Users Guide

Fabric OS Administrator’s Guide 91
53-1002920-02
Ports
3
The setting is retained and applied any time an 8 Gbps device logs in. Upgrades from prior releases
which supported only Modes 0 and 1 will not change the existing setting, but switches reset to
factory defaults with Fabric OS v6.3.1 or later will be configured to Mode 0 by default. The default
setting on new units may vary by vendor.
Modes 2 and 3 are compliant with FC-FS-3 specifications (standards specify the IDLE/ARBF
behavior of Mode 2, which is used by Mode 3 if ARBF/ARBF fails after three attempts). For most
environments, Brocade recommends using Mode 3, as it provides more flexibility and compatibility
with a wide range of devices. In the event that the default setting or Mode 3 does not work with a
particular device, contact your switch vendor for further assistance.
Swapping port area IDs
If a device that uses port binding is connected to a port that fails, you can use port swapping to
make another physical port use the same PID as the failed port. The device can then be plugged
into the new port without the need to reboot the device.
If two ports are changed using the portSwap command, their respective areas and “P” values are
exchanged.
For ports that are numbered above 255, the “P” value is a logical index. The first 256 ports
continue to have an index value equal to the area ID assigned to the port. If a switch is using Core
PID format, and no port swapping has been done, the port index value for all ports is the same as
the physical port numbers. Using portSwap on a pair of ports will exchange those ports’ area ID
and index values.
Port swapping has the following restrictions:
• Shared area ports cannot be swapped.
• Ports that are part of a trunk group cannot be swapped.
• GbE ports cannot be swapped.
• Ports on a faulty blade cannot be swapped.
• Swapping ports between different logical switches is not supported. The ports on the source
and destination blades must be in the same logical switch.
• The portSwap command is not supported for ports above 256.
Use the following procedure to swap the port area IDs of two physical switch ports. To swap port
area IDs, the port swap feature must be enabled, and both switch ports must be disabled. The
swapped area IDs for the two ports remain persistent across reboots, power cycles, and failovers.
NOTE
On the Brocade DCX and DCX 8510 Backbone families, you can swap only ports 0 through 15 on the
FC8-48 port blades. You cannot swap ports 16 through 47.
1. Connect to the switch and log in using an account with admin permissions.
2. Enter the portSwapEnable command to enable the feature.
3. Enter the portDisable command on each of the source and destination ports to be swapped.
switch:admin>portdisable 1
ecp:admin>portdisable 1/2
4. Enter the portSwap command.
switch:admin>portswap 1 2
ecp:admin>portswap 1/1 2/2