Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 24)

The default and maximum configurable MAC table sizes can differ depending on the device. To
determine the default and maximum MAC table sizes for your device, display the system parameter
values. Refer to
Displaying and modifying system parameter default settings on page 37.
Multi-port static MAC address
Many applications, such as Microsoft NLB, Juniper IPS, and Netscreen Firewall, use the same MAC
address to announce load-balancing services. As a result, a switch must be able to learn the same
MAC address on several ports. Multi-port static MAC allows you to statically configure a MAC address
on multiple ports using a single command.
Multi-port static MAC address configuration notes
• This feature is applicable for Layer 2 traffic.
• This feature can be used to configure unicast as well as IPv4 and IPv6 multicast MAC addresses on
one or more ports. However, when a multicast MAC address is configured, the corresponding MAC
address entry cannot be used for IGMP snooping. For IPv4 multicast addresses (range
0100.5e00.000 to 0100.5e7f.ffff) and IPv6 multicast addresses (range 3333.0000.0000 to
3333.ffff.ffff), use IGMP/MLD snooping. Other multicast addresses can also be configured on the
ports using this feature.
• FastIron devices support a maximum of 15 multi-port static MAC addresses.
• Hosts or physical interfaces normally join multicast groups dynamically, but you can also statically
configure a host or an interface to join a multicast group.
Configuring a multi-port static MAC address
For example, to add a static entry for a server with a MAC address of 0000.0063.67ff and a priority of
7, enter the following command.
device(config)#static-mac-address 0000.0063.67ff ethernet 4/2 ethernet 4/3 ethernet
4/4 priority 7
To specify a range of ports, enter the following command.
device(config)#static-mac-address 0000.0063.67ff ethernet 4/2 to 4/6 priority 7
Syntax: [no] static-mac-address mac-addr ethernet [ slotnum/]portnum ethernet [
slotnum/]portnum ethernet [ slotnum/]portnum....[ priority num ]
or
Syntax: [no] static-mac-address mac-addr ethernet [slotnum/]portnum to ethernet
[slotnum/]portnum [prioritynum]
The slotnum parameter is required on chassis devices.
The portnum parameter is a valid port number.
The priority num is optional and can be a value from 0 - 7 (0 is lowest priority and 7 is highest
priority). The default priority is 0.
VLAN-based static MAC entries configuration
You can configure a VLAN to drop packets that have a particular source or destination MAC address.
Multi-port static MAC address
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