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show bridge mac-table

date_range 22-Feb-25

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Syntax

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show bridge mac-table
<age>
<brief | count | detail | extensive>
<bridge-domain (all | bridge-domain-name)>
<global-count>
<instance instance-name>
<interface interface-name>
<mac-address>
<instance instance-name>
<vlan-id (all-vlan | vlan-id)>

Description

(MX Series routers only) Display Layer 2 MAC address information.

Options

none	Display all learned Layer 2 MAC address information.
age	(Optional) Display age of a single mac-address.
brief \| count \| detail \| extensive	(Optional) Display the specified level of output.
bridge-domain (all \| `bridge-domain-name`)	(Optional) Display learned Layer 2 MAC addresses for all bridging domains or for the specified bridging domain.
global-count	(Optional) Display the total number of learned Layer 2 MAC addresses on the system.
instance `instance-name`	(Optional) Display learned Layer 2 MAC addresses for the specified routing instance.
interface `interface-name`	(Optional) Display learned Layer 2 MAC addresses for the specified interface.
`mac-address`	(Optional) Display the specified learned Layer 2 MAC address information.
vlan-id (all-vlan \| `vlan-id`)	(Optional) Display learned Layer 2 MAC addresses for all VLANs or for the specified VLAN.

Additional Information

When Layer 2 protocol tunneling is enabled, the tunneling MAC address 01:00:0c:cd:cd:d0 is installed in the MAC table. When the Cisco Discovery Protocol (CDP), Spanning Tree Protocol (STP), or VLAN Trunk Protocol (VTP) is configured for Layer 2 protocol tunneling on an interface, the corresponding protocol MAC address is installed in the MAC table.

Required Privilege Level

view

Output Fields

Table 1 describes the output fields for the show bridge mac-table command. Output fields are listed in the approximate order in which they appear.

Table 1: show bridge mac-table Output Fields
Field Name	Field Description
Age	Age of a single mac-address.
`Routing instance`	Name of the routing instance.
Bridging domain	Name of the bridging domain.
MAC address	MAC address or addresses learned on a logical interface.
MAC flags	Status of MAC address learning properties for each interface: `S`—Static MAC address is configured. `D`—Dynamic MAC address is configured. `L`—Locally learned MAC address is configured. `C`—Control MAC address is configured. `SE`—MAC accounting is enabled. `NM`—Non-configured MAC. `R`—Remote PE MAC address is configured. `P`—MAC Pinned interface is configured
GBP TAG	Assigned Group Based Policy (GBP) tag ID (a value from 1 through 65535).
Logical interface	Name of the logical interface.
MAC count	Number of MAC addresses learned on the specific routing instance or interface.
Learning interface	Name of the logical interface on which the MAC address was learned.
Learning VLAN	VLAN ID of the routing instance or bridge domain in which the MAC address was learned.
VXLAN ID/VXLAN	VXLAN Network Identifier (VNI).
Layer 2 flags	Debugging flags signifying that the MAC address is present in various lists.
Epoch	Spanning Tree Protocol epoch number identifying when the MAC address was learned. Used for debugging.
Sequence number	Sequence number assigned to this MAC address. Used for debugging.
Learning mask	Mask of the Packet Forwarding Engines where this MAC address was learned. Used for debugging.
IPC generation	Creation time of the logical interface when this MAC address was learned. Used for debugging.

Sample Output

show bridge mac-table
show bridge mac-table (with Layer 2 Services over GRE Interfaces)
show bridge mac-table (with VXLAN enabled)
show bridge mac-table (With GBP Tag)
show bridge mac-table age (for GE interface)
show bridge mac-table age (for AE interface)
show bridge mac-table count
show bridge mac-table detail
show bridge mac-table instance pbb-evpn
show bridge mac-table