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05.14.2008 at 05:13PM PDT, ID: 23403619
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My company will upgrade our cisco switches 3550, do i need buy a layer 2 switch or layer 3 one, what is the difference?

Tags: Cisco, switch, 3750, 3550, layer two or layer three switch?
I want to replace the switch in my company. My old one is 1 3550 plus 3 intel switch. I called Cisco and they give me a choice to choose layer2 or layer 3. My question is what is the difference between these two switches and do i need select a layer 3 switch.
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Question Stats
Zone: Networking
Question Asked By: condescendent
Solution Provided By: debuggerau
Participating Experts: 3
Solution Grade: A
Views: 0
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05.14.2008 at 05:18PM PDT, ID: 21569744

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05.14.2008 at 06:46PM PDT, ID: 21570079

Rank: Wizard

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05.18.2008 at 02:27AM PDT, ID: 21592064

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05.14.2008 at 05:18PM PDT, ID: 21569744
layer 3 is the network layer with gives you routing ability.

So you can configure routes between VLAN's within the switch itself.
Give you more control, but with added overhead.
http://www.pcmag.com/encyclopedia_term/0,2542,t=layer+3+switch&i=45957,00.asp
http://compnetworking.about.com/od/hardwarenetworkgear/f/layer3switches.htm
Accepted Solution
 
05.14.2008 at 06:46PM PDT, ID: 21570079

Rank: Wizard

You presently have a 3550 which is layer 3 capable. If you're using that feature (do you have more than 1 VLAN interface) then you should probably stick with a multilayer switch.

3550's aren't that bad of a switch. Why are you replacing it?
 
05.18.2008 at 02:27AM PDT, ID: 21592064
Layer 2 switches can operate at the MAC address layer (on Ethernet networks).  So you can do things like VLAN, (R)STP and LACP.
Layer 3 switches can operate at the MAC and IP layers (on Ethernet and TCP/IP networks).  So you can do things like VLAN, (R)STP, LACP, routing and IP packet filtering.

Generally, layer 2 is at the edge, layer 3 in the intermatatory or the core parts of the network.
Assisted Solution
 
 
20080236-EE-VQP-29 / EE_QW_2_20070628