DHCP or Static IP Test
The DHCP (Dynamic Host Configuration Protocol) test indicates whether the LR 10G receives an IP address assignment from the DHCP server.
In this Topic
DHCP Settings – IP Configuration
DHCP Settings – IP Configuration
To open the IP Configuration screen, either:
-
Open a
on the DHCP test results screen. -
Tap the main menu icon
, select AutoTest Settings, open a
DHCP
DHCP is enabled by default. Tap the toggle button to disable DHCP and enter static IP addresses, as described below.
Response Time Threshold
(Appears only if DHCP is enabled.) Tap this field to select a value or enter a custom value to set how long the LR 10G waits for a DHCP server response before failing the DHCP test.
Warn When Multiple Offers
(Appears only if DHCP is enabled.) Depending on how your network is configured, multiple DHCP offers may or may not be a problem. Tap this field to toggle whether AutoTest creates a warning if multiple offers are received.
DHCP Request Options
(Appears only if DHCP is enabled.) Tap this field to open a dialog to select one or more DHCP request options.
Custom Vendor Class Identifier
(Appears only if DHCP is enabled.) Custom Vendor Class Identifier is disabled by default. Tap the toggle button to enable the Vendor Class Identifier field, as described below.
Vendor Class Identifier
(Appears only if Custom Vendor Class Identifier is enabled.) Tap this field to type the vendor class identifier.
Static IP Address
The Static IP address fields for Subnet Mask, Default Gateway, and Primary and Secondary DNS Servers only appear if DHCP is disabled. Tap each field to open a pop-up number pad and enter the static addresses as needed. Tap OK to save your entries.
NOTE: If the Static IP Address setting is left blank, your tester will consider the network under test to be an IPv6 only environment, and no IPv4 Address assignment will take place.
DHCP Test Results
When DHCP is enabled, the DHCP test card and results screen are displayed in the Profile.
The DHCP Test card displays the DHCP server's IP address and the total time for the discover, offer, request, and acknowledgment to complete.
Tap the card to open the DHCP test screen.
NOTE: (User-defined) appears next to the MAC address beneath the DHCP IP address on the results screen when a User-Defined MAC is enabled for this connection in General Settings or in the AutoTest profile.
DHCP Test Results Screen
Device Name: The discovered name of the DHCP Server, or, if no name could be discovered, the IP address
IPv4 Address: IP address of the server
MAC Address: Server's MAC address. Two dashes -- indicate that no MAC address was provided from the server.
Results
Offered: IP address offered by the DHCP server
Accepted: IP address accepted by the LR 10G
Subnet Mask: Used to determine which addresses are local and which must be reached via a gateway
Subnet: Combination of the subnet mask and the offered IP address
Lease Time: The amount of time the IP address is leased to the LR 10G by the DHCP server
Expires: Expiration date and time of the IP address
Relay Agent: If a BOOTP DHCP relay agent is present, this field shows its IP address. The relay agent relays DHCP messages between DHCP clients and DHCP servers on different IP networks.
End User Response Time table and chart: Breakdown of the times for the process of acquiring a DHCP IP address
Acknowledge: Time between LR 10G sending the request and receiving the acknowledgment from the DHCP server
Total Time: Total amount of time consumed by the DHCP process
Threshold: The DHCP Response Time Threshold from the DHCP test settings, which controls how long the LR 10G waits for a DHCP server response before failing the DHCP test.
End User Response Time: A pie chart showing the Offer and Acknowledgment times as percentages
DHCP Request Options: If you have selected any DHCP Request Options from the IP Configuration screen, this table lists those options. Each row shows the option name, number, and any value received. If the option was not received, double dashes are shown with a yellow Warning dot.
IPv6 Addresses: Addresses obtained via router advertisement
Results Codes: Final status of the test (Success or Failure)
The additional actions available on the DHCP test screen include opening the Path Analysis, Ping/TCP, or Capture apps populated with the DHCP server address, browsing to the IPv4 address in the web browser, starting a Telnet or SSH session, or viewing the Connect Log.
Static IP Test Results
If DHCP is disabled, the DHCP test becomes a "Static IP" test and the Subnet and addresses that were entered in the DHCP test settings are displayed.
The Static IP card displays the configured IP and Subnet addresses.
Tap the card to open the test results screen.
The Static IP test screen displays the configured addresses.
Subnet: Combination of the subnet mask and the offered IP address
Subnet Mask: Used to determine which addresses are local and which must be reached via a gateway
Gateway: Resolved hostname of the Gateway or its IP address if no name could be discovered
IP Address: IP address of the Gateway
DNS (1 and 2): Names and IP addresses of Primary and Secondary DNS servers
IPv6 Addresses: Addresses obtained via router advertisement
Results Codes: Final status of the test (Success or Failure)
Duplicate IP Address
The DHCP and Static IP tests also detect and report the presence of a device using the same IP address (duplicate IP). If the configured address is in use, the AutoTest fails.
IP Address In Use By: Shows the name of the device currently using the configured static IP address. Tap the blue underlined link to open a Discovery Details screen for the device.