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Your computer is probably connected to an Ethernet switch, which is only going to transmit broadcast traffic or traffic bound to your computer's MAC address. This is the difference between a switch, which gives each computer a dedicated Ethernet collision domain, and an Ethernet hub, which shares a collision domain across all connected devices. In a ...


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IP is a Layer-3 addressing scheme, so your subnet layout will only matter for routers. Switches work on Layer-2 and do not deal with IP addresses at all. In Short, a workstation wanting to contact another IP will do a bitwise comarison of netmask and local subnet address. When this results in a local address (your target), an ARP broadcast for that address ...


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The Ethernet address on the frame is the MAC address of the router (layer 2). The payload of the ethernet frame, like an IP packet (layer 3) still contains the original destination IP address. The router will create a new frame frame with the MAC address of the destination computer containing the original payload.


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Well there are some things you can test. First and for all, in your topic you write about vlans. Is the server connected to a switch? If so, are the ports correctly configured in the right VLAN (access port?) etc... Is your server a virtual machine? Is the VLAN properly configured on the virtual NIC (portgroup on ESX f.e.)? 2nd: Is your server able to ...


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STILL WONDERING Why doesn't the provided AWS DNS Server work in this case? PROBLEM The problem was that DNS names weren't resolving via the local DNS server than Amazon provided when originally creating the VPC. I discovered that I could make outgoing HTTP/HTTPS connections to IP addresses, which didn't need to contact a DNS server to resolve. SOLUTION ...


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The problem is that you have two separate IP networks in the same broadcast domain, and therefore you don't get the behavior you want. You need to set up separate VLANs for the different devices you have, so that there is only one DHCP server per network/broadcast domain.



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