How to configure Link Aggregation
08/17/2021 179 People found this article helpful 107,501 Views
Link Aggregation provides the ability to group multiple Ethernet interfaces to form a trunk which looks and acts like a single physical interface. This feature is useful for high end deployments requiring more than 1 Gbps throughput for traffic flowing between two interfaces. This functionality is available on all NSa, NSA and SuperMassive platforms.
Static Link Aggregation with the ability to aggregate up to 4 ports into a single link is supported on SonicOS 6.x. A round-robin algorithm is used for load balancing traffic across the interfaces in an aggregated link.
Dynamic Link Aggregation (LACP) has been introduced on SonicOS 6.5 .
Link Aggregation is based on interface link speed, for example: 10 Gbps port cannot be link aggregated with another interface which does not support 10 Gbps. Any port which are link aggregated together should support same link speed.
Link Aggregation is used to increase the available bandwidth between the firewall and a switch by aggregating up to four interfaces into a single aggregate link, referred to as a Link Aggregation Group (LAG). All ports in an aggregate link must be connected to the same switch. The firewall uses a round-robin algorithm for load balancing traffic across the interfaces in a Link Aggregation Group. Link Aggregation also provides a measure of redundancy, in that if one interface in the LAG goes down, the other interfaces remain connected.
Link Aggregation is referred to using different terminology by different vendors, including Port Channel, Ether Channel, Trunk, and Port Grouping.
Link Aggregation Limitations
Link Aggregation only works with unassigned interfaces. SonicOS 6.5 introduces support for Dynamic Link Aggregation using Link Aggregation Control Protocol (LACP).
- This feature is supported on all 1 Gbit and 2.5 Gbit interfaces on SuperMassive and NSA platforms. However it's not supported on the 10 Gbit interfaces of our NSA x600 appliances and Supermassive 9x00 appliances. (x stand for the model of the appliance)
- The feature is not supported on platforms which do not support Advanced Switching features, including SOHOW, TZ300/W, TZ400/W, TZ500/W ,TZ600 and NSA 2600.
- LACP only works with interfaces connected to the internal SonicWall switch.
- No limitations for Gen 6.5 NSa 2650 to 9650.
Please reference to the table below:
|Firewall ||Ports connected to the internal SonicWall switch |
|NSA 2600 ||UNSUPPORTED feature |
|NSA 3600 ||X17* only (LACP not supported) |
|NSA 4600 ||X17* only (LACP not supported) |
|NSA 5600 ||X17* only (LACP not supported) |
|NSA 6600 ||X16, X18, X19 |
|SM 9200 ||X16, X18, X19 |
|SM 9400 ||X16, X18, X19 |
|SM 9800 ||X16, X18, X19 |
NOTE: Please refer to page 27 of SonicOS 18.104.22.168 release notes for more information on Dynamic LAG Using LACP.
Link Aggregation is configured on the Network | Interface page, edit the interface. On the Advance tab is the Redundant/Aggregate port dropdown that allows link aggregation. Then select the check boxes next to the other interfaces to aggregate with.
Resolution for SonicOS 6.5
This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.
Link Aggregation is configured on the Manage | Network | Interfaces page, edit the interface. On the Advance tab is the Redundant/Aggregate port dropdown that allows link aggregation. Then select the check boxes next to the other interfaces to aggregate with.