NetComm NTC-220 User Manual page 57

The table below describes each field on the Failover configuration screen.
O P T I O N
Metric
Monitoring method
Verbose logging
First destination
address
Second destination
address
Periodic Ping timer
Retry timer
Consecutive error monitor
Failover fail count
Failback success
count
Periodic ratio monitor
Monitor total count
Failover fail count
Failback success
count
NTC-220 – User Guide
UG01028 v1.2 March 2019
The metric is a numeric value which determines which interface has
priority. Lower priority values mean higher priority.
Specifies the means used to determine whether the link is up or
down.
When enabled, this logs verbose comments in the system log
related to the failover monitoring.
The first address the router that the router should ping in order to
confirm the connection is up. This may be an IP address or a domain
name.
The second address the router that the router should ping in order
to confirm the connection is up. This may be an IP address or a
domain name.
The time in seconds between ping attempts.
The time in seconds between attempts when a ping failure occurs.
The number of failed pings that must occur before the monitor fails
the connection over to the next interface.
The number of successful pings that must occur before the monitor
fails the connection back to the higher priority interface.
This field specifies a series of pings to consider when calculating
whether to fail over or fail back. When the series is completed, the
router repeats the ping test and resets the Failover fail
count/Failback success count, therefore, in order for the failover or
failback ratio to be met, the number of Failover fail counts/Failback
success counts must occur within a particular series.
This field specifies the number of failed ping results that must occur
within a series of pings configured in the Monitor total count before
the router fails over to the next highest priority interface. For
example, at the default setting of 5, the router fails over to the next
interface when 5 out of 10 ping attempts in a particular series have
failed. The failures need not be consecutive to meet the failover
criteria. If any 5 of the 10 pings in a series have failed, the router
deems the interface connection to be down and fails over.
Like the Failover fail count field, this field specifies the number of
ping successes that must be registered on a higher priority interface
within a series of pings configured in the Monitor total count before
the router fails back to that interface.
Table 17 – Failover configuration – Ping monitoring
D E S C R I P T I O N
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