Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 28)

Syntax: [no] mac-learning-flow-based
Use the no form of the command to disable flow-based MAC address learning. When disabled, all
dynamically-learned MAC addresses are flushed from the hardware and software MAC tables and are
subsequently learned using global MAC address learning.
Increasing the capacity of the MAC address table (optional)
After enabling support for flow-based MACs, you can increase the capacity of the MAC address table
of up to 32K MAC addresses. By default, up to 32K MAC addresses are supported.
NOTE
FCX devices do not support flow-based MACs and the capacity of the MAC address table cannot be
altered on FCX devices.
NOTE
On ICX 6650, you can increase the capacity of the MAC address table of up to 64K MAC addresses.
By default, up to 64K MAC addresses are supported.
To increase the capacity of the MAC table, enter commands such as the following.
device(config)#system-max mac 32768
device(config)#write memory
device(config)#exit
device#reload
NOTE
You must save the configuration and reload the software to place the system-max mac change into
effect.
Syntax: system-max mac max-flow-MACs
The max-flow-MACs parameter specifies the maximum number of MAC addresses in the MAC table.
For flow-based MACs, the minimum value is 16K and the default value is 32K (16k for FSX).
Use the command show default values to display the default, maximum, and currently configured
values for the MAC address table.
Displaying information about flow-based MACs
The show mac-address command includes information related to flow-based MAC address learning.
The following shows an example show mac output.
device# show mac
Total active entries from all ports = 15
MAC-Address Port Type Index
0000.0000.0001 1/1 Dynamic NA
0000.0000.0002 1/1 Dynamic NA
In the above example, since both MAC address entries are flow-based and are located on different
packet processors (hardware index), the Index field displays NA (not applicable).
Syntax: show mac
Increasing the capacity of the MAC address table (optional)
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