PHY ability auto-negotiation system
A system includes a first device having a first physical layer transceiver (PHY) and a first port that is coupled to the first PHY and that operates in a mode. The system also includes a second device having a second PHY and a second port that is coupled to the second PHY and that operates in a mode. The second device provides, through the second port via a cable coupled to the first port to the first device and prior to advertising the at least one mode that the second port is configured to operate in, a second PHY ability of the second PHY. The second device receives a first PHY ability of the first PHY and determines that a mismatch exists between the first and second PHY abilities. In response to the mismatch, the second device adjusts the operation of the second PHY to correct the mismatch.
1. An auto-negotiation system, comprising:
a first computing device having a first communication subsystem that includes a first physical layer transceiver (PHY) device and a first port that is coupled to the first PHY device and that is configured to operate in at least one mode; and
a second computing device having a second communication subsystem that includes a second PHY device and a second port that is coupled to the second PHY device and that is configured to operate in at least one mode, wherein the first port and the second port are coupled together via a cable, and wherein the second computing device is configured to:
provide, through the second port via the cable to the first computing device and prior to advertising the at least one mode that the second port is configured to operate in, a second PHY ability of the second PHY device;
receive, through the second port via the cable from the first computing device, a first PHY ability of the first PHY device; and
determine that a mismatch exists between the first PHY ability and the second PHY ability and, in response, adjust an operation of the second PHY device to correct the mismatch.
2. The system of claim 1 , wherein the adjusting the operation of the second PHY device to correct the mismatch includes disabling the second PHY ability on the second PHY device when the second PHY ability is not enabled on the first PHY device.
3. The system of claim 1 , wherein the first computing device is configured to:
provide, through the first port via the cable to the second computing device and prior to advertising the at least one mode that the first port is configured to operate in, the first PHY ability;
receive, through the first port via the cable from the second computing device, the second PHY ability of the second PHY device; and
determine that a mismatch exists between the first PHY ability and the second PHY ability and, in response, adjust the operation of the first PHY device to correct the mismatch.
4. The system of claim 3 , wherein the adjusting the operation of the first PHY device to correct the mismatch includes disabling the first PHY ability on the first PHY device when the first PHY ability is not enabled on the second PHY device.
5. The system of claim 1 , wherein the first PHY ability and the second PHY ability each include at least one of an auto-negotiation ability and error correction ability.
6. The system of claim 1 , wherein the second PHY ability is provided in a base page of an auto-negotiation process performed by the second PHY device.
7. The system of claim 1 , wherein the second computing device is further configured to:
provide, through the second port to the first computing device via the cable in response to the adjusting the operation of the second PHY device to correct the mismatch, a second link ability that advertises the at least one mode that the second port is configured to operate in.
8. The system of claim 1 , wherein the adjusting the operation of the second PHY device to correct the mismatch includes providing a notification of the mismatch to an administrator via an indicator included on the second computing device.
9. An Information Handling System(IHS), comprising:
a first communication subsystem that includes a first physical layer transceiver (PHY) device and a first port that is coupled to the first PHY device and that is configured to operate in at least one mode;
a processing system coupled to the first communication subsystem; and
a memory system that is coupled to the processing system and that includes instructions that, when executed by the processing system, cause the processing system to:
provide, through the first port via a cable to a second computing device and prior to advertising the at least one mode that the first port is configured to operate in, a first PHY ability of the first PHY device, wherein the second computing device has a second communication subsystem that includes a second PHY device and a second port that is coupled to the second PHY device and that is configured to operate in at least one mode, and wherein the first port and the second port are coupled together via a cable;
receive, through the first port via the cable from the second computing device, a second PHY ability of the second PHY device; and
determine that a mismatch exists between the first PHY ability and the second PHY ability and, in response, adjust an operation of the first PHY device to correct the mismatch.
10. The IHS of claim 9 , wherein the adjusting the operation of the first PHY device to correct the mismatch includes disabling the first PHY ability on the first PHY device when the first PHY ability is not enabled on the second PHY device.
11. The IHS of claim 9 , wherein the second computing device is configured to:
provide, through the second port via the cable to the first port and prior to advertising the at least one mode that the second port is configured to operate in, the second PHY ability;
receive, through the second port via the cable from the first port, the first PHY ability of the first PHY device; and
determine that a mismatch exists between the PHY ability and the second PHY ability and, in response, adjust the operation of the second PHY device to correct the mismatch.
12. The IHS of claim 11 , wherein the adjusting the operation of the second PHY device to correct the mismatch includes disabling the second PHY ability on the second PHY device when the second PHY ability is not enabled on the first PHY device.
13. The IHS of claim 9 , wherein the first PHY ability and the second PHY ability each include at least one of an auto-negotiation ability and error correction ability.
14. The IHS of claim 9 , wherein the first PHY ability is provided in a base page of an auto-negotiation process performed by the first PHY device.
15. The IHS of claim 9 , wherein the adjusting the operation of the first PHY device to correct the mismatch includes providing a notification of the mismatch to an administrator via an indicator coupled to the processing system.
16. A method for PHY ability auto-negotiation, comprising:
providing, by a first computing device, a first PHY ability of a first physical layer transceiver (PHY) device via a cable to a second computing device, wherein the first PHY ability is provided through a first port that is configured to operate in at least one mode and that is coupled to the first PHY device, and is provided through the first port prior to advertising the at least one mode that the first port is configured to operate in, wherein the second computing device includes a second PHY device and a second port that is coupled to the second PHY device and that is configured to operate in at least one mode, and wherein the first port and the second port are coupled together via the cable;
receiving, by the first computing device through the first port via the cable from the second computing device, a second PHY ability of the second PHY device; and
determining, by the first computing device, that a mismatch exists between the first PHY ability and the second PHY ability and, in response, adjusting an operation of the first PHY device to correct the mismatch.
17. The method of claim 16 , wherein the adjusting the operation of the first PHY device to correct the mismatch includes disabling the first PHY ability on the first PHY device when the first PHY ability is not enabled on the second PHY device.
18. The method of claim 16 , wherein the first PHY ability and the second PHY ability each include at least one of an auto-negotiation ability and error correction ability.
19. The method of claim 16 , wherein the first PHY ability is provided in a base page of an auto-negotiation process performed by the first PHY device.
20. The method of claim 16 , wherein the adjusting the operation of the first PHY device to correct the mismatch includes providing a notification of the mismatch to an administrator via an indicator coupled to the first computing device.