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Managed Switch Recommendations (with security)

hi, i am looking for recommendations for managed switches with security options and flow exports (sFlow or NetFlow). i really need a smart switch that can help me block rogue dhcp servers on our network by figuring out which port it's communicating on and/or blocking the MAC address. these rogue servers are usually NOT on the same subnet of our network.

i've looked for hours but there's a lot of different terms that the companies use and vastly different prices for switches that seem to do the same thing. I need a 48 port (or two 24 port) managed switch recommendations that are reliable and offer security options. This is for a small business so price should (hopefully :-) be low.

thanks!

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Kamran Arshad

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goldylamont

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thanks for the advice. I also like the looks of this Dell switch, however I'm unsure if it will do sFlow/Netflow or equivalent. it does do vlan trunking and says it does dhcp snooping also; so sounds promising but i need to look into it further. The price is right for 48 ports ($600) and i've used dell switches before and like em...but not sure if it has all the options i need (i need it to work with ntop, packetFence and export sFlow/Netflow).

Dell 3548 48 port switch:
http://www.dell.com/us/en/business/enterprise/pwcnt_3548/pd.aspx?refid=pwcnt_3548&s=bsd&cs=04

thanks uetian. any other suggestions from EE?