Dell Networking S6000 Uživatelský manuál stáhnout pdf (Strana 297)

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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

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 only on Ethernet interfaces: 10Gigabit, 40 Gigabit,

and 100/1000/10000 Ethernet Interfaces. The DHCP client is supported on 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 Jumpstart 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 Jumpstart process, prevent a loop from occurring, and

apply the FTOS image and startup configuration stored in the local flash, enter the stop jump-start

command from the console. To reconfigure the switch so that it boots up in normal mode using the

FTOS image and startup configuration file in local flash, enter the reload-type normal-reload

command and save it to the startup configuration:

FTOS# reload-type normal-reload

FTOS# write memory

FTOS# reload

• To re-enable Jumpstart mode for the next reload, enter the reload-type jump-start command.

Configuring the DHCP Client System

This section describes how to configure and view an interface as a DHCP client to receive an IP address.

Dell Networking OS Behavior: The ip address dhcp command enables DHCP server-assigned

dynamic addresses on an interface. The setting persists after a switch reboot. To stop DHCP transactions

and save the dynamically acquired IP address, use the

shutdown command on the interface. To display

the dynamic IP address and show DHCP as the mode of IP address assignment, use the show

interface

type slot/port command. To unconfigure the IP address, use the no shutdown

command when the lease timer for the dynamic IP address is expired. The interface acquires a new

dynamic IP address from the DHCP server.

To configure a secondary (backup) IP address on an interface, use the ip address command at the

INTERFACE configuration level.

Use the no ip address dhcp command to:

Dynamic Host Configuration Protocol (DHCP)

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