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Dell EMC Networking OS Configuration Guide for the S5048F–ON System 9.14.2.8

Configure the System to be a DHCP Client

A DHCP client is a network device that requests an IP address and configuration parameters from a DHCP server.

Implement the DHCP client functionality as follows:
  • The switch can obtain a dynamically assigned IP address from a DHCP server. A start-up configuration is not received. Use bare metal provisioning (BMP) to receive configuration parameters (Dell EMC Networking OS version and a configuration file). BMP is enabled as a factory-default setting on a switch.

    A switch cannot operate with BMP and as a DHCP client simultaneously. To disable BMP in EXEC mode, use the stop bmp command. After BMP stops, the switch acts as a DHCP client.

  • Acquire a dynamic IP address from a DHCP client is for a limited period or until the client releases the address.
  • A DHCP server manages and assigns IP addresses to clients from an address pool stored on the server. For more information, refer to Configuring the Server for Automatic Address Allocation.
  • Dynamically assigned IP addresses are supported on Ethernet, VLAN, and port-channel interfaces.
  • The public out-of-band management interface and default VLAN 1 are configured by default as a DHCP client to acquire a dynamic IP address from a DHCP server.
  • By default, the switch is configured to operate in BMP mode as a DHCP client that sends DHCP requests to a DHCP server to retrieve configuration information (IP address, boot-image filename, and configuration file). All ports and management interfaces are brought up in Layer 3 mode and pre-configured with no shutdown and no ip address. For this reason, you cannot enter configuration commands to set up the switch. To interrupt a BMP process, prevent a loop from occurring, and apply the Dell EMC Networking OS image and startup configuration stored in the local flash, enter the stop bmp command from the console. To reconfigure the switch so that it boots up in normal mode using the Dell EMC Networking OS image and startup configuration file in local flash, enter the reload-type normal-reload command and save it to the startup configuration:
    DellEMC# reload-type normal-reload
DellEMC# write memory
DellEMC# reload
  • To re-enable BMP mode for the next reload, enter the reload-type jump-start command.
  • If the management port is associated with any non-default VRF, then the ip address dhcp command does not work.

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