User manual

Chapter 4 - Layer 3 Command Set - IP Networking DHCP Client. dhcpc Command
Alvarion BreezeNET B130/B300 GigE 232 Operational User Manual
4.18 DHCP Client. dhcpc Command
4.18.1 General Description
DHCP client is used for automatic retrieving of different parameters from DHCP
server for one or several unit's network interfaces. Among the parameters are
IP-address, network mask, default gateway etc.
DHCP client management is implemented via dhcpc command.
Syntax:
dhcpc [options] [IFNAME] [commands]
IFNAME - name of the network interface to which options and commands are
referred.
4.18.2 Options
Options define working parameters of DHCP client on a corresponding interface,
or these options defaults if no interface name is specified. For each option special
values can be specified: none and default. Option value none means this
parameter absence for this interface even though default value of this parameter
exists. Option value default means the absence of a specific parameter value
(meaning that only default option exists). With this, default parameter value is
applied if specified. Default option value is not displayed in DHCP client
configuration.
 -l (none|default|$ACLNAME|acl:ACLNAME) - sets the list of IP-addresses of
DHCP servers from which the client is permitted to receive parameters. Here,
ACLNAME - the name of access control list (see acl command). If specified list
is not configured in the system (this acl does not exist), DHCP client will be
able to receive parameters from any DHCP server.
 -k (none|default|key:KEYVALUE) - sets authorization key. DHCP authorization
is in accordance with "RFC 3118 - Authentication for DHCP Messages".
 -a (none|default|NUMBER) - sets the number of repeated arp requests which
sends DHCP client after getting a lease of IP-address from DHCP server. In
accordance with DHCP, the client is obliged to check received IP-address if
there are any other network devices with the same IP-address. For higher
reliability, DHCP client sends a series of such request with ¼ second interval.
If arp requests number is not specified for all of the interfaces (including
absence of default value for this parameter), DHCP client sends 16 requests.