David E Langley

US Patent:

6446122, Sep 3, 2002

Filed:

Jun 24, 1998

Appl. No.:

09/103755

Inventors:

Vipin Rawat - Sunnyvale CA
David Langley - Los Gatos CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15173

US Classification:

709224

Abstract:

A method and apparatus allows a switch or other network equipment device to provide Quality of Service information to a router or other user equipment devices using a management interface such as frame relay LMI. The switch and router negotiate the version of the management interface that has the capabilities of the present invention. The router can then request Quality of Service parameters from the switch. The switch provides the parameters and the router can use them to route information via the switch. If the parameters are changed in the switch or other changes occur, the switch notifies the router and the router can then request updated parameters from the switch.

US Patent:

6700890, Mar 2, 2004

Filed:

Dec 22, 1997

Appl. No.:

08/996118

Inventors:

David Langley - Los Gatos CA
Gabriel Lee - El Cerrito CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1228

US Classification:

37039531, 3703951, 3703953, 3703937, 709220, 709223, 713 1, 713100

Abstract:

A method and apparatus retrieves and stores configuration information for network endpoint devices from other devices in the network, such as a switch adjacent to the endpoint device. When the endpoint device establishes a connection with the network, it generates a sequence of SNMP getnext commands using the ILMI interface to obtain the configuration information from the network device. If the network device sends a trap to the endpoint device indicating a change has been made to the configuration parameters stored in the network device for a PVC, a series of SNMP getrequest commands are made using the ILMI interface to retrieve the configuration information for that PVC from the network device. If the endpoint device detects an interruption in communication with the network device, the endpoint device discards the information retrieved previously.

US Patent:

6829242, Dec 7, 2004

Filed:

Jun 30, 1998

Appl. No.:

09/107743

Inventors:

Michael Davison - Aberdine WA
Rene Tio - Sunnyvale CA
David Langley - Los Gatos CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 1266

US Classification:

370401, 709227, 709245, 7093952, 370437, 370463, 3703953

Abstract:

A method and apparatus associates a domain name of a home gateway with one or more PVCs. After the PVC is established, a tunneling protocol is used to request the domain name of the home gateway, and the domain name is associated with the PVC. When a user logs on via an access communication device, the user will provide a domain name of a home gateway with which the user desires to communicate. A PVC associated with the home gateway is then used to allow the user to communicate with the home gateway. The domain name of the home gateway may be periodically verified to detect any changes.

US Patent:

6909697, Jun 21, 2005

Filed:

Feb 6, 2001

Appl. No.:

09/778246

Inventors:

David Langley - Los Gatos CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J003/24

US Classification:

370252, 370471

Abstract:

A method and apparatus negotiates a maximum frame size to be used over a frame relay network. A local maximum frame size is identified by a first endpoint device of a frame relay network so that other frames sent and received using that size will not cause other frames sent by the network device to be sent a period of time exceeding an acceptable delay after the other frames are received. The acceptable delay is the lowest acceptable delay among originators and recipients of frames that use the endpoint device. The frame size identified is transmitted to other endpoint devices that can communicate with the first endpoint device. These other endpoint devices identify acceptable delays that correspond to the originators and recipients of such endpoint devices.

US Patent:

7366189, Apr 29, 2008

Filed:

Oct 21, 2004

Appl. No.:

10/970899

Inventors:

Michael Davison - Aberdine WA, US
Rene Tio - Sunnyvale CA, US
David Langley - Los Gatos CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/66
H04L 12/28
H04J 3/16
G06F 15/16

US Classification:

370401, 709227, 709245, 3703952, 370437, 370463, 3703953

Abstract:

A method and apparatus associates a domain name of a home gateway with one or more PVCs. After the PVC is established, a tunneling protocol is used to request the domain name of the home gateway, and the domain name is associated with the PVC. When a user logs on via an access communication device, the user will provide a domain name of a home gateway with which the user desires to communicate. A PVC associated with the home gateway is then used to allow the user to communicate with the home gateway. The domain name of the home gateway may be periodically verified to detect any changes.

US Patent:

7411960, Aug 12, 2008

Filed:

Mar 29, 2004

Appl. No.:

10/812595

Inventors:

David Langley - Los Gatos CA, US
Gabriel Lee - El Cerrito CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28
G06F 12/00

US Classification:

37039531, 709220

Abstract:

A method and apparatus retrieves and stores configuration information for network endpoint devices from other devices in the network, such as a switch adjacent to the endpoint device. When the endpoint device establishes a connection with the network, it generates a sequence of SNMP getnext commands using the ILMI interface to obtain the configuration information from the network device. If the network device sends a trap to the endpoint device indicating a change has been made to the configuration parameters stored in the network device for a PVC, a series of SNMP getrequest commands are made using the ILMI interface to retrieve the configuration information for that PVC from the network device. If the endpoint device detects an interruption in communication with the network device, the endpoint device discards the information retrieved previously.

US Patent:

62528556, Jun 26, 2001

Filed:

Dec 22, 1997

Appl. No.:

8/996115

Inventors:

David Langley - Los Gatos CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J 324

US Classification:

370252

Abstract:

A method and apparatus negotiates a maximum frame size to be used over a frame relay network. A local maximum frame size is identified by a first endpoint device of a frame relay network so that other frames sent and received using that size will not cause other frames sent by the network device to be sent a period of time exceeding an acceptable delay after the other frames are received. The acceptable delay is the lowest acceptable delay among originators and recipients of frames that use the endpoint device. The frame size identified is transmitted to other endpoint devices that can communicate with the first endpoint device. These other endpoint devices identify acceptable delays that correspond to the originators and recipients of such endpoint devices. The other endpoint devices transmit their acceptable delays to the first endpoint device. If the first endpoint device has a payload of information to send to any of the other endpoint devices, the first endpoint device sends the payload using frame sizes not larger than either of the frame size identified by the first endpoint device and the frame size received from the endpoint device to which the frame will be transmitted.