Converting an interface to a link aggregate (LACP)

This feature is only available on SN510, SN710, SN910, SN2000, SN2100, SN3000, SN3100, SN6000, SN6100, SNi20 and SNi40 models.

The LACP (IEEE 802.3ad - Link Aggregation Control Protocol) feature helps improve the firewall’s bandwidth while maintaining a high level of availability (link redundancy). Several physical ports on a firewall can be grouped together to be considered a single logical interface. Therefore, by aggregating x links, it will be possible to set up a link of x times 1 Gbps or 10 Gbps between two appliances.

NOTE
Ensure that the remote appliances are using LACP.

NOTE
The use of stackable switches is recommended as this would allow link redundancy between both appliances.

An interface that is already in use in the configuration cannot be converted in aggregate form.

An interface converted in aggregate form becomes a virtual interface, allowing aggregation to be viewed and configured. The physical interface of this converted interface then becomes similar to any other interface added to the aggregate. These members are called “aggregated links”.

An interface converted in aggregate form keeps its settings. The converted interface will then have an additional tab called “Link aggregation (LACP)”. On the other hand, an interface that becomes an aggregate link loses its settings to inherit the configuration of the aggregate (except the name and Media settings).

Depending on the extension modules installed, the maximum possible aggregate is half of the total number of interfaces on the model. The maximum number of interfaces that can be grouped in an aggregate is 8, regardless of the model.

There are two ways to create an aggregate:

  • Creating an aggregate without members (e.g. preparing a configuration),
  • Creating an aggregate from a selection of interfaces.

Creating an aggregate without members

  1. Click on Add in the toolbar or right-click, then Add.
  2. Click on Aggregate, then on No members.
    The new aggregate will be added to the list of interfaces and its control panel appears.

Creating an aggregate containing selected interfaces

  1. Select the network interfaces to be included in the new bridge (interface_1, interface_2 in this example).
  2. Click on Add in the toolbar or right-click, then Add.
  3. Click on Aggregate then on With interface_1, interface_2 etc.
    The new aggregate will be added to the list of interfaces and its control panel appears.
    The interfaces selected to be members of this aggregate will be automatically attached.

The various fields in the control panel of the aggregate are explained in the section Modifying a link aggregate.