DHCP, DNS, NTP, and RPC_Ping Test Parameters

Traverse measures the time to complete each transaction, and raises an alert if the response time exceeds the warning or critical thresholds. It also generates an alert if the transaction is incomplete or cannot be completed or times out. Tests for the following types of servers:

DHCP - Check if DHCP service on a host is available, whether it has IP addresses available for lease and how long it takes to answer a lease request. On Microsoft DHCP servers, additional metrics such as statistics on discover, release, ack, nak requests.
DNS - Domain Name Service (RFC 1035) - uses the DNS service to look up the IP addresses of one or more hosts. It monitors the availability of the service by recording the response times and the results of each request.
NTP - Monitors time synchronization service across the network by querying the NTP service on any server and returning the stratum value. If the stratum is below the configured thresholds, an error is reported.
RPC_PING - Checks if the RPC portmapper is running. This is a better alternative to icmp ping for an availability test.

Note: The RPC_Ping test is not supported for Windows-based devices. Executing this test against Windows-based devices causes the result to display as "FAIL".

Credential/Configuration Settings

Not required.

Test Parameters

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Field	Description
Test Name	Enter/modify the name of the test.
Interval	Use the drop-down menu to specify the interval at which Traverse executes the test.
Thresholds (warn/critical)	Enter/modify the threshold levels that cause the test to change to (a state of) Warning or Critical, respectively.
Units	(NTP) Set to "Stratum" by default. Stratum levels define the distance from the reference clock. (RPC_Ping, DHCP) Set to "ms" (milliseconds) by default. (DNS) Set to "sec" (seconds) by default.
Action Profile	Use the drop-down menu to select an action profile for the test. See Administrator Configured Action Profiles and Thresholds for more information.
As test value rises, severity: (RPC_Ping, DHCP test only)	Auto: If you select this option, Traverse sets this option based on the Warning and Critical thresholds for this test. If the Critical threshold is higher, as test value rises, severity ascends. If the Warning threshold is higher, as test value rises, severity descends. Ascends: As the value of the test result rises, severity rises. Descends: As the value of the test result rises, severity falls. Discrete: Specify a list of integers or ranges of numbers using the syntax: 1,3,5,10-25. Specify different values for warning and critical. Any returned value that does not match a value in either list means the device is OK. Bidirectional: You can set a "range" of numbers for each threshold and if the value crosses either of these two boundaries of the range, it will set the severity to Warning or Critical.
Domain Name (DNS test only)	Enter/modify the name of the domain against which you want to execute the test.