Get a Quote     (408) 943-4100   TrueNAS Discord VendOp_Icon_15x15px Enterprise Support
TrueNAS.com Software Systems Company Community Security iX Portal Download
TrueNAS Enterprise TrueNAS SCALE TrueNAS CORE Compare Editions TrueCommand Software Status FreeNAS
Compare Systems F-Series M-Series H-Series R-Series Mini Series
Contact Us iXsystems Careers Clients Reviews
TrueNAS GitHub Community Forum Discord TrueNAS Merch Store
Use Cases Analytics Backup and Archival Cloud Data Mobility File Sharing iX Storj Media Creation Surveillance Virtualization
Industry Education Government Healthcare Research / AI / ML Media & Entertainment
Enterprise Support Community Support Documentation TrueNAS Security FAQ ZFS Overview
TrueNAS Blog Solution Guides Datasheets Case Studies Videos TrueCommand Cloud
Download TrueNAS SCALE Download TrueNAS CORE Get TrueNAS Enterprise Compare TrueNAS Editions Contact an Enterprise Specialist
  1. TrueNAS CORE
  2. /
  3. Configuration Tutorials
  4. /
  5. Network
  6. /
  7. Interfaces
  8. /
  9. Setting Up Link Aggregations
Edit page
TrueNAS CORETrueNAS CORE Version Documentation
This content follows the TrueNAS CORE 13.0 releases. Use the Product and Version selectors above to view content specific to different TrueNAS software or major version.

Setting Up Link Aggregations

  3 minute read.

A Link Aggregation (LAGG) is a general method of combining (aggregating) many network connections. The connections are either parallel or in series. This provides extra bandwidth or redundancy for critical networking situations. TrueNAS uses lagg(4) to manage LAGGs.

To set up a LAGG interface, go to Network > Interface > Add.

NetworkInterfacesAddLAGG

Set the Type to Link Aggregation.

Enter a name for the interface. The name must use the format laggX, where X is a number representing a non-parent interface. Enter any notes or reminders about this particular LAGG in the Description field.

Go to LAGG Settings and then Lagg Protocol to configure the interface ports to match your networking needs:

The most commonly used LAGG protocol. It is one part of IEEE specification 802.3ad. LACP mode performs negotiation with the network switch to form a group of ports. These are all active at the same time. The network switch must support LACP for this option to function.
Failover sends traffic through the primary interface of the group. Traffic diverts to the next available interface in the LAGG if the primary is not accessible.
Load Balance accepts inbound traffic on any port of the LAGG group. It then balances the outgoing traffic on the active ports in the LAGG group. It is a static setup that does not watch the link state nor does it negotiate with the switch.
Round robin accepts inbound traffic on any port of the LAGG group. It sends outbound traffic using a round robin scheduling algorithm. The outbound traffic sends in sequence, using each LAGG interface in turn.
This mode disables traffic on the LAGG interface without disabling the LAGG interface.

Now define the Lagg Interfaces and review the remaining interface options.

See Interfaces Screen for more information on settings.

Other Settings

Every kind of network interface has common settings:

NetworkInterfacesAddOtherSettings

Disabling Hardware Offloading can reduce network performance. It is not recommended.

Disabling this option is sometimes necessary. For example, when the interface is managing jails, plugins, or virtual machines.

MTU stands for maximum transmission unit. It is the largest protocol unit for transferring data. MTU size varies. Physical hardware and available network interfaces determine the largest workable MTU size. 1500 and 9000 are standard Ethernet MTU sizes. The recommendation is to use the default 1500. The permissible range of MTU values is 1492-9216. Leaving this field blank sets the default value of 1500.

You can enter more tuning ifconfig settings in the Options.

IP Addresses

Additional aliases for the interface can also be defined:

NetworkInterfacesAddIpAddresses

It is possible to define either IPv4 or IPv6 addresses and subnets from 1-32. Clicking Add provides another field for defining an IP address.

Related Content

Related Articles

    Have more questions or want to discuss your specific configuration? For further discussion or assistance, see these resources:

    Found content that needs an update? You can suggest content changes directly! To request changes to this content, click the Feedback button located on the middle-right side of the page (might require disabling ad blocking plugins).