BelAir20E User Guide
BelAir20E Auto-configuration
April 2, 2012
Confidential
Document Number BDTM02201-A01 Standard
Data provided by the DHCP server overrides any data configured locally.
During operation, if the DHCP server provides updated data, the BelAir20E
continues operation with the updated data.
Pre-requisites
To use DHCP options, your DCHP server must be configured to supply the
information requested by the BelAir platform. In particular, make sure of the
following:
• Your DHCP server supplies a list of SNTP servers instead of NTP servers
and that they are listed in order of preference.
• Your DHCP server assigns only one default route, even you are using many
different IP interfaces on the same BelAir platform (for example, a
management IP interface and a VLAN IP interface).
Configuring and Using
DHCP Options
To use DHCP options, you must:
1 Set the default IP address assignment of an interface to
dynamic
and set the
accept-dhcp-params
parameter to
enabled
.
2 Specify which specific parameters to accept from DHCP server. See
“Accepting Specific DHCP Parameters” on page 60
The BelAir20E then contacts the DHCP server to request the parameters.
Accepting Specific
DHCP Parameters
/protocol/ip/set dhcp-accept ([dns-domain {enabled|disabled}]
[dns-server {enabled|disabled}]
[tftp-download {enabled|disabled}]
[time-server {enabled|disabled}]
[time-offset {enabled|disabled}])
These commands control whether the individual parameters supplied by the
DHCP server are accepted or not by the BelAir20E. To use this command you
must first set the default IP address assignment for the interface to
dynamic
and
set the
accept-dhcp-params
parameter to
enabled
. See
By default, the node accepts all parameters from the DHCP server; that is, each
of these parameters is set to
enabled
.
The
dns-domain
parameter controls the domain name option used to perform
DNS requests. Only one domain name is valid at any one time per BelAir20E.
See
“Configuring the Domain Name System Lookup Service” on page 48
.