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Physical Interfaces for Aggregated Ethernet Interfaces

Learn about physical interface association with an aggregated Ethernet interface (aex). An aex groups multiple physical Ethernet links into a single logical and high-bandwidth connection.

Physical Interfaces Overview

You associate a physical interface with an aggregated Ethernet interface. Doing so associates the physical child links with the logical aggregated parent interface to form a LAG. You must also specify the constituent physical links by including the 802.3ad configuration statement.

A physical interface can be added to any aex as long as all member links have the same link speed and the maximum number of member links does not exceed 16. The aex instance number aex can be from 0 through 127, for a total of 128 aggregated interfaces.

Keep the following guidelines in mind about physical interfaces:

  • If you specify a link associated with an aex to an aex, the link is removed from the previous interface.

  • If you specify (on purpose or accidentally) that a link already associated with an aex be associated with another aex, the link is removed from the previous interface (there is no need for you to explicitly delete it) and it is added to the other one.

  • If a link in the bundle goes down in an aggregated interface with one or more ports on SRX380 devices, the traffic is rerouted two seconds later. The inactive link causes an outage for the traffic being sent to the link until reroute is complete.

Example: Associate Physical Interfaces with Aggregated Ethernet Interfaces

This example shows how to associate physical interfaces with aggregated Ethernet interfaces.

Requirements

Before you begin, set the number of aggregated Ethernet interfaces on the device. See Example: Configuring the Number of Aggregated Ethernet Interfaces on a Device.

Overview

In this example, you associate the physical child link of the ge-1/0/0 and ge-2/0/0 physical interfaces with the logical aggregate parent, ae0, thereby creating a LAG. Similarly, you create a LAG that associate the ge-3/0/0, ge-3/0/1, and ge-4/0/1 physical interfaces with the ae1 aggregated Ethernet interface.

Configuration

Procedure

Step-by-Step Procedure

To associate physical interfaces with aggregated Ethernet interfaces:

  1. Create the first LAG.

  2. Create the second LAG.

  3. If you are done configuring the device, commit the configuration.

Verification

To verify the configuration is working properly, enter the show interfaces command.