Users Guide

2. Run the show ip interface brief command to verify if an IP address is assigned to ethernet 1/1/2 port.
OS10# show ip interface brief
Interface Name IP-Address OK Method Status
Protocol
====================================================================================
=====
Ethernet 1/1/1 unassigned YES unset up
up
Ethernet 1/1/2 40.1.1.1/24 YES manual up
up
…
3. Re-enable the DHCP server because it failed to start initially.
OS10# configure terminal
OS10(config)# ip dhcp server
OS10(config-dhcp)# disable
OS10(config-dhcp)# no disable
OS10(config-dhcp)#
Configuration notes
All Dell EMC PowerSwitches except MX-Series, S4200-Series, S5200 Series, and Z9332F-ON:
● Before you configure a DHCP address pool, you must configure a DHCP server interface with an IP address in the range that
is used in the DHCP address pool. If you configure the DHCP address pool first, and then configure a DHCP server interface,
to enable automatic DHCP address allocation, you must restart the DHCP service using the disable and no disable
commands. Select one of the choices for successfully configuring a DHCP address pool:
○ Configure manual binding for a host/hardware MAC address in the IP address range that is used for the DHCP pool.
○ Configure a network statement with a valid IP address range.
● DHCP client is enabled by default on the management interface. The management interface automatically tries to obtain an
IP address from a DHCP server. To manually configure an IP address on the management port, disable the DHCP client using
the no ip address dhcp command in Interface mode
● The DHCP server does not start unless at least one interface matches one of the configured network pools. An interface
matches a network pool when you include the IP address in the subnet that is defined for that network pool. For example, an
interface with IP address 10.1.1.1/24 matches a pool that is configured with network 10.1.1.0/24.
Packet format and options
The DHCP server listens on port 67 and transmits to port 68. The DHCP client listens on port 68 and transmits to port 67.
In the DHCP packet format, configuration parameters are options in the DHCP packet in type, length, value (TLV) format. To
limit the number of parameters that servers provide, hosts enter the parameters that they require and the server sends only
those parameters. DHCP uses the User Datagram Protocol (UDP) as its transport protocol.
The following options are commonly used in DHCP packets.
DHCP Option
Description
Subnet mask 1 — Subnet mask of the client
Router 3 — Router IP addresses that serve as the default gateway for the client
276 System management