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Configuring Aggregated Ethernet Links (CLI Procedure)

 

Use the link aggregation feature to aggregate one or more links to form a virtual link or link aggregation group (LAG). The MAC client can treat this virtual link as if it were a single link to increase bandwidth, provide graceful degradation as failure occurs, and increase availability.

Note

An interface with an already configured IP address cannot form part of the aggregation group.

For Junos OS Evolved, when a new interface is added as a member to the aggregated Ethernet bundle, a link flap event is generated. When you add an interface to the bundle, the physical interface is deleted as a regular interface and then added back as a member. During this time, the details of the physical interface are lost.

To configure aggregated Ethernet interfaces, using the CLI:

  1. Specify the number of aggregated Ethernet interfaces to be created:
    [edit chassis]

    user@switch# set aggregated-devices ethernet device-count number
  2. Specify the link speed for the aggregated Ethernet bundle:
    [edit interfaces]

    user@switch# set ae0 aggregated-ether-options link-speed speed
  3. Specify the members to be included within the aggregated Ethernet bundle. To avoid commit errors, you must first delete the interfaces added in LACP from the RTSP configuration before specifying the members to be included to the aggregated Ethernet bundle.
    [edit interfaces]

    user@switch# set xe-fpc/pic/port ether-options 802.3ad ae0

    user@switch# set xe-fpc/pic/port ether-options 802.3ad ae0
  4. Specify an interface family for the aggregated Ethernet bundle:
    [edit interfaces]

    user@switch# set ae0 unit 0 family inet address address
  5. (Optional) Specify the minimum number of links for the aggregated Ethernet interface (aex), that is, the defined bundle, to be labeled up:Note

    By default, only one link must be up for the bundle to be labeled up.

    [edit interfaces]

    user@switch# set ae0 aggregated-ether-options minimum-links number

For information about adding LACP to a LAG, see Configuring Aggregated Ethernet LACP (CLI Procedure).