Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 75)

NOTE
Connect the 100BaseFX fiber transceiver after configuring both sides of the link. Otherwise, the link
could become unstable, fluctuating between up and down states.
To enable support for 100BaseFX on an FSX fiber port or on a Stackable switch, enter commands such
as the following.
device(config)# interface ethernet 1/6
device(config-if-1/6)# 100-fx
The above commands enable 100BaseFX on port 6 in slot 1.
Syntax: [no] 100-fx
To disable 100BaseFX support on a fiber port, enter the no form of the command. Note that you must
disable 100BaseFX support before inserting a different type of module In the same port. Otherwise, the
device will not recognize traffic traversing the port.
Changing the Gbps fiber negotiation mode
The globally configured Gbps negotiation mode is the default mode for all Gbps fiber ports. You can
override the globally configured default and set individual ports to the following:
NOTE
Gbps negotiation is not supported on ICX 6430, ICX 6450, and ICX 6650devices.
• Negotiate-full-auto - The port first tries 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
manually configured configuration information (or the defaults if an administrator has not set the
information). This is the default.
• Auto-Gbps - The port tries to perform a handshake with the other port to exchange capability
information.
• Negotiation-off - The port does not try to perform a handshake. Instead, the port uses configuration
information manually configured by an administrator.
To change the mode for individual ports, enter commands such as the following.
device(config)
# interface ethernet 1 to 4
device(config-mif-1-4)# gig-default auto-gig
This command overrides the global setting and sets the negotiation mode to auto-Gbps for ports 1 - 4.
Syntax: gig-default{ neg-full-auto | auto-gig | neg-off ]
NOTE
When Gbps negotiation mode is turned off (CLI command gig-default neg-off ), the Brocade device
may inadvertently take down both ends of a link. This is a hardware limitation for which there is currently
no workaround.
Changing the Gbps fiber negotiation mode
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