Why Would a Layer 2 Switch Need an Ip

Here are the steps to configure an IP. Each layer provides TCPIP with the basic information it needs to move our data across the network.

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Conversely when the Layer 3 switch needs a Layer 3 interface connected to a subnet and many physical interfaces on the switch connect to that subnet an SVI needs to be used.

. However when a switch is accessed remotely through the network it must have a Layer 3 address. We need to provide this basic information needed by TCPIP in a standard format the network can understand. The IP address is configured under a logical interface known as the management domain or VLAN.

These layers group functions. SVIs forward traffic internally into the VLAN so that then the Layer 2 logic can forward the frame out any of the ports in the VLAN. With advanced security and network management tools this Layer 2 access switch is easy to deploy and manage.

This can be annoying and this is why this feature is often turned off especially in the lab environments. A router checks the source and destination IP addresses of each packet looks up the destination of the packet in the routers IP routing table and routes the packet to another router or a switch. However to perform switch management over the network or use protocols such as SNMP the switch will need to have an IP address.

When there is more than one way to go to the destination IP address routers can smartly. If you dont need to have a DNS server configured for your router you can use the no ip domain-lookup command to disable the DNS. A switch as a Layer 2 device does not need an IP address to transmit frames to attached devices.

TCPIP Five Layer Software Model Overview. Routers not switches function as default gateways. This format is provided by its five-layer software model.

Right-size your switch Deploy the number of ports and PoE power thats best for you and your budget with plug and play 24- and 48-port Ethernet models with fast 10GbE uplinks and optional PoE. A layer 3 switch is a switch in the sense that it allows you to connect devices that sit on the same subnet or virtual. It maintains a MAC address table which allows it to remember which ports have which MAC addresses associated with them.

The layer 2 switch can only do switching meaning it uses MAC address to switch forward packets from a port to only the destination port. The IP address must be applied to a virtual interface rather than to a physical interface. Usually the default VLAN 1 acts like the switchs own NIC for connecting into a LAN to send IP packets.

The process keeps happening until the destination IP address is reached and responds back.

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