Brocade Communications Systems ICX 7250 series, Configuration Manual

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Enabling or disabling Layer 2 switching
By default, Brocade Layer 3 switches support Layer 2 switching. These devices modify the routing protocols that are not supported on
the devices. If you want to disable Layer 2 switching, you can do so globally or on individual ports, depending on the version of software
your device is running.
NOTE
Consult your reseller or Brocade to understand the risks involved before disabling all Layer 2 switching operations.
Configuration notes and feature limitations for Layer 2 switching
• Enabling or disabling Layer 2 switching is supported in Layer 3 software images only.
• Brocade ICX devices support disabling Layer 3 switching at the interface configuration mode as well as the global configuration
mode.
• Enabling or disabling Layer 2 switching is not supported on virtual interfaces.
Command syntax for Layer 2 switching
To globally disable Layer 2 switching on a Layer 3 switch, enter commands such as the following.
device(config)#route-only
device(config)#exit
device#write memory
device#reload
To re-enable Layer 2 switching on a Layer 3 switch, enter the following commands.
device(config)#no route-only
device(config)#exit
device#write memory
device#reload
Syntax: [no] route-only
To disable Layer 2 switching only on a specific interface, go to the interface configuration level for that interface, and then disable the
feature. The following commands show how to disable Layer 2 switching on port 2.
device(config)#interface ethernet 2
device(config-if-e1000-2)#route-only
Configuring a Layer 3 Link Aggregration Group (LAG)
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:
1. 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
Enabling or disabling Layer 2 switching
Brocade FastIron Layer 3 Routing Configuration Guide
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