Compex Systems 802.11N - Manual (Page 76)

Appendix IV- Services
This section provides more details on the system management services.
Ping WatchDog
The ping watchdog sets the device to continuously ping a user 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 kind of "fail-proof" mechanism.
Ping Watchdog is dedicated for continuous monitoring of the particular connection to 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 Ping Watchdog Tool.
IP Address To Ping: enter the target host IP address to monitor.
Ping Interval: specify time interval (in seconds) between to send the ICMP “echo requests”.
Startup Delay: specify 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. Device contains an
SNMP agent which allows it to communicate to SNMP manage applications for network
provisioning.
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). SNMP Agent allows network administrators to monitor network
performance, find and solve network problems. For the purpose of equipment identification, it is
always a good idea to configure SNMP agents with contact and location information:
Enable SNMP Agent: control will enable SNMP Agent.
SNMP Community: specify SNMP community string. It is required to authenticate access to
MIB objects and functions as embedded password. The device supports a Read-only community
string that gives read access to authorized management stations to all the objects in the MIB
except the community strings, but does not allow write access for device that supports SNMP v1.
Contact: specify the identity or contact in case an emergency situation arise.
Location: specify the physical location of the device.