Configuration Guide User guide

FastIron Configuration Guide 267
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Configuring an ICX 6430 and ICX 6450 IronStack
Configuring ICX 6430 or ICX 6450 trunked stacking ports
NOTE
Brocade advises using the stack-trunk command in a new environment on first deployment. Brocade
recommends using the multi-trunk command in a production environment. For more information
about the multi-trunk command refer to “Configuring ICX 6430 or ICX 6450 multi-trunked stacking
ports” on page 267.
The stack-trunk command forms a single trunk-to-port connection on two connected stack units. A
trunk-to-port connection is formed when one side of the ports forms a trunk, and the other side of
the ports does not. You can use the stack-trunk command to configure a stack trunk if one or both
of the units are provisional units. You must enable stacking and connect cables properly for the
stack to work. To enable the stack-trunk command, the primary port in the trunk must be
configured under the stack-port command configuration.
For ICX 6450 devices, the data ports on both units must be configured to 10 Gbps port speed to
enable trunking. To upgrade to 10 Gbps port speed on ports 2 and 4, use the
ICX6450-2X10G-LIC-POD license. If the data port is not enabled for 10 Gbps port speed, the port
status is down. For more information about configuring ports to 10 Gbps port speed, refer to
“Licensing for Ports on Demand” on page 208.
Configure a stack truck by entering the following command under the stack unit configuration level.
Brocade (config)#stack unit 1
Brocade (config-unit-1)#stack-trunk 1/2/3 to 1/2/4
The following warning is displayed on the CLI if the stack-trunk command results in a trunk-to-port
connection.
Error- this command will result in a port-to-trunk connection between stack 1 and
2. Please use "multi-trunk" command instead.
Use the multi-trunk command to configure a stack trunk on two directly connected stack units to
ensure that a trunk-to-trunk connection is formed on both units at the same time.
Syntax: [no] stack-trunk
Use the no form of the command to disable the stack trunk configuration.
To save the configuration, enter the write memory command.
Configuring ICX 6430 or ICX 6450
multi-trunked stacking ports
To upgrade from a single to a double port trunk configuration, use the multi-trunk command. The
multi-trunk command is used to ensure that a stack trunk is formed on two directly connected
stack units at the same time. The multi-trunk command can only be enabled on the active
controller unit. By configuring a multi-trunk on two sets of connected stack ports, a trunk-to-port
connection is avoided. A trunk-to-port connection is formed when one side of the ports forms a
trunk, and other side of the ports does not. A trunk-to-port connection can result in packet drops
and can potentially break a stacking link.
The primary ports of the stack trunk must be connected and in an up status to enable the
multi-trunk command. If the primary stack trunk ports are not connected and not in an up status,
the command is rejected and the following error message is displayed on the CLI.