Displays FDB entries.
| blackhole | Displays the blackhole entries. (All packets addressed to these entries are dropped.) |
| slot | Specifies a slot in the switch. |
| num_entries | Specifies the maximum number of hardware entries to display. The range is 1 to 25. |
| netlogin all | Displays all FDBs created as a result of the netlogin process. |
| netlogin mac-based-vlans | Displays all netlogin
MAC-based VLAN FDB entries. Note: This parameter is supported only for Summit family switches,
SummitStack, and the BlackDiamond 8800 series switches. See
Network Login in the
ExtremeXOS
16.2 User Guide for more information on
netlogin.
|
| permanent | Displays all permanent entries, including the ingress and egress QoS profiles. |
| mac_addr | Specifies a MAC address, using colon-separated bytes, for which FDB entries should be displayed. |
| port_list | Displays the entries for one or more ports or ports and slots. |
| vlan_name | Displays the entries for a specific VLAN. |
| vlan_list | Displays a VLAN list of IDs. |
| vpls_name | Specifies a specific VPLS for which to display entries. |
All.
The pulling of MAC addresses for display purposes is given a lower priority to the actual data path learning. Eventually all the MAC addresses are learned in a quiescent system.
The show fdb command output displays the following information:
| Mac | The MAC address that defines the entry. |
| Vlan | The PVLAN or VLAN for the entry. |
| Age | The age of the entry, in seconds (does not appear if the keyword permanent is specified). The age parameter does not display for the backup MSM/MM on modular switches.On BlackDiamond 8900 xl-series and Summit X480 switches, the Age is always 000 and the h flag is set for entries that are hardware aged. |
| Flags | Flags that define the type of
entry:
|
| Port List | The ports on which the MAC address has been learned. |
The following example shows how the FDB entries appear for all options except the hardware option:
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Mac Vlan Age Flags Port / Virtual Port List
-----------------------------------------------------------------------------
00:0c:29:4b:34:cf v101(0101) 0041 d m D 1:2
00:0c:29:4b:34:cf v100(0100) 0041 d m P 1:2
00:0c:29:d2:2d:48 v102(0102) 0045 d m 1:3
00:0c:29:d2:2d:48 v100(0100) 0045 d m P 1:3
00:0c:29:f1:f2:f5 v100(0100) 0045 d m 1:1
00:0c:29:f1:f2:f5 v102(0102) 0045 d m P 1:1
00:0c:29:f1:f2:f5 v101(0101) 0045 d m P 1:1
Flags : d - Dynamic, s - Static, p - Permanent, n - NetLogin, m - MAC, i - IP,
x - IPX, l - lockdown MAC, L - lockdown-timeout MAC, M- Mirror, B - Egress
Blackhole,
b - Ingress Blackhole, v - MAC-Based VLAN, P - Private VLAN, T - VLAN
translation,
D - drop packet, h - Hardware Aging, o - IEEE 802.1ah Backbone MAC.
Total: 3 Static: 0 Perm: 0 Dyn: 3 Dropped: 0 Locked: 0 Locked with Timeout: 0
FDB Aging time: 300
FDB VPLS Aging time: 300
The following example output shows where the port tag is displayed in parentheses:
# show fdb
Mac Vlan Age Flags Port / Virtual Port List
-----------------------------------------------------------------------------
00:00:00:00:04:0a test(0200) 0057 d m 3(0010)
00:00:00:00:04:0b test(0200) 0300 d m 3(0011)
00:01:02:03:04:05 test(0200) 0000 spm 3(0010)
Flags : d - Dynamic, s - Static, p - Permanent, n - NetLogin, m - MAC, i - IP,
x - IPX, l - lockdown MAC, L - lockdown-timeout MAC, M- Mirror, B - Egress
Blackhole,
b - Ingress Blackhole, v - MAC-Based VLAN, P - Private VLAN, T – VLAN translation,
D - drop packet, h - Hardware Aging, o - IEEE 802.1ah Backbone MAC.
Total: 3 Static: 0 Perm: 0 Dyn: 3 Dropped: 0 Locked: 0 Locked with Timeout: 0
FDB Aging time: 300
FDB VPLS Aging time: 300
This command was first available in ExtremeXOS 10.1.
The stats and netlogin parameters were first available in ExtremeXOS 11.3.
The blackhole output under the b and B flags was first available for all platforms in ExtremeXOS 12.1.
The o flag was first available in ExtremeXOS 12.4.
The vlan_list variable was added in ExtremeXOS 16.1.
This command is available on all platforms.