Users Guide

Fabric OS Administrator’s Guide 93
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Ports
3
Fabric OS 7.1.0 and later provides F_Port decommissioning and recommissioning using Brocade
Network Advisor 12.1.0 and later. Refer to the Brocade Network Advisor User Manual for details.
NOTE
All members of a trunk group must have an equal link cost value in order for any of the members to
be decommissioned. If any member of a trunk group does not have an equal cost, requests to
decommission a trunk member will fail and an error reminding the caller of this requirement is
produced.
The following restrictions apply to port decommissioning:
• The local switch and the remote switch on the other end of the E_Port must both be running
Fabric OS 7.0.0 or later.
• Port decommissioning is not supported on links configured for encryption or compression.
• Port decommissioning is not supported on ports with DWDM, CWDM, or TDM.
• Port decommissioning requires that the lossless feature is enabled on both the local switch
and the remote switch.
Use the portDecom command to begin the decommission process.
Setting port modes
Ports can be set to use one of three link operating modes: full duplex, half duplex, or autonegotiate.
Changing the link operating mode is not supported for all network interfaces or for all Ethernet
network interfaces. On the CP blade in a Brocade DCX, DCX-4S, DCX 8510-4, or DCX 8510-8, the
supported interfaces are eth0 and eth3. On all other platforms, only eth0 is supported.
For dual-CP systems, the ifModeSet command affects only the CP to which you are currently logged
in. Therefore, to set the link operating mode on the active CP, you must issue the ifModeSet
command on the active CP; and to set the mode on the standby CP, you must issue the ifModeSet
command on the standby CP. During failover, the mode is retained separately for each CP because
the physical links may be set to operate in different modes.
ATTENTION
Forcing the link to an operating mode not supported by the network equipment to which it is
attached may result in an inability to communicate with the system through its Ethernet interface. It
is recommended that the ifModeSet command be used only from the serial console port. When used
through an interface other than the serial console port, the command displays a warning message
and prompts for verification before continuing. This warning is not displayed and you are not
prompted when the command is used through the serial console port.
Use the following procedure to set the mode of a port.
1. Connect to the switch and log in using an account with admin permissions.
2. Enter the ifModeSet command.
Enter y or yes at the prompts to confirm the active link operating mode values. Enter n or no to
deactivate that mode.
Example of setting the port mode to full autonegotiate
The following example sets the mode for eth3 to autonegotiate, and permits both full and half
duplex modes to be selected at both 10 and 100 Mbps. Note that the caution shown in this
example is not displayed when the command is entered using the serial console port.