MS20xxA VNA Master UG 10580-00166 Rev. C G-1
Appendix G — More About
DHCP
G-1 Introduction
DHCP stands for Dynamic Host Configuration Protocol. This protocol allows a server to
dynamically assign IP addresses to devices that are connected to the network. Most networks
include a DHCP server to manage IP addresses. When a DHCP server is available on the
network, DHCP is the preferred IP address mode.
G-2 Using DHCP
When using DHCP, no setup is required to lease and use a dynamic IP address. In a dynamic
IP operation, the assigned IP address may change from use to use. The DHCP server assigns
IP addresses on a time rotation basis. As soon as the device is disconnected from the network,
the IP address that it was using becomes available to lease to the next unit requesting an IP
address. Normally, some amount of lag time occurs on the DHCP server end, so if the device
is connected again reasonably soon, it may receive the same address.
G-3 Static IP Address
When a DHCP server is not available, a Static IP address can be used. A Static IP address is
a fixed address. After being set, it will always remain the same, and care must be taken to
avoid conflict with other equipment on the network.
When using a static IP address on an established network, always request a Static IP address
from the network administrator. Randomly choosing a Static IP address on an established
network may result in duplicate IP addresses or other conflicts.
Three parameters must be set prior to using a Static IP address:
IP Address
This is the Static IP address on the network.
Default Gateway
Often when a static IP address is assigned, a default gateway is also identified. If the default
gateway is unknown, then type in the Static IP address so that the Static IP address and
Default Gateway are the same number.
Note
The VNA Master must be connected to the network before it is turned on in order
to allow DHCP to work. Key elements of the DHCP lease are performed only
during the instrument startup operations or when switching from manual to DHCP.
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