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lacp (Aggregated Ethernet)

 

Syntax (T, PTX, MX Series)

Hierarchy Level ( PTX, MX Series)

Release Information

Statement introduced before Junos OS Release 7.4.

Statement introduced in Junos OS Release 15.1F4 for PTX Series routers.

fast-failover option introduced in Junos OS Release 12.2.

Support for logical systems introduced in Junos OS Release 14.1.

Description

Configure the Link Aggregation Control Protocol (LACP) for aggregated Ethernet interfaces only.

When you configure the accept-data statement at the [edit interfaces aeX aggregated-ether-options lacp] hierarchy level, the router processes packets received on a member link irrespective of the LACP state if the aggregated Ethernet bundle is up.

Note

When you configure the accept-data statement at the [edit interfaces aeX aggregated-ether-options lacp] hierarchy level, this behavior occurs:

  • By default, the accept-data statement is not configured when LACP is enabled.

  • You can configure the accept-data statement to improve convergence and reduce the number of dropped packets when member links in the bundle are enabled or disabled.

  • When LACP is down and a member link receives packets, the router or switch does not process packets as defined in the IEEE 802.1ax standard. According to this standard, the packets should be dropped, but they are processed instead because the accept-data statement is configured.

Default

If you do not specify LACP as either active or passive, LACP remains passive.

Options

activeInitiate transmission of LACP packets.
admin-key numberSpecify an administrative key for the router or switch.
Note

You must also configure multichassis link aggregation (MC-LAG) when you configure the admin-key.

fast-failoverSpecify to override the IEEE 802.3ad standard and allow the standby link to receive traffic. Overriding the default behavior facilitates subsecond failover.
passiveRespond to LACP packets.

The remaining statements are explained separately. See CLI Explorer.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.