Contents
What is a Layer 3 VLAN?
The Layer 3 switching function needs a virtual interface connected to each VLAN internal to the switch. These VLAN interfaces act like router interfaces, with an IP address and mask. The Layer 3 switch has an IP routing table, with connected routes off each of these VLAN interfaces.
What is inter VLAN routing on a Layer 3 switch?
SVI is a logical interface on a multilayer switch that provides layer 3 processing for packets to all switch ports associated with that VLAN. A single SVI can be created for a VLAN.
Can a Layer 3 switch Do NAT?
If the device has the functionality you need, then it should be fine to use. For instance, a layer 3 switch generally won’t do NAT or have ports suitable for connection to a WAN.
Can layer 3 switch do routing?
Since VLANs exist in their own layer 3 subnet, routing will need to occur for traffic to flow in between VLANs. This is where a layer 3 switch can be utilized. A Layer 3 switch is basically a switch that can perform routing functions in addition to switching.
What kind of VLAN is a catalyst 3560 switch?
A dynamic-access port can belong to one VLAN (VLAN ID 1 to 4094) and is dynamically assigned by a VMPS. The VMPS can be a Catalyst 5000 or Catalyst 6500 series switch, for example, but never a Catalyst 3560 switch.
When to use transparent mode in Cisco Catalyst 3560?
In VTP versions 1 and 2, the switch must be in VTP transparent mode when you create extended-range VLANs (VLANs with IDs from 1006 to 4094), but these VLANs are not saved in the VLAN database. VTP version 3 supports extended-range VLANs in VTP server and transparent mode.
How to configure intervlan routing with Cisco Catalyst 3750 / 3560?
This document explains how to configure interVLAN routing with Cisco Catalyst 3750/3560/3550 series switches. The document provides a sample configuration for interVLAN routing with a Catalyst 3550 series switch that runs enhanced multilayer image (EMI) software in a typical network scenario.
How does the switch route traffic between VLANs?
The switch can route traffic between VLANs by using switch virtual interfaces (SVIs). An SVI must be explicitly configured and assigned an IP address to route traffic between VLANs. For more information, see the “Switch Virtual Interfaces” section on page 11-5 and the “Configuring Layer 3 Interfaces” section on page 11-25.