DHCP and UDP configuration using Enterprise Device Manager

Dynamic Host Configuration Protocol (DHCP), an extension of the Bootstrap Protocol (BootP), dynamically provides host configuration information to workstations. To lower administrative overhead, network managers prefer to configure a small number of DHCP servers in a central location. Using few DHCP servers requires the routers connecting to the subnets or bridge (or VLAN) domains to support the BootP/DHCP relay function so that hosts can retrieve the configuration information from servers several router hops away.

User datagram protocol (UDP) is a connectionless protocol that adds reliability and multiplexing to IP. It describes how messages reach application programs within a destination computer. Some network applications, such as the NetBIOS name service, rely on a UDP broadcast to request a service or to locate a service. By default, broadcasts are not forwarded by a router. UDP broadcast forwarding is a generalized mechanism for the router to selectively forward UDP broadcasts.

Important

Important

BootP/DHCP relays are supported only on IP routed port-based VLANs and protocol-based VLANs.

Before you begin

You must enable DHCP relay on the path for port or VLAN configuration to take effect.