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Updated:December 13, 2018
The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
By default, the SF/SG 300 Series Managed Switch operates in Layer 2 mode. In this mode, the switch uses hardware to make forwarding decisions based on the MAC address information in a frame. In Layer 3 mode, the switch analyzes only the IP header segment of a frame using hardware, as opposed to a router analyzing the entire packet with software. A switch operating in Layer 3 mode has low latency, and can be a replacement for other routers with similar throughput. If you would like to know more about the Layer 3 switch evolution, click here.
The objective of this document is to show you how to enable Layer 3 Mode on the SF/SG 300 Series Managed Switch using the graphical user interface (GUI) and command line interface (CLI).
SF/SG 300 Series Managed Switches
Switching to Layer 3 Mode using the GUI
Step 1. Log into the web configuration utility and choose Administration > System Settings. The System Settings page appears.
Step 2. In the System Mode field, select either the L2 or L3 radio button to select which mode the switch will run in. L2 stands for Layer 2 (Data-Link). L3 stands for Layer 3 (Network). The default is L2.
Note: Layer 2 (Data-Link) forwards data based on MAC addresses. Layer 3 (Network) adds a level of intelligence usually found in routers and the ability to route data using IP addresses.
Step 3. Click Apply.
Step 4. A pop-up window will appear warning that changing the system mode will cause the switch to automatically reboot itself, and erase the startup configuration file in process. Click OK to proceed; the switch will reboot.
Switching to Layer 3 mode using CLI
To set the switch to layer 3 mode, use the following command,