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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.
Port priority (QoS) modification
You can give preference to the inbound traffic on specific ports by changing the Quality of Service
(QoS) level on those ports. For information and procedures, refer to "Quality of Service" chapter in the
FastIron Ethernet Switch Traffic Management Guide .
Dynamic configuration of Voice over IP (VoIP) phones
You can configure a FastIron device to automatically detect and re-configure a VoIP phone when it is
physically moved from one port to another within the same device. To do so, you must configure a
voice
VLAN ID on the port to which the VoIP phone is connected. The software stores the voice VLAN ID in
the port database for retrieval by the VoIP phone.
The dynamic configuration of a VoIP phone works in conjunction with the VoiP phone discovery
process. Upon installation, and sometimes periodically, a VoIP phone will query the Brocade device for
VoIP information and will advertise information about itself, such as, device ID, port ID, and platform.
Changing the Gbps fiber negotiation mode
FastIron Ethernet Switch Administration Guide 75
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