NetComm NTC-220 User Manual page 53

c However, if after another period defined by the Retry timer setting the router again does not receive a
response to any of the pings, it registers another Fail count.
d The router repeats the retry process until one of the following conditions is met:
i it receives a ping response and returns to testing the interface according to the Periodic ping
timer;
ii the number configured in the Failover fail count field (under Consecutive error monitor) is
reached, in which case the interface is marked as unavailable and the router automatically
reroutes packets according to the configured priorities of the remaining interfaces;
iii the number of Failover fail count pings (under Periodic ratio monitor) is reached within a
particular series of the Monitor total count, in which case the interface is marked as unavailable
and the router automatically reroutes packets according to the configured priorities of the
remaining interfaces.
Consecutive error monitor failover example
Periodic ratio monitor failover example
Failing back to a higher priority interface
The process for returning an unavailable interface to an available state is similar to the above process. When an
interface is marked unavailable by the ping monitor, the router continues to retry pings to the two destination
addresses via that interface according to the Periodic ping timer setting until one of the following conditions is
met:
it receives a 100% successful response to the six pings for a number of consecutive periods that equal the
configured Failback success count setting
the number of Failback success count pings (under Periodic ratio monitor) is reached within a particular
series of the Monitor total count, in which case the router continues pinging at the Periodic ping timer
interval and marks the interface as available. The router automatically reroutes packets according to the
configured priorities of the available interfaces.
NTC-220 – User Guide
UG01028 v1.2 March 2019
53 of 193
© NetComm Wireless 2019