Do I need a router
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 Hi, 
 I am investigating the following oppertunity:we have a WAN with for example a C-class of public IP's. <wan>- Main Switch –- Switch A 
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 Switch Ba) The IP's are spread over Switch A & B (C....) All connected to the main switch. b) The clients connected to Switch A & B (C....) get the external address (no NAT) c) The Switches are Layer3 Question: Will The clients in Switch A be able to connect to the clients on Switch B without going through the WAN ?</wan> 
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 answering would be simplier if you have had router. with router wan-link would be unused in this scenario L2/L3 switch should have same functionality, it looks arp table where is this ip-address and send the packet straight there. Answer in short: you should be ok without router 
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 Ok thanks