The default scope will be whatever network your server is on, which I think you said it was the 10.1.1.0/24 network. You have defined the scope for that network, so it can only request from that scope.
So off it goes with the request to the DHCP server and since your subnet mask is 255.255.255.0 (or /24) then the network part is 10.1.6. So you plug a cable into this port that's connected to your laptop which has dhcp enabled on its nic card. And you have defined vlan 6 interface on the 10.1.6.0/24 network. So for example in your scenario:Įth port 0/1 is on vlan 6. Ok, it's nothing got to do with Vlan tags, it's to do with the net id of the requesting network/subnet. I understand now that you just want to know how it works. Find some good reads on google with the phrase DHCP relay helper or DHCP relay agent.Īhh thats good it's working ok. I read it a few different sides, I'm playing with Summit Extreme, CISCO, Adtran, and Sonicwall.
IP BROADCASTER WINDOW MAC
Since the relay slapped its IP on it to be responded to, the DHCP server sends the DHCP-ACK directly back to the relay and the relay passes it to the client's MAC address. The DHCP server sees that the relay slapped its IP address on it and digs around in that IP scope for something matching the MAC and hands off the next available address if it doesn't have a reserved IP already. When the switch gets a broadcast on a VLAN, the DHCP relay helper on that VLAN picks it up slaps its ip address on it and relays it as a unicast to your DHCP server as it is set along with the MAC address of the client. The switch has a DHCP relay helper enabled and set to point to your DHCP server. The switch or your router has an IP on each subnet/VLAN. You have VLANs A B C D, each with subnets A B C D. The DHCP relay IP is what determines what pool gets handed out.
IP BROADCASTER WINDOW WINDOWS
It's actually pretty simple, the windows DHCP server has no idea about the VLANs. Is it by the vlan tag? meaning if i tag vlan 6 on the port it will pick up the 10.1.6.x IP? but in windows how does it know the scope is 10.1.6.x? is it by the option 156? When it get to the DHCP server how does windows DHCP sever know which IP to give out? Is it controlled by the switch? Here is a picture of the windows dhcp. we are putting in vlan 6 which is shoretel.As you can see all three of this are going to the windows dhcp server 10.1.1.5. The new computer, therefore, sends out several broadcast packets.As you can see we have vlan 1 which is default = data. The computers already on the network have no way of telling there is a new computer connected to the network. The new computer has no idea of what other computers that are already there. When a new computer connects to the network it has to let the other computers know its there. Broadcast packets is a way to get attention These broadcast packets will switch forward to all computers behind them. A connecting computer sends those packets to inform all the other computers on the network that it is about to become part of the network. Instead, the broadcast packets are meant for all computers on the network. Broadcast packets have no specific destination address. In other words, when a computer tries to connect to a network it sends out broadcast packets. Broadcast packets can also be forwarded to other subnets if routers are configured to forward IP broadcasts, though this is not usually the case. Broadcast PacketĪ broadcast packet is sent over the network of computers and picked up by all hosts on the local subnet.
IP BROADCASTER WINDOW SERIES
In binary notation, this represents a series of 32 binary «ones». Definition of Broadcast Packet from Network Encyclopedia.īroadcast Packet is an Internet Protocol (IP) packet with the IP address 255.255.255.255.
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