Displays FDB (forwarding database) entry statistics for the specified ports or VLANs in either a dynamic or a static report.
| all | Requests statistics for all ports or all VLANs. |
| port_list | Specifies which ports are to be included in the statistics display. |
| vlan_name | Specifies a single VLAN (Virtual LAN) to be included in the statistics display. |
| vlan_list | Specifies a VLAN list of IDs to be included in the statistics display. |
| refresh | Specifies a continuous refresh of output. |
Summary FDB statistics for the switch.
The dynamic display remains visible and continues to update until you press [Esc].
The show fdb stats command output displays the following information:
| Port | When you chose to display statistics for ports, this column displays port numbers. |
| Link State | When you chose to display statistics for ports, this column displays the link states, which are described at the bottom of the display. |
| VLAN | When you chose to display statistics for VLANs, this column displays VLAN names. |
| MAC Addresses | This column displays the total number of MAC addresses for each port or VLAN. |
| Dynamic | This column displays the total number of MAC addresses that were learned dynamically for each port or VLAN. |
| Static | This column displays the total number of MAC addresses that are configured on this switch for each port or VLAN. |
| Dropped | This column displays the total number of dynamic MAC addresses that were discovered, but not stored in the FDB. Discovered MAC addresses might be dropped because a configured learning limit is reached, the FDB is in lockdown, or a port forwarding state is in transition. Some conditions that lead to dropped MAC addresses can produce log messages or SNMP (Simple Network Management Protocol) traps. |
The following command example displays summary FDB statistics for the switch:
torino1.1 # show fdb stats Total: 4 Static: 3 Perm: 3 Dyn: 1 Dropped: 0 FDB Aging time: 300 FDB VPLS Aging time: 300 torino1.2 #
The following command example displays FDB statistics for ports 1 to 16 on slot 1:
# show fdb stats ports 1:1-1:16 FDB Stats Mon Mar 15 15:30:49 2010 Port Link MAC State Addresses Dynamic Static Dropped ======================================================================= 1:1 A 2394 2389 5 2 1:2 A 37 37 0 0 1:3 A 122 121 1 452 1:4 R 0 0 0 0 1:5 R 0 0 0 0 1:6 A 43 43 0 0 1:7 A 118 118 0 0 1:8 R 0 0 0 0 1:9 R 0 0 0 0 1:10 A 8 8 0 0 1:11 A 2998 2990 8 1 1:12 A 486 486 0 0 1:13 R 0 0 0 0 1:14 A 42 42 0 0 1:15 A 795 795 0 0 1:16 A 23 23 0 2 ======================================================================= Link State: A-Active, R-Ready, NP-Port Not Present, L-Loopback U->page up D->page down ESC->exit
The following command example displays FDB statistics for all VLANs:
# show fdb stats vlan all FDB Stats Mon Mar 15 15:30:49 2010 VLAN MAC Addresses Dynamic Static Dropped ============================================================================= SV_PPPOE 2394 2389 5 2 NV_PPPOE 122 121 1 452 ============================================================================= U->page up D->page down ESC->exit
The dynamic display for this command was first available in ExtremeXOS 12.4.2.
The no-refresh keyword was removed in ExtremeXOS 16.1.
The vlan_list variable was added in ExtremeXOS 16.1.
The refresh keyword was added in ExtremeXOS 16.1.
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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