MFDB Table

Use the MFDB Table page to view the port membership information for all active multicast address entries. The key for an entry consists of a VLAN ID and MAC address pair. Entries may contain data for more than one protocol.

To access this page, click Switching > Multicast Forwarding Database > Summary in the navigation menu.

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MFDB Summary Fields

Field Description
MAC Address The VLAN ID (the first two groups of hexadecimal digits) and multicast MAC address (the last six groups of hexadecimal digits) that has been added to the MFDB.
Component The feature on the device that was responsible for adding the entry to the multicast forwarding database, which is one of the following:
  • IGMP Snooping: A Layer 2 feature that allows the device to dynamically add or remove ports from IPv4 multicast groups by listening to IGMP (Internet Group Management Protocol) join and leave requests.
  • MLD Snooping: A Layer 2 feature that allows the device to dynamically add or remove ports from IPv6 multicast groups by listening to MLD join and leave requests.
  • GMRP: Generic Address Resolution Protocol (GARP) Multicast Registration Protocol, which helps help control the flooding of multicast traffic by keeping track of group membership information.
  • Static Filtering: A static MAC filter that was manually added to the address table by an administrator.
Type The type of entry, which is one of the following:
  • Static: The entry has been manually added to the MFDB by an administrator.
  • Dynamic: The entry has been added to the MFDB as a result of a learning process or protocol.
Description A text description of this multicast table entry.
Interface(s) The list of interfaces that will forward or filter traffic sent to the multicast MAC address.
Forwarding Interface(s) The list of forwarding interfaces. This list does not include any interfaces that are listed as static filtering interfaces.