Cisco Technology, Inc.

James Everett Grishaw

Ming Chi Chen

Torence Lu

Shawn Emory Bender

David Phillip Tarkington

Stephen A Scearce

William Jeffrey Lewis

Phong Hoang Ho

Robert Arthur Loose

Lwin O Tint

Helen Shtargot

Rene Duzac

Kimberly Rae Turner

Terri LaBelle Cruse

Dattatri N Mattur

Mick Henniger

Robert Chen

Mickey Henniger

Sanjoy Dey

A double data rate bus system includes a host-network interface card configuration wherein the host is configured to recognize the network interface card to establish a double data rate bus between the host and the network interface card. The host is configured to generate a plurality of generic data frame queues. Each of the generic data frame queues is configured to receive and to transmit generic data frames via the double data rate bus. The network interface card is configured to transmit a plurality of dynamic memory access read requests to the host via the double data rate bus. The host is configured to allow each of the plurality of dynamic memory access read requests to remain pending prior to responding to any one of the plurality of dynamic memory access read requests.

Host-daughtercard configuration with double data rate bus

A network device includes card slots and Network Module slots that be reconfigured to hold cards and network modules having different form factors.

Slot adapter for reconfiguring slots in a network device

A host-daughtercard interface is pin compatible with a legacy interface but redefines a subset of pins to implement a high-bandwidth double data-rate (DDR) bus. By inspecting a cookie on the daughtercard, the host platform determines whether the daughtercard supports the DDR bus or the legacy interface, and then configures the subset of pins to implement the legacy interface or the DDR bus.

Backward-compatible parallel DDR bus for use in host-daughtercard interface

A router includes WIC and Network Module slots that be reconfigured to hold cards and network modules having different form factors. A motherboard/midplane arrangement provides for a field replaceable motherboard that can be replaced without removing the router from the rack.

Router with field replaceable motherboard

A method and apparatus for implementing host management of an intelligent daughtercard utilizes a high-speed serial link and a defined plurality of serial protocol commands to provide high bandwidth control path for management of daughtercard memory and application specific initialization and/or configuration changes.

Serial protocol for efficient messaging between host and intelligent daughtercards over a serial link

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Santa Clara, CA, United States of America

James Everett Grishaw