Configuring a Layer 3 Link Aggregration Group (LAG)

FastIron devices with Layer 3 images support Layer 3 LAGs, which are used for routing and not switching. For details on how to create a LAG, refer to Link Aggregation in the Brocade FastIron Platform and Layer 2 Switching Configuration Guide. Perform the following steps to enable routing on a LAG:

In the global configuration mode, run the interface ethernet command to enter the interface configuration mode of the primary port of the LAG.
```
Brocade(config)# interface ethernet 4/1/4
```
Run the route-only command to disable switching and enable routing on the LAG.
```
Brocade(config-if-e1000-4/1/4)# route-only
```
Run the ip address command to assign an IP address for the LAG.
```
Brocade(config-if-e1000-4/1/4)# ip address 25.0.0.2/24
```

The following example shows the creation and deployment of a dynamic LAG that is used for routing on a FastIron device with Layer 3 image.

Brocade(config)# lag “brocade-LAG” dynamic id 55
Brocade(config-lag- brocade-LAG)# ports ethernet 1/1/1 ethernet 2/1/3 ethernet 3/1/4 ethernet 4/1/4
Brocade(config-lag- brocade-LAG)# primary-port 4/1/4
Brocade(config-lag- brocade-LAG)# deploy               
Brocade(config-lag- brocade-LAG)# exit
Brocade(config)# interface ethernet 4/1/4           
Brocade(config-if-e1000-4/1/4)# route-only
Brocade(config-if-e1000-4/1/4)# ip address 25.0.0.2/24

Contents

Configuring a Layer 3 Link Aggregration Group (LAG)