Table of Contents
Advertisement
6.5 DHCP
The DHCP server of the GlobeSurfer 3G makes it possible to easily add com-
puters that are configured as DHCP clients to the local network. It provides
a mechanism for allocating IP addresses to these hosts and for delivering net-
work configuration parameters to them.
A client (host) sends out a broadcast message on the LAN requesting an IP ad-
dress for itself. The DHCP server then checks its list of available addresses and
leases a local IP address to the host for a specific period of time and simulta-
neously designates this IP address as taken. At this point the host is configured
with an IP address for the duration of the lease.
The host can choose to renew an expiring lease or let it expire. If it chooses to
renew a lease then it will also receive current information about network ser-
vices, as it did with the original lease, allowing it to update its network config-
urations to reflect any changes that may have occurred since it first connected
to the network. If the host wishes to terminate a lease before its expiration it
can send a release message to the DHCP server, which will then make the IP
address available for use by others.
The DHCP server:
• Displays a list of all DHCP hosts devices connected to GlobeSurfer 3G
• Defines the range of IP addresses that can be allocated in the LAN
• Defines the length of time for which dynamic IP addresses are allocated
• Provides the above configurations for each LAN device and can be con-
figured and enabled/disabled separately for each LAN device
• Can assign a static lease to a LAN PC so that it receives the same IP ad-
dress each time it connects to the network, even if this IP address is within
the range of addresses that the DHCP server may assign to other comput-
ers
• Provides the DNS server with the host name and IP address of each PC
that is connected to the LAN
6.5.1 DHCP Server Summary
To view a summary of the services currently being provided by the DHCP
server:
1. Click DHCP on the Advanced screen of the management console. The
DHCP summary screen will appear (see figure 6.8).
2. Click the Name of a device to display the DHCP settings for that device.
146
Advertisement
Table of Contents
