Cyclades AlterPath ACS, Command Reference Manual

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AlterPath ACS Command Reference Guide
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Network
4.3 DHCP Client
DHCP is a protocol that allows network administrators to assign IP addresses
automatically to network devices. Without DHCP (or a similar protocol like BOOTP),
each device would have to be manually configured. DHCP automatically sends a new IP
address to a connected device when it is moved to another location on the network.
DHCP uses the concept of a fixed time period during which the assigned IP address is
valid for the device it was assigned for. This “lease” time can vary for each device. A
short lease time can be used when there are more devices than available IP numbers. For
more information, see RFC 2131.
VI mode
The DHCP client on the Ethernet Interface can be configured in two different ways,
depending on the action the ACS should take in case the DHCP Server does not answer
the IP address request:
1. No action is taken and no IP address is assigned to the Ethernet Interface (most
common configuration):
Step 1 - In the /etc/portslave/pslave.conf file set the global parameter
conf.dhcp_client to 1.
Step 2 - Still in the portslave.conf file comment all other parameters related to
the Ethernet Interface ( conf.eth_ip , etc.).
Step 3 - Add the necessary options to the file /etc/network/dhcpcd_cmd (some
options are described later in this session).
2. The ACS restores the last IP address previously provided in another boot and
assigns this IP address to the Ethernet Interface. For the very first time the unit is
powered ON, the IP address restored is 192.168.160.10 in case of failure in the
DHCP. The unit goes out from the factory with DHCP enabled (
conf.dhcp_client 2):
Step 1 - Set the global parameter conf.dhcp_client to 2.
Step 2 - Comment all other parameters related to the Ethernet Interface
(
conf.eth_ip , etc.).