Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 23)

MAC address learning configuration notes and feature limitations
• This command is not available on virtual routing interfaces. Also, if this command is configured on the
primary port of a trunk, MAC address learning will be disabled on all the ports in the trunk.
• Entering the mac-learn-disable command on tagged ports disables MAC learning for that port in all
VLANs to which that port is a member. For example, if tagged port 3/1 is a member of VLAN 10, 20,
and 30 and you issue the mac-learn-disable command on port 3/1, port 3/1 will not learn MAC
addresses, even if it is a member of VLAN 10, 20, and 30.
Displaying the MAC address table
To display the MAC table, enter the show mac-address command.
device#show mac-address
Total active entries from all ports = 3
Total static entries from all ports = 1
MAC-Address Port Type VLAN
0000.0034.1234 15 Static 1
0000.0038.2f24 14 Dynamic 1
0000.0038.2f00 13 Dynamic 1
0000.0086.b159 10 Dynamic 1
In the output of the show mac-address command, the Type column indicates whether the MAC entry is
static or dynamic. A static entry is one you create using the static-mac-address command. A dynamic
entry is one that is learned by the software from network traffic.
The output of the show mac-addres s command on FSX devices include an Index column which
indicates the index where the entry exists in the hardware MAC table.
NOTE
The show mac-address command output does not include MAC addresses for management ports,
since these ports do not support typical MAC learning and MAC-based forwarding.
Static MAC entry configuration
Static MAC addresses can be assigned to Brocade devices.
NOTE
Brocade devices running Layer 3 code also support the assignment of static IP Routes, static ARP, and
static RARP entries. For details on configuring these types of static entries, refer to "Adding a static IP
route" and "Adding a static ARP entry" sections in the FastIron Ethernet Switch Layer 3 Routing
Configuration Guide .
You can manually input the MAC address of a device to prevent it from being aged out of the system
address table.
This option can be used to prevent traffic for a specific device, such as a server, from flooding the
network with traffic when it is down. Additionally, the static MAC address entry is used to assign higher
priorities to specific MAC addresses.
You can specify traffic priority (QoS) and VLAN membership (VLAN ID) for the MAC Address as well as
specify the device type of either router or host.
MAC address learning configuration notes and feature limitations
FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide 23
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