Nera SatLink 1000, Руководство пользователя

Страница: 38 / 120

Nera SatLink Terminal User Guide – Revision P
36
7. LAN DHCP Server
To handle automated address assignment, the IETF has designed a protocol (RFC 2131) known as
Dynamic Host Configuration Protocol (DHCP). DHCP allows a computer to acquire automatically all IP
configuration information it needs when entering the network.
Whenever a new computer connects to the Nera SatLink Terminal’s LAN and the DHCP server in the
Terminal is enabled, the computer will be allocated an IP address by the DHCP server from the pool of
addresses defined by the Nera SatLink Terminal LAN subnet (defined by the LAN netmask).
IP addresses that will not be allocated automatically to new computers are the Nera SatLink Terminal’s
own IP address and eventually IP addresses specifically excluded during configuration.
7.1 Configuration of the DHCP server
The terminal administrator has the possibility to configure the following parameters:
•
Server Status : Enable or disable the Nera SatLink Terminal LAN DHCP server.
•
Lease time : Set the lease time for an IP address allocated to a host on the LAN
•
No. of IP addresses excluded : Specifies the number of IP addresses to be excluded from the
available range of addresses defined by the Nera SatLink Terminal LAN subnet. The excluded
range of IP addresses will be the upper range of the LAN subnet. I.e. if the Nera SatLink
Terminal LAN is allocated the IP addresses 10.10.10.1 to 10.10.10.254, and 2 IP addresses are
excluded for use by the DHCP server, then the DHCP server will have the IP address range
10.10.10.1 to 10.10.10.252 available for DHCP clients.
•
Primary DNS server : IP address for the primary DNS server to be used by the hosts on the Nera
SatLink Terminal LAN.
•
Secondary DNS server : IP address for the secondary DNS server to be used by the hosts on the
Nera SatLink Terminal LAN.
To enable the DHCP server, use the CLI command
ip dhcp enable.
The lease time of IP addresses can configured using the CLI command
ip dhcp leasetime.
Example
# ip dhcp leasetime 1 D
The command in this example will configure the lease time to 24 hours (one day).
To view the DHCP server configuration and, if enabled, the DHCP client table, use the CLI command
ip
dhcp show.