Configuring The Dhcp Client - Nokia ESB26 User Manual

19.
When to Use DHCP?
A client should use DHCP to reacquire or verify its IP address and network parameters
whenever the local network parameters may have changed (e.g. at the switch boot time or
after a disconnection from the local network), as the local network configuration may change
without the client's or user's knowledge.
If a client has knowledge of a previous network address and is unable to contact a local
DHCP server, the client may continue to use the previous network address until the lease for
that address expires. If the lease expires before the client can contact a DHCP server, the
client must immediately discontinue use of the previous network address and may inform
local users of the problem.
Benefits
By using the DHCP, the time required by a client to configure and deploy the IP address is
reduced. The configuration error can also be reduced and the costumers can control the
assigned IP address.

Configuring the DHCP Client

Table 19-1 lists the DHCP client commands.
Table 19-1 DHCP Client Commands
C o m m a n d
ip address dhcp
dhcp-client discover-rto
show dhcp-client
show positioning
dhcp-client save-config
Enabling the DHCP Client
The ip address dhcp command, in Global Configuration mode, provides the switch with its
IP configuration information dynamically. The DHCP client starts and begins DHCP
negotiation. If the IP address is specified, the DHCP client sends a request for this address,
and if the requested IP address is not available, the server returns another IP address. The no
MN700004 Rev 01
DHCP Client
D e s c r i p t i o n
Provides the switch its IP configuration information dynamically.
Sets the DHCPDISCOVER message retransmission timeout.
Displays the DHCP client configuration.
Displays the slot and location of the Nokia ESB26 switch.
Saves the configuration file that is loaded from a TFTP server.
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