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Difference Between L3 & L2 Switches

By sree_cb ·
Hi Techies.

Please give me the differneces of Layer-3 & Layer-2 Switches. Pls Help..


thanks & reg'ds

Sree

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by sbrown95 In reply to Difference Between L3 & L ...

a layer 2 device is a switch(communicates at frame level), a layer 3 is a router(communicates at packet level).

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by sbrown95 In reply to Difference Between L3 & L ...

a layer 2 device is a switch(communicates at frame level), a layer 3 is a router(communicates at packet level).

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by hozcanhan In reply to Difference Between L3 & L ...

Hi, I think you are at the verge of buying new switches and you want to decide if you want to pay the price and buy a layer 3 switch . First two layers in OSI Model ( Layer 1 & 2 ) are the Physical layer and the Data Link layer . As their name implies they work with NICs, cables , connectors and mac addresses and DO NOT KNOW ( ARE NOT AWARE OF ) IP addresses . So layer two switches are just busy with transferring the stuff given to the from upper layers ( layer 3 - Network Layer ) to the mac addresses . Layer 3 switches are at the Network Layer and are aware of the IP addresses . So applications that work with or can manipulate IP addresses can be "added" to the capabilities of the switch to be implemented on the switch . These applications are protocol based capablities in line with specific standart that YOU SEE as a list of features of a layer 3 switch . Whether to buy an intelligent switch depends on your enterprise size and cost/performance considerations of your bosses.

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by jmgarvin In reply to Difference Between L3 & L ...

Layer 2 - MAC and LLC ONLY! So this means that you are getting a "real" switch.

Layer 3 - A "smart" switch. You can see the network layer so you can see IPs and some datagram packets.

Which do you need? I don't know, but I tend to suggest springing for the Layer 3 switch if you are unsure...

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by jolson In reply to Difference Between L3 & L ...

What also appears to be overlooked is that a layer 3 switch performs the function of a router-on-a-stick in a VLAN environment. As such, the switch can route information between different VLANS. The bennefits is the reduction on hops required, speed and less equipment to purchase.

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by yasirirfan In reply to Difference Between L3 & L ...

Layer 2 Switches basically works at datalink layers and here are some of its features

a)Layer 2 Switches forwards the frames using MAC address.
b)MAC address table is maintained and updated preodically for associated switch ports.
c)Broadcast & multicast frames are flooded out to all the ports except the port from which it originated.
and is primarily used for workgroup connctivity and network segmentations.

Layer 3 Switches basically works with Network layer with layer 2 capabilities,
some of its features are
a) Packets are forwarded at layer 3 just as routers,
b) packets r switched using specialized hardware ASICs
c)packets can be forwarded with security control & QOS (quality of service) using Layer 3 address information.
Layer 3 Swicthes are designed to examine & forward the packets in high speed LAN environment.

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by yasirirfan In reply to Difference Between L3 & L ...

Layer 2 Switches basically works at datalink layers and here are some of its features

a)Layer 2 Switches forwards the frames using MAC address.
b)MAC address table is maintained and updated preodically for associated switch ports.
c)Broadcast & multicast frames are flooded out to all the ports except the port from which it originated.
and is primarily used for workgroup connctivity and network segmentations.

Layer 3 Switches basically works with Network layer with layer 2 capabilities,
some of its features are
a) Packets are forwarded at layer 3 just as routers,
b) packets r switched using specialized hardware ASICs
c)packets can be forwarded with security control & QOS (quality of service) using Layer 3 address information.
Layer 3 Swicthes are designed to examine & forward the packets in high speed LAN environment.

Collapse -

by yasirirfan In reply to Difference Between L3 & L ...

Layer 2 Switches basically works at datalink layers and here are some of its features

a)Layer 2 Switches forwards the frames using MAC address.
b)MAC address table is maintained and updated preodically for associated switch ports.
c)Broadcast & multicast frames are flooded out to all the ports except the port from which it originated.
and is primarily used for workgroup connctivity and network segmentations.

Layer 3 Switches basically works with Network layer with layer 2 capabilities,
some of its features are
a) Packets are forwarded at layer 3 just as routers,
b) packets r switched using specialized hardware ASICs
c)packets can be forwarded with security control & QOS (quality of service) using Layer 3 address information.
Layer 3 Swicthes are designed to examine & forward the packets in high speed LAN environment.

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by bala_maxi99 In reply to Difference Between L3 & L ...

Difference between L2&L3 Switches

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Difference between L2&L3 Switches

by chamara In reply to

I need to know that the defference between Layer 02 And Layer 03 Network Switches

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