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show interfaces mc-ae



On peers with multichassis aggregated Ethernet (mc-aeX) interfaces, use this command to display information about the multichassis aggregated Ethernet interfaces.


In Junos OS Release 17.4R1, this command is not supported on EX4300, EX9200, PTX10000, QFX10002, and QFX10008 devices.


id identifier

(Optional) Specify the name of the multichassis aggregated Ethernet interface.

unit number

(Optional) Specify the logical interface by unit number.

Required Privilege Level


Output Fields

Table 1 lists the output fields for the show interfaces mc-ae command. Output fields are listed in the approximate order in which they appear.

Table 1: show interfaces mc-ae Output Fields

Output Field Name

Field Description

Current State Machine’s State

Specifies the state of the MC-LAG initialization state machine.

Configuration Consistency Check

Specifies the status of the MC-LAG configuration consistency check feature. The status is either Passed or Failed. If the status is Failed, the system will display the name of the parameter that failed consistency check. If there are multiple inconsistencies, only the first inconsistency is shown. If the enforcement level for the MC-LAG parameter was mandatory, and you did not configure that parameter correctly, the command will show that the MC-LAG interface is down.

Member Link

Specifies the identifiers of the configured multichassis link aggregated interface members.

Local Status

Specifies the status of the local link: active or standby.

Peer Status

Specifies the status of the peer link: active or standby.

Peer State

Specifies the status of the local and peer links in an active/active MC-LAG configuration.

Logical Interface

Specifies the identifier and unit of the AE interface.

Topology Type

Specifies the bridge configured on the AE.

Local State

Specifies if the local device is up or down.

Peer State

Specifies if the peer device is up or down.

Peer Ip/MCP/State

Specifies the multichassis protection (MCP) link or the interchassis link-protection link (ICL-PL) for all of the multichassis aggregated Ethernet interfaces that are part of the peer.

Sample Output

show interfaces mc-ae (EX Series )

show interfaces mc-ae (MX Series)

show interfaces mc-ae (Active/Active Bridging and VRRP over IRB on MX Series)

Release Information

Command introduced in Junos OS Release 9.6.

Configuration Consistency Check output field added in Junos OS Release 15.1X53-D60 for the QFX Series.