Set up “Ethernet Common Configuration”
Item Notes Description
Connection
Control
Mandatory field. There are three connection modes.
Auto-reconnect (Always on) enables the router to always keep the Internet
connection on.
Connect-on-demand enables the router to automatically re-establish Internet
connection as soon as user attempts to access the Internet. Internet connection
will be disconnected when it has been inactive for a specified idle time.
Connect Manually allows user to connect to Internet manually. Internet
connection will be inactive after it has been inactive for specified idle time.
MTU
Mandatory field.
Default setting:
Auto (value zero)
Manual set range
1200 - 1500
MTU refers to Maximum Transmission Unit. It specifies the largest packet size permitted for
Internet transmission.
When set to Auto (value ‘0’), the router selects the best MTU for best Internet connection
performance.
NAT Optional field.
Default setting: NAT
Enable NAT to apply NAT on the WAN connection.
Uncheck the box to disable NAT function.
Network
Monitoring
Optional field.
Enabled by default.
When the Network Monitoring feature is enabled, the gateway will use DNS Query or ICMP
to periodically check Internet connection –connected or disconnected.
Choose either DNS Query or ICMP Checking to detect WAN link.
With DNS Query, the system checks the connection by sending DNS Query packets to the
destination specified in Target 1 and Target 2.
With ICMP Checking, the system will check connection by sending ICMP request packets to
the destination specified in Target 1 and Target 2.
Loading Check
Enable Loading Check allows the router to ignore unreturned DNS Queries or ICMP requests
when WAN bandwidth is fully occupied. This is to prevent false link-down status.
Check Interval defines the transmitting interval between two DNS Query or
ICMP checking packets.
Check Timeout defines the timeout of each DNS query/ICMP.
Latency Threshold defines the tolerance threshold of responding time.
Fail Threshold specifies the detected disconnection before the router recognize
the WAN link down status. Enter a number of detecting disconnection times to
be the threshold before disconnection is acknowledged.
Target1 (DNS1 set by default) specifies the first target of sending DNS
query/ICMP request.
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