This command displays the Multicast Forwarding Database (MFDB) information. If you enter the command with no parameter, the entire table is displayed. You can display the table entry for one MAC Address by specifying the MAC address as an optional parameter.
| Format | show mac-address-table multicast macaddr |
| Mode | Privileged EXEC |
| VLAN ID | The VLAN in which the MAC address is learned. |
| MAC Address | A multicast MAC address for which the switch has forwarding or filtering information. The format is 6 two-digit hexadecimal numbers that are separated by colons, for example 01:23:45:67:89:AB. |
| Source | The component that is responsible for this entry in the Multicast Forwarding Database. The source can be IGMP (Internet Group Management Protocol) Snooping, GMRP, and Static Filtering. |
| Type | The type of the entry. Static entries are those that are configured by the end user. Dynamic entries are added to the table as a result of a learning process or protocol. |
| Description | The text description of this multicast table entry. |
| Interfaces | The list of interfaces that are designated for forwarding (Fwd:) and filtering (Flt:). |
| Fwd Interface | The resultant forwarding list is derived from combining all the component‘s forwarding interfaces and removing the interfaces that are listed as the static filtering interfaces. |
If one or more entries exist in the multicast forwarding table, the command output looks similar to the following:
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Fwd
VLAN ID MAC Address Source Type Description Interface Interface
------- ----------------- ------- ------- --------------- --------- ---------
1 01:00:5E:01:02:03 Filter Static Mgmt Config Fwd: Fwd:
1/0/1, 1/0/1,
1/0/2, 1/0/2,
1/0/3, 1/0/3,
1/0/4, 1/0/4,
1/0/5, 1/0/5,
1/0/6, 1/0/6,
1/0/7, 1/0/7,
1/0/8, 1/0/8,
1/0/9, 1/0/9,
1/0/10, 1/0/10,
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