
63
Appendix III- Services
This section provides more details on the system management services.
Ping WatchDog
The ping watchdog sets the device to co
ntinuously ping a user’s defined IP address (it can be the
internet gateway for example). If it is unable to ping under the user defined constraints, the device
will automatically reboot. This option creates a "fail-proof" mechanism.
Ping watchdog is dedicated for continuous monitoring of a particular connection to a remote host
using the ping tool. The ping works by sending ICMP “echo request” packets to the target host
and listening for ICMP “echo response” replies. If the defined number of replies is not received,
the tool reboots the device.
Enable Ping Watchdog:
Control will enable the ping watchdog tool.
IP Address to Ping:
Enter the target host IP address to monitor.
Ping Interval:
Specify the time interval (in seconds) between to send the ICMP
“echo
requests”.
Startup Delay:
Specify the initial time delay (in seconds) from device startup or reboot to
start sending first ICMP “echo requests”. Minimum value is 60 seconds.
Failure Count to Reboot:
Specify the number of ICMP “echo response” replies. If the
specified number of ICMP “echo response” packets is not received continuously, the ping
watchdog tool will reboot the device.
SNMP Agent
Simple Network Monitor Protocol (SNMP) is used in network management systems to monitor
network-attached devices for conditions that warrant administrative attention. The device contains
an SNMP agent which allows it to communicate to SNMP management applications for network
provisioning.
The SNMP agent provides an interface for device monitoring using the simple network
management protocol (an application layer protocol that facilitates the exchange of management
information between network devices). An SNMP agent allows network administrators to monitor
network performance to find and solve network problems. For equipment identification purposes,
it is always a good idea to configure SNMP agents with contact and location information.
Enable SNMP Agent:
Control will enable the SNMP agent.
SNMP Community:
Specify the SNMP community string. It is required to confirm access
to MIB objects and functions as the embedded password. The device supports a
read-only community string that gives read access to authorized management stations
and to all the objects in the MIB except the community strings, but does not allow writing
access for devices that supports SNMP v1.
Contact:
Specify the identity or contact in case an emergency situation arises.
Location:
Specify the physical location of the device.