Lenze E94AYCEN - Manual (Page 35)

EDS94AYCEN EN 9.0 - 09/2012
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35
E94AYCEN communication manual (Ethernet)
Commissioning
DHCP implementation in the Servo Drive 9400
6.3.2 DHCP network architecture
6.3.3 DHCP operating mode
DHCP is a client-server architecture. The DHCP server has access to a pool of IP addresses,
which it can freely assign to the DHCP clients. For larger networks, the DHCP server also
needs to know which subnetworks and gateways are available.
[6-4] DHCP operating mode
 In the first step, the client transmits a "DHCP discover broadcast", which searches for
the server.
 The server responds to the client with a "DHCP offer" (unicast). This message contains
the IP address, subnet mask, lease time and other information for the client.
 The client then accepts this data and reports this situation to the server by means of a
"DHCP request" message.
 The server completes the DHCP configuration with a "DHCP acknowledge" message.
This message contains the server IP address, client IP address, lease time, subnet mask
and other configuration information.
Data relating to the DHCP network architecture
DHCP model
Client/Server
Transport protocol UDP
Ports Server - UDP port 67
Client - UDP port 68
DHCP packet size 576 bytes
Compatibility DHCP is an advancement on BOOTP, so the DHCP server can also manage
BOOTP clients.
E94YCEN020
DHCP-
Client
DHCP-Acknowledge
DHCP-Request
DHCP-Offer
DHCP-Discover
DHCP-
Server