customer complains that the cellular interface is flapping between UP and down
1. Asking for diagnostic
2. Asked for log.log and
* We’ve checked
the configuration, and the customer configured these commands below that
triggers the modem recovery when the NQA fails. Also, the device will search
the PLMN again when the number of consecutive 3G or LTE link detection failures
reaches the maximum value.
modem auto-recovery track nqa
test 1 probe-cycle 1
modem auto-recovery track
action plmn-search fail-times 1
Considering all these aspects,
we’ve checked the NQA configuration and it is not correct, so the NQA will not
succeed, that will cause modem recovery.
The frequency value in the NQA
configuration for ICMP test must be larger than the product of interval and
probe-count. In your case, since the probe count is 15 and the default value of
the interval is 4 seconds, the frequency should be bigger, not 1.
Our recommendation is to use a smaller value for the probe count (like 3 or 4) and to set a bigger value for the frequency (frequency > interval X probe count).