing the invention. Then, in the event that the downstream router receives a packet from an end station requesting multicast packets of a particular group, in response the downstream router sends a JOIN packet to the upstream router. The JOIN packet requests that the upstream router forward the requested group multicast packets to the downstream router. When a multicast group packet arrives at the upstream router, the upstream router forwards the packet to those downstream routers requesting that group.

Constraining Multicast Traffic Between A Layer 2 Network Device And A Router

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US Patent:
8040884, Oct 18, 2011
Filed:
Aug 8, 2005
Appl. No.:
11/198999
Inventors:
Senthil Arunachalam - Fremont CA, US
Sundher Narayanaswamy - San Jose CA, US
Isidoros Kouvelas - Redwood City CA, US
Ishan Wu - Cupertino CA, US
Toerless Eckert - Mountain View CA, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 12/54
US Classification:
370390
Abstract:
A method, system, computer program product and apparatus are presented to enable a L2 network device, such as a bridge or switch, to control the flow of a multicast data stream to a connected router in response to control messages received from the router by the L2 network device. By controlling the flow of multicast data streams in this manner, there will be a corresponding reduction in wasted bandwidth due to unnecessary transmission of these multicast data streams and a reduction in processing overhead by the router due to analysis and dropping of unnecessary multicast frames. In one aspect of the present invention, the router can generate the control messages in response to receiving a data frame in a multicast data stream from the L2 network device. The router can determine whether a subscriber to that multicast data stream is connected downstream of the router and then transmit an appropriate control message to the upstream L2 network device, indicating whether the router does or does not have a downstream subscriber. In response to such a control message, the L2 network device can cease transmitting the multicast data stream to the router, if appropriate.

Multicast System For Forwarding Desired Multicast Packets In A Computer Network

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US Patent:
6847638, Jan 25, 2005
Filed:
Oct 16, 2000
Appl. No.:
09/688895
Inventors:
Ishan Wu - Santa Clara CA, US
Nagarani Chandika - Santa Clara CA, US
Yiqun Cai - Santa Clara CA, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 1256
US Classification:
370389
Abstract:
A method and apparatus for a router to inform a Layer switch by use of packets of a new router group port management protocol (RGMP) that the layer switch is to forward multicast packets of a specified group to the router. First the router transmits a RGMP HELLO packet to the layer switch to inform the switch that the router is a multicast router implementing the invention. Then, in the event that the router receives an IGMP packet from an end station requesting multicast packets of a particular group, in response the router sends an RGMP JOIN packet to the layer switch. The RGMP JOIN packet requests that the layer switch forward only multicast group packets, of the group whose group number is written into a field of the RGMP JOIN packet, to the router. Also, the router sends a prior art PIM JOIN packet to other multicast routers in order to be placed on the multicast distribution tree for that group. The layer switch builds a forwarding table for multicast groups listing ports connected to routers having sent a RGMP JOIN for that group.
Ishan S Wu from Cupertino, CA, age ~74 Get Report