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DHCP

How a device asks the network for an IP address, a gateway and DNS servers when it joins.

The Dynamic Host Configuration Protocol leases a joining host its IP address, prefix, default gateway and DNS servers for a limited time.

Examples

  • On joining, the sensor broadcasts a DHCP discover and the router answers with 192.168.1.37, mask 255.255.255.0, gateway 192.168.1.1 and a DNS server.

  • DHCP messages go from client port 68 to server port 67, in a frame to ff:ff:ff:ff:ff:ff because the sensor has no address yet.

See also

DHCP lease DNS default gateway
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