User Manual

USER MANUAL

Peplink Balance Series

Health Check Method: DNS Lookup

DNS lookups will be issued to test the connectivity with target DNS servers. The connection will be

treated as up if DNS responses are received from either one or both of the servers, regardless of

whether the result was positive or negative.

Health Check DNS

Servers

This field allows you to specify two DNS hosts’ IP address with which connectivity

is to be tested via DNS Lookup.

If Use first two DNS servers as Health Check DNS Servers is checked, the first

two DNS servers will be the DNS lookup targets for checking a connection's

health. If the box is not checked, field Host 1 must be filled and field Host 2 is

optional.

If the box Include public DNS servers is selected and no response is received

from all specified DNS servers, DNS lookups will also be issued to some public

DNS servers. A WAN connection will be treated as down only if there is also no

response received from the public DNS servers.

Connections will be considered up if DNS responses are received from any one of

the health check DNS servers, regardless of a positive or negative result.

By default, the first two DNS servers of the WAN connection are used as the

Health Check DNS Servers.

Health Check Method: SmartCheck

SmartCheck applies only to the Peplink Balance 20/30/380 or above Mobile Internet connection. It

monitors the link status, and is optimized for mobile networks with high traffic latency.

Other Health Check Settings

Timeout

This setting specifies the timeout, in seconds, for ping/DNS lookup requests. Default

Timeout is set to 5 seconds.

Health Check

Interval

This setting specifies the time interval, in seconds, between ping or DNS lookup requests.

Default Health Check Interval is 5 seconds.

Health Check

Retries

This setting specifies the number of consecutive ping/DNS lookup timeouts after which

Peplink Balance is to treat the corresponding WAN connection as down. Default Health

Retries is set to 3.

For example, with the default Health Retries setting of 3, after consecutive 3 timeouts, the

corresponding WAN connection will be treated as down.