Netscout OneTouch AT 10G, User Manual

Page: 79 / 248

Chapter 4: Network Infrastructure Tests
DHCP Server Test
77
DHCP Server Test
Description
The DHCP (Dynamic Host Configuration Protocol) server test
provides a breakdown of the process of acquiring a DHCP IP
address on both the wired connections. The identity of the DHCP
server, offer and acceptance timing, and lease information are
provided. The analyzer also detects and reports the presence of
more than one DCHP server on the network.
Configuration
If the analyzer is configured with a static IP address, the DHCP
Server Test will not run. The test’s icon will appear faded, and the
word “Static” will be displayed under the icon.
If the analyzer is configured for DHCP, this test will run. To enable
or disable DHCP, see page 173.
The Time Limit determines how much time can elapse before the
analyzer receives a response from the server. If the Time Limit is
exceeded, the test will fail.
1 On the HOME screen, tap the DHCP server icon .
2 Tap the SETUP tab.
3 Tap the Time Limit button and choose a limit.
How it Works
The analyzer broadcasts a message to discover DHCP servers in the
broadcast domain. Typically, there should be only one DHCP
server in the broadcast domain. It responds with an IP address and
lease, and provides other information such as the subnet mask,
and the IP address of the default gateway and DNS server.