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US 9,959,234 B2Granted
MultiGig solution on conventional SGMII and XFI capable system
AssigneeCisco Technology, Inc.
InventorsAjith Chandran, Kabiraj Sethi, Chandra Sekhara Rao Vempali, Neha Agarwal
Life of this patent
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Abstract
Methods and systems are disclosed which may provide MultiGig capability to a system where a physical layer device (PHY) or a network device does not have the capacity to support all available line speeds while operating in a single system-interface mode between MAC and PHY devices.
Claims20
A method comprising:
- configuring a network device comprising a MultiGig PHY and a media access control (MAC) application specific integrated circuit (ASIC), wherein configuring the network device comprises configuring the network device at a lower system interface mode upon initialization of the network device, wherein the MultiGig PHY and the MAC ASIC are connected via a system interface, wherein the MAC ASIC comprise a first MAC operable at a first speed and a second MAC operable at a second speed, and wherein configuring the network device further comprises configuring the system interface at the first speed;
- determining a line speed of a link from the MultiGig PHY;
- determining that the line speed is greater than a predetermined speed;
- reconfiguring both the MultiGig PHY and the MAC ASIC to a higher system interface mode in response to determining that the line speed is greater than the predetermined speed;
- reconfiguring the system interface to the second speed;
- and
- reconfiguring the MAC ASIC to perform egress shaping at the line speed.
4 more elements
A method comprising:
- operating a system interface in a lower power system interface mode while a PHY media dependent interface (MDI) link is down, wherein the system interface operates between a media access control (MAC) application specific integrated circuit (ASIC) and a MultiGig PHY, and wherein the MAC ASIC comprise a first MAC operable at a first speed and a second MAC operable at a second speed;
- egress shaping at a default rate while the PHY MDI link is down;
- determining a line speed for the PHY MDI link connecting the MultiGig PHY and a link partner when the PHY MDI link comes up;
- determining that the line speed is greater than a predetermined speed;
- reconfiguring the system interface to a higher power system interface mode if the line speed in response to determining that greater than the predetermined rate;
- reconfiguring both the MAC ASIC and the MultiGig PHY to the second speed;
- and
- reconfiguring the MAC ASIC to perform egress shaping at the line speed.
5 more elements
A system comprising:
- a memory;
- a processor capable of executing instructions stored on the memory, the instructions comprising:
- configuring a network device comprising a MultiGig PHY and a media access control (MAC) application specific integrated circuit (ASIC), wherein configuring the network device comprises configuring the network device at a lower system interface mode upon initialization of the network device, wherein the MultiGig PHY and the MAC ASIC are connected via a system interface, wherein the MAC ASIC comprise a first MAC operable at a first speed and a second MAC operable at a second speed, and wherein configuring the network device further comprises configuring the system interface at the first speed;
- determining a line speed of a link from the MultiGig PHY;
- determining that the line speed is greater than a predetermined speed;
- reconfiguring both the MultiGig PHY and the MAC ASIC to a higher system interface mode in response to determining that the line speed is greater than the predetermined speed;
- reconfiguring the system interface to the second speed;
- and
- reconfiguring both the MAC ASIC to perform egress shaping at the line speed on a Media Dependent Interface (MDI) side.
6 more elements
Dependencies are inferred from the claim text.