Digi 90000566_H manual Lcp echo requests, Session successes, Session failures, Session bypasses

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lcp echo requests

The number of Link Control Protocol (LCP) echo requests that have been sent after a “quiet” interval, in order to test the PPP link and/or keep it alive. For Digi Cellular products, LCP echo requests are typically not used.

SureLink Statistics

Digi SureLink™ provides an “always-on” mobile network connection to ensure that a Digi Cellular Family device is in a state where it can connect to the network.

The statistics displayed for Digi SureLink pertain to the periodic tests, known as Link Integrity Monitoring tests, that are run over the established

PPPconnection to ensure that end-to-end communication is possible. There are three Link Integrity Monitoring tests available: There are three tests available: Ping Test, TCP Connection Test, and DNS Lookup Test. For descriptions of these tests, see "set surelink" on page 202.

In these SureLink statistics, a “session” is a PPP session. The session statistics are reset to zero at the start of a new PPP connection. The “total” statistics are the accumulated totals for all sessions since the device booted. The “tests” are the SureLink Link Integrity Monitoring tests that have been configured to be run when the mobile network connection is established.

session successes

The number of times a configured test was attempted and succeeded in a PPP session.

session failures

The number of times a configured test was attempted but failed in a PPP session.

session consecutive failures

The number of consecutive failures for a test, with no success. When a test is successful, the consecutive failures counter is reset to zero. The consecutive failures counter indicates a device's “progress” toward the configured maximum number of consecutive failures, after which the PPP link is taken down (and restarted).

session bypasses

If a configuration parameter is bad, a test is bypassed rather than considered to have succeeded or failed. This means the test was not run. If the PPP connection goes down while a test is in progress, that test may be classified as bypassed, since it could not be run. (Note that the PPP link may come down for many reasons, independent of SureLink testing.)

total successes

The total number of times a configured test was attempted and succeeded since the Digi device was booted.

total failures

The total number of times a configured test was attempted but failed since the Digi device was booted.

Chapter 2 Command Descriptions 35