Setting Port Parameters Manually
If autonegotiation is not enabled on the other end of the connection, you must manually configure the port params of the GigaVUE-HCT module port to match, followed by a write to save the current settings.
The port params commands are available in the Configure mode. The syntax is as follows:
port <port-list> params admin <disable | enable> autoneg <disable | enable> discovery <cdp | lldp | all | disable> duplex <full> forcelinkup <disable | enable> speed <10 | 100 | 1000 | 10000> taptx <active | passive>
The following table summarizes these options:
|
Argument |
Description |
|
admin <disable | enable> |
Enables/disables ports administratively. Use the show port params command to see which ports are enabled and disabled. Refer to Setting Port Parameters Manually for a summary of how this argument interacts with the admin argument. |
|
autoneg <disable | enable> |
Enables and disables autonegotiation for a port. When autonegotiation is enabled, duplex and speed settings are ignored (they are set via autonegotiation). Refer to Setting Port Parameters Manually for a summary of how this argument interacts with the admin argument. Autonegotiation is always disabled for 10Gb ports. For 1Gb speeds over copper, autonegotiation must be enabled, per the IEEE 802.3 specification. Gb optical ports cannot enable autoneg. |
|
discovery <cdp | lldp | all | disable> |
Configures port discovery options, as follows: cpd—Enables CDP port discovery. lldp—Enables LLDP port discovery. all—Enables all port discovery protocols (meaning both CDP and LLDP). disable—Disables port discovery. Discovery is disabled by default. To enable discovery, configure one or more protocols. |
|
duplex <full> |
Specifies the port's duplex configuration. Only full duplex is supported. Starting in software version 5.2, half duplex support is removed from all GigaVUE nodes. If half duplex was configured in a previous software version, it will remain intact following the upgrade to 5.2 or higher release. Update to full duplex, if required. |
|
forcelinkup <disable | enable> |
Forces connection on an optical port. Use this option when an optical tool port is connected to a legacy optical tool that does not transmit light. Available as follows: Optical 1Gb/10Gb/25Gb tool ports Not available for 10Gb-capable ports with a 1Gb SFP installed. 10Gb-capable optical tool ports only support forcelinkup when a 10Gb SFP+ is installed. |
Forcelinkup and Enabling/Disabling Ports
The GigaVUE-HCT node includes both forcelinkup and admin arguments for the port params command. The forcelinkup argument forces the link state on an optical tool port connected to a legacy tool that does not transmit the light required to bring the link up. The following table summarizes how traffic flows for different combinations of port params admin and port params forcelinkup applied to an optical tool port.
|
|
forcelinkup = disable |
forcelinkup = enable |
|
admin = enable |
No traffic passed if autonegotiation is not successful. |
Traffic is passed. |
|
admin = disable |
No traffic passed. |
No traffic passed. |
