Brocade FastIron Ethernet Switch Stacking Configuration Guide - Manual (Page 38)

BPDU guard is Disabled, ROOT protect is Disabled
Link Error Dampening is Disabled
STP configured to ON, priority is level0, mac-learning is enabled
Flow Control is enabled
mirror disabled, monitor disabled
Not member of any active trunks
Not member of any configured trunks
No port name
IP MTU 1500 bytes, encapsulation ethernet
300 second input rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
300 second output rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 multicasts, 0 unicasts
0 input errors, 0 CRC, 0 frame, 0 ignored
0 runts, 0 giants
0 packets output, 0 bytes, 0 underruns
Transmitted 0 broadcasts, 0 multicasts, 0 unicasts
0 output errors, 0 collisions
Relay Agent Information option: Disabled
device(config-if-e10000-cx4-1/2/1)#
Configuring default ports on FCX devices
On FCX devices, the default-port command is used to define stacking port candidates. A stacking
port is always a default port, but a default port may not necessarily be a stacking port. Default ports
can become stacking ports using the secure-setup utility, or through automatic stack building.
Secure-setup probe packets can be received by a default port whether or not it is acting as a stacking
port. Stacking packets can be only received by a stacking port (which is also always a default port). In
order to use stacking ports that are not defined in the default configuration, you must define the port
settings for each unit using the default-port command, so that secure-setup can discover the topology
of the stack.
The 4-byte Ethernet preamble for the Ethernet frame is used when a port is configured as a default
stacking port. For non-default ports, the standard 8-byte Ethernet preamble is used. For a default port
that is used as a regular data port, the standard 8-byte Ethernet preamble must be explicitly enabled
on the port using the long-preamble command. For details, refer to “Configuring a default stacking
port to function as a data port.”
Stackable devices ship with two default stacking ports configured. Use the stack-port command to
select only one of these factory default ports as the stacking port. If you do not configure stack-port,
both default ports will operate as stacking ports.
Use the default-port command to use ports other than the factory default ports as stacking ports. You
must configure default-port on each unit before building a stack. Once you have configured default-
port on all units, you can then use any of the three stack construction methods to build a stack. The
active controller then learns the port configuration for each unit.
NOTE
You cannot change the setting for a default port if the port is in use.
Changing default stacking port configurations
For FCX-E and FCX-I devices, ports 1 and 2 of the optional 10 Gbps SFP+ module (slot 2) act as the
default stacking ports. You can change the default stacking ports to 3 and 4 on this module, or disable
stacking, on all of the module ports. The following example changes the default ports on a 10 Gbps
module from 1 and 2 to 3 and 4.
device 10g-1(config)# stack unit 1
10g-1(config-unit-1)#
10g-1(config-unit-1)# default-ports 1/2/3 1/2/4
Configuring default ports on FCX devices
36 FastIron Ethernet Switch Stacking Configuration Guide
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