Question: How Do I Connect A Layer 2 Switch To A Router?

Why does a Layer 2 switch need an IP address?

2 Answers.

An IP address on a true layer 2 only switch is used for management (accessing the CLI remotely, sending SNMP traps, logging, TACACS/RADIUS, etc.).

The IP address on the switch is in no way required for the switch to actually do its job, which is to switch frames..

What is a Layer 3 switch used for?

Simply put, a layer 3 switch combines the functionality of a switch and a router. It acts as a switch to connect devices that are on the same subnet or virtual LAN at lightning speeds and has IP routing intelligence built into it to double up as a router.

Are routers Layer 2 or 3?

Routing is a layer 3 function. Packet switching is a layer 2 function. If a router can packet switch as well as route, it is a layer 2 and layer 3 device.

Can a Layer 2 switch support VLANs?

You can configure one or more VLANs to perform Layer 2 bridging. Thus, MX Series routers or EX Series switches can function as Layer 2 switches, each with multiple bridging, or broadcast, domains that participate in the same Layer 2 network. You can also configure Layer 3 routing support for a VLAN.

How do I set up a Layer 2 switch?

Configuration RoadmapConfigure interface-based VLAN assignment on the switch for Layer 2 forwarding.Configure the router as the gateway of users to implement Layer 3 forwarding across network segments through sub-interfaces or VLANIF interfaces.Configure the router as the DHCP server to assign IP addresses to users.More items…

What does a Layer 2 switch do?

A layer 2 switch is a type of network switch or device that works on the data link layer (OSI Layer 2) and utilizes MAC Address to determine the path through where the frames are to be forwarded. It uses hardware based switching techniques to connect and transmit data in a local area network (LAN).

Do layer 2 addresses cross the router to other networks?

Physical Addressing and Switching Network is a group of devices connected to each other. On Layer 2, devices can communicate within a single network only. Layer 2 devices cannot span multiple networks, for multiple networks Layer 3 support is required.

What is the difference between a Layer 2 switch and a router?

Layer 2 Switch Vs Router A switch learns all the MAC addresses of all the hosts connected to it in order to pass traffic between hosts in Layer 2. Routers on the other hand allow us the ability to take different networks and pass traffic to one another in Layer 3.

What is the difference between a Layer 2 switch and a layer 3 switch?

The main difference between Layer 2 and Layer 3 is the routing function. A Layer 2 switch works with MAC addresses only and does not care about IP address or any items of higher layers. … A Layer 3 switch, or multilayer switch, can do all the job that a Layer 2 switch does.

Why use a switch over a router?

While a network switch can connect multiple devices and networks to expand the LAN, a router will allow you to share a single IP address among multiple network devices. In simpler terms, the Ethernet switch creates networks and the router allows for connections between networks.

Why do switches have IP addresses?

If you want to be able to manage your switch remotely over the network, your switch needs an IP address. If your switch has multiple VLANs configured, and you want to be able to manage the switch from each VLAN, the switch requires an IP address on a VLAN interface in each VLAN.

Is a switch faster than a router?

The speed limit is 1-10 Mbps for wireless and 100 Mbps for wired connection. The speed limit for the switch is 10/100Mbps. In various types of network environments (MAN/ WAN), the router works faster compares to Switch. In a LAN environment, a switch is faster than Router.

Can I use switch as a router?

Note: switches have absolutely no routing functionality and cannot take the place of a router. Your router likely has a four-port switch built into it but that does not mean your new eight-port dedicated switch can replace your router—you still need the router to mediate between your modem and switch.

Can we assign IP address to layer 2 switch?

Contrary to Router/Firewall configuration, Layer 2 Switch has ports configured as Layer 2 which can’t be given an IP address, instead SVI (Switched Virtual Interface) needs to be assigned an IP address. Switch is assigned IP address to manage it via Telnet or SSH services.

Can you use a Layer 3 switch as a router?

A layer 3 switch is both a switch and a router: it can be regarded as a router with multiple Ethernet ports and with switching function. … Layer 3 switches are thus able to segregate ports into separate VLANs and perform the routing between them.

Is VLAN a Layer 2?

A virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2). LAN is the abbreviation for local area network and in this context virtual refers to a physical object recreated and altered by additional logic.

Do switches have IP addresses?

A unmanaged switch does not have an IP address. It is a ethernet switch and it switches ethernet packets and on the level of ethernet packets there are no IP addresses. … The switch is only the mean to connect three or more devices.

What are the steps to configure a switch?

Step 1: Cable a network. … Step 2: Clear the configuration on the switch. … Step 1: Enter privileged mode. … Step 2: Examine the current switch configuration. … Step 3: Display Cisco IOS information. … Step 4: Examine the Fast Ethernet interfaces. … Step 5: Examine VLAN information. … Step 6 Examine flash memory.More items…