gig-default

Configures the Gbps fiber negotiation mode on individual ports, overriding the global configuration mode.
Syntax
gig-default{auto-gig|compatibility-mode|neg-full-auto|neg-off }
no gig-default{auto-gig|compatibility-mode|neg-full-auto|neg-off }
Command Default

The globally configured Gbps negotiation mode is the default mode for all Gbps fiber ports.

Parameters
auto-gig
Configures the port to try to perform a handshake with the other port to exchange capability information.
compatibility-mode
Configures compatibility mode, to enable CLASS 73 auto-negotiation, on individual ports.
neg-full-auto
Configures the port to first try to perform a handshake with the other port to exchange capability information. If the other port does not respond to the handshake attempt, the port uses the manual configuration (or the default if an administrator has not configured the information). That is, the device first performs auto-negotiation and, if it fails, then performs non-auto-negotiation. This is the default configuration.
neg-off
Configures the port to not try to perform a handshake. Instead, the port uses information that was manually configured by an administrator.
Modes

Interface configuration mode

Usage Guidelines

When Gbps negotiation mode is turned off (using the gig-default neg-off command), the device may inadvertently take down both ends of a link. This is a hardware limitation for which there is currently no workaround.

The following limitations apply to the gig-default neg-off command:

  • The port must be at least a 10-Gbps port.
  • The port must have a speed of at least 1000 Mbps. You can add speed optics only to those ports where it is required. 1-Gbps and 10-Gpbs ports have auto-negotiation enabled. Therefore, the gig-default neg-off command must be used only if the remote end does not enable auto-negotiation.

When compatibility mode is used, (using the gig-default compatibility-mode command), CL73 auto-negotiation mode is enabled. The gig-default compatibility-mode command resets the configuration to the default auto-negotiation settings and removes CL73 auto-negotiation mode.

Note: The compatibility-mode keyword is supported only for ICX 7650 and ICX 7850 switches only.

The no form of the command resets the configuration to the default of trying to perform a handshake with other ports to exchange capability information.

Examples

The following example sets the negotiation mode to auto-gig mode for ports 1/1/1 to 1/1/4. 

device(config)# interface ethernet 1/1/1 to 1/1/4
device(config-mif-1/1/1-1/1/4)# gig-default auto-gig

The following example sets the compatibility mode for port 1/2/1. 

device# configure terminal
device(config)# interface ethernet 1/2/1
device(config-if-1/2/1)# gig-default compatibility-mode
History
Release version Command history
08.0.90g The compatibility-mode keyword was added.
08.0.95 Limitations for the gig-default neg-off command were added.
09.0.00a Limitations for the gig-default neg-off command were added.
Parent topic: Commands D through H