Displays the MAC entries that are learned on the specified port or group of ports or for all ports on the switch along with the aging time of each port.
| all | Specifies all ports |
| port_list | Specifies one or more ports or slots and ports. |
N/A.
If a port is down, the command displays all of the MAC entries that are maintained locally in the software.
The MAC entries learned on the specified port are displayed only if the MAC lock down timeout feature is enabled on the port. If you specify a port on which this feature is disabled, the MAC entries learned on that port are not displayed.
Mac—The MAC address that defines the entry.
Vlan—The VLAN (Virtual LAN) name and ID for the entry.
Age—The age of the entry, in seconds.
B—Egress Blackhole.
b—Ingress Blackhole.
F—Entry in the hardware FDB (forwarding database).
L—Entry in the software.
Port—The port on which the MAC address has been learned.
The following command displays information about the MAC address lock down timeout settings for ports 2:3 and 2:4:
show mac-lockdown-timeout fdb ports 2:3, 2:4
The following is sample output from this command:
Mac Vlan Age Flags Port ---------------------------------------------------- 00:00:01:02:03:04v1(4094)0010F2:3 00:00:01:00:00:02v1(4094)0030FB b2:3 00:00:0A:02:03:04v2(4093)0050L2:4 00:00:0B:02:03:04v2(4093)0090F2:4 Flags : (F) Entry as in h/w FDB, (L) Entry in s/w and not in h/w (B) Egress Blackhole, (b) Ingress Blackhole Total: 4 Entries in FDB: 3Entries in s/w: 1
This command was first available in ExtremeXOS 11.6.
This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.
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