Brocade FastIron Ethernet Switch Stacking Configuration Guide - Manual (Page 47)

1. Ports of the same trunk connect to different units.
2. Ports of the same trunk connect to different trunks of the same unit.
3. One end of a 10G port is up and the other end is down.
4. Communication problems between units of the stack
Another connection error is that the two cables of a trunk go to different units, or to different trunks
of the same unit as in case 1 and 2. Stack might still form in these cases. But it may cause internal
forwarding loop, or have forwarding problem.
Cases 3 to 5 are due to hardware failures or software problems.
Error messages encountered during the configuration of an ICX 6430 or
ICX 6450 traditional stack
The following error messages may occur when configuring an ICX 6430 orICX 6450 traditional stack:
• If you form a multi-trunk connection on two sets of stack ports that are not directly connected on
neighboring units, the multi-stack-trunk command is rejected and an error message is displayed.
The following is an example of an error message.
Error! 1/2/3 has no connection. Please use "stack-trunk".
• When a unit joins or leaves a stack, or a stack trunk is configured using the stack-trunk command,
a stack election is triggered. The multi-stack-trunk command triggers a stack election among the
stack units and reprograms (or removes) the stack trunk port in the hardware. A timer is set on all
units to coordinate a stack election. The traffic interruption time generally takes less than 5 seconds
for the system to detect the port down event and reprogram hardware. You must wait for the stack
election to be completed before entering another command. If you do not wait for the stack election
to finish, the following warning message is displayed.
Stack port or trunk change is in progress, please try later.
• You cannot enter the stack switch-over command until the stack election is completed. You can
enter the stack switch-over command following the multi-stack-trunk command configuration. If
you enter the stack switch-over command before the stack election is completed, the following
warning message is displayed.
Please try later, reason: during stack port or trunk deployment.
• If ports 2 and 4 of theICX 6450 device are not configured to 10 Gbps port speed, then the multi-
stack-trunk command and the stack-trunk command are rejected with the following error
message.
Error! port 1/2/2 is not configured as 10G
You must first enable the port to 10 Gbps port speed using the speed-duplex 10g-full command. For
more information about configuring ports to 10 Gbps port speed, refer to “Licensing for Ports on
Demand” in the FastIron Ethernet Switch Administration Guide .
• You cannot use the stack-port command to remove a stacking port if the port is part of a stack
trunk. You must first remove the stack trunk and then remove the stack port. Use the stack-trunk
command or the multi-stack-trunk command to remove the stack trunk. If you attempt to remove
the stack port before removing the stack trunk, an error message is displayed. The following is an
example of an error message.
Please remove stack-trunk 1/2/3 - 1/2/4 using "stack-trunk" or "multi-stack-trunk"
command before removing stack port 1/2/3.
Error messages encountered during the configuration of an ICX 6430 or ICX 6450 traditional stack
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