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Using Static Multicast MAC Addresses Managing Source Learning
page 2-6 OmniSwitch 6600 Family Network Configuration Guide April 2006
Static MAC Addresses on Link Aggregate Ports
Static MAC Addresses are not assigned to physical ports that belong to a link aggregate. Instead, they are
assigned to a link aggregate ID that represents a collection of physical ports. This ID is specified at the
time the link aggregate of ports is created and when using the mac-address-table command.
To configure a permanent, bridging static MAC address on a link aggregate ID, enter mac-address-table
followed by a MAC address, then linkagg followed by the link aggregate ID, and the VLAN ID to assign
to the MAC address. For example, the following assigns a MAC address to link aggregate ID 2 associated
with VLAN 455:
-> mac-address-table 00:95:2A:00:3E:4C linkagg 2 455
For more information about configuring a link aggregate of ports, see Chapter 12, “Configuring Static
Link Aggregation” and Chapter 13, “Configuring Dynamic Link Aggregation.”
Using Static Multicast MAC Addresses
Using static multicast MAC addresses allows you to send traffic intended for a single destination multi-
cast MAC address to multiple switch ports within a given VLAN. A static multicast address is assigned to
one or more switch ports for a given VLAN. The ports associated with the multicast address are then iden-
tified as egress ports. When traffic received on ports within the same VLAN is destined for the multicast
address, the traffic is forwarded on the egress ports that are associated with the multicast address.
When defining a static multicast MAC address for a particular port and VLAN, consider the following:
• Configuring static multicast addresses is only supported on non-mobile ports.
• The specified port or link aggregate ID must already belong to the specified VLAN. Use the
vlan port default command to assign a port or link aggregate to a VLAN before you configure the
static multicast address.
• If a packet received on a port associated with the same VLAN contains a source address that matches a
static MAC address, the packet is discarded. The same source address on different ports within the
same VLAN is not supported.
Configuring Static Multicast MAC Addresses
The mac-address-table static-multicast command is used to define a destination multicast MAC address
and assign the address to one or more egress ports within a specified VLAN. For example, the following
command assigns the multicast address 01:25:9a:5c:2f:10 to port 1/24 in VLAN 20:
-> mac-address-table static-multicast 01:25:9a:5c:2f:10 1/24 20
Note that in the above example the specified MAC address begins with 01. This value is a prefix that iden-
tifies the address as a multicast MAC address. If this prefix is not present, then the address is treated as a
regular MAC address and not allowed when using the mac-address-table static-multicast command.
To assign a multicast address to more than one port, enter a range of ports and/or multiple port entries on
the same command line separated by a space. For example, the following command assigns the multicast
address 01:25:9a:5c:2f:10 to port 1/24 and ports 2/1 through 2/6 in VLAN 20:
-> mac-address-table static-multicast 01:25:9a:5c:2f:10 1/24 2/1-6 20