Contents
What is command to know the switch port is Layer 3 or Layer 2?
Table 17-4 Chapter 17 Configuration Command Reference
| Command | Description |
|---|---|
| [no] switchport | Layer 3 switch subcommand that makes the port act as a Layer 2 port (switchport) or Layer 3 routed port (no switchport) |
What is the difference between Layer 2 and Layer 3 VLAN?
The most significant difference between Layer 2 and Layer 3 switch is the routing method. Layer 3 switch is capable of inter-VLAN routing and does not need additional device connected like router on-a-stick. However, Layer 3 switches also maintained a presence at many points within a corporate network.
What is the main difference between OSI layer 2 and 3?
Difference between layer-2 and layer-3 switches
| Layer 2 Switch | Layer 3 Swicth |
|---|---|
| Quite fast as they do not look at the Layer 3 portion of the data packets. | Takes time to examine data packets before sending them to their destination |
| It has single broadcast domain | It has multiple broadcast domain. |
What is Layer 2 switch and Layer 3 switch and show how it will be represented in Cisco?
Within the model, Layer 2 represents the “Data Link Layer” while Layer 3 represents the “Network Layer”. While the Layer 2 switch routes packets based on MAC, Layer 3 switches route data packets based on IP.
How do I convert SVI to layer 3 switch?
Layer 3 Switch Configuration (4.3. 3)
- Create the VLANs. First, create the two VLANs as shown in Example 4-13.
- Create the SVI VLAN interfaces. Configure the SVI for VLANs 10 and 20, as shown in Example 4-14.
- Configure access ports.
- Enable IP routing.
When to use a layer 3 switch?
Layer 3 switches use this capability when managing traffic within a LAN. They also expand on this traffic-handling process by using IP address information to make routing decisions when managing traffic between LANs. By contrast, Layer 4 switches also factor TCP or UDP port numbers.
Which is better router or Layer 3 switch?
L3 switch is generally a better approach for all but the smallest business. The reason is with router on a stick all vlans share the bandwidth of the physical interface whereas with a L3 switch you get the full switching capacity. Obviously L3 switches do not have the full feature support of routers. 02-13-2018 05:30 AM 02-13-2018 05:30 AM
What are the benefits of Layer 3 switching?
From the above discussion, the purpose/benefits of a layer 3 switch are to: Support routing between virtual LANs. Improve fault isolation. Simplify security management. Reduce broadcast traffic volumes. Ease the configuration process for VLANs, as a separate router isn’t required between each VLAN. Separate routing tables, and as a result, segregate traffic better.
Do I need a layer 2 or Layer 3 switch?
If you have a pure Layer 2 domain, you can simply go for Layer 2 switch; if you need to do inter-VLAN routing, then you need a Layer 3 switch. A pure Layer 2 domain is where the hosts are connected, so a Layer 2 switch will work fine there. This is usually called access layer in a network topology.