Digi TransPort WR31 User Manual page 155

Configure network interfaces
Generate Ping packets on this interface
Enabling this option displays the parameters for enabling auto-pings to be transmitted from this
interface. The interface can monitor these pings. If auto-pings were enabled on and in the event
of no ping reply, the router takes the interface out of service for a specified amount of time,
before allowing use of the interface again. Another option is to enable auto-pings on this
interface and let the firewall handle taking the interface out of service in the event of a failure.
Both methods are explained in Application Notes on your TransPort product's Product Support
page.
Send n byte pings to IP host a.b.c.d every h hrs m mins s seconds
For this setting, n specifies the payload size of a ping packet when using the auto ping feature.
Leaving this parameter blank uses the default value. The address a.b.c.d specifies the
destination IP address for auto-ping ICMP echo request. The values h, m and s specifies how
often the router transmits Auto-ping packets to the specified destination in (h) Hours, (m)
Minutes and (s) Seconds.
Switch to sending pings to IP host a.b.c.d after n failures
For this setting, a.b.c.d specifies an alternative destination IP address for the auto-ping ICMP
echo request to be sent to, should the main IP address specified in the parameter above fail to
respond. This allows the router to double check there is a problem with the connection and not
just with the remote device not responding. The value n specifies the number of pings that must
fail before the checking the second IP address. The extra IP address check is only enabled if this
parameter is set to something other than 0.
Only send Pings when this Ethernet interface is "In Service"
If this parameter is enabled, this interface sends ICMP echo requests when it is in service only.
The default setting is disabled; ICMP echo requests are sent when the interface is in service and
out of service.
Take this interface "Out of Service" after receiving no responses for s seconds
The length of time, in seconds, before a route will be designated as being out of service if there
has been no response to ANY of the ICMP echo requests during that time period.
Keep this interface out of service for s seconds
The length of time, in seconds, for which any routes using this Ethernet interface are held out of
service after a ping failure is detected.
Digi TransPort WR Routers User Guide
Configure Ethernet interfaces
155