User’s Manual
Arctic EDGE Router
25
Viola Systems Ltd.
Monitor
Monitor is used for GPRS and VPN connection checking. If connection to the selected IP
address is lost, the connection is restarted. Monitor uses ICMP echo (ping) packets to check
the connection. When used with VPN, the remote IP peer address should be used. When it is
used, the monitor checks also the VPN connection.
ICMP Echo sending
– Selects if the monitor is enabled.
Interval (sec)
– Determines how often the connection is checked by sending ICMP echo
packets. The interval must be smaller than GPRS idle timeout (typically 2/3 of GPRS idle
timeout) in order to have uninterrupted communication
Reply timeout (secs)
– The waiting time for reply packets.
Retries timeout (secs)
– The number of tries before connections are restarted.
Target IP address
– The host IP address to which echo packets are sent to. When VPN is
used, the Viola M2M Routers end peer address must be used to check the GPRS connection.
Secondary target IP address
– The secondary host IP address to which ICMP echo packets
are to be sent if the sending to primary target host IP address fails.
Monitor should be always be enabled to make sure that the GPRS connection stays alive.
