peplink Pepwave MAX Series, Руководство пользователя

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When Disabled is chosen in the Method field, the WAN connection will always be considered as up. The
connection will
NOT
be treated as down in the event of IP routing errors.
Health Check Method: PING
ICMP ping packets will be issued to test the connectivity with a configurable target IP address or
hostname. A WAN connection is considered as up if ping responses are received from either one or both
of the ping hosts.
PING Hosts
This setting specifies IP addresses or hostnames with which connectivity is to be
tested via ICMP ping. If Use first two DNS servers as Ping Hosts is checked, the
target ping host will be the first DNS server for the corresponding WAN connection.
Reliable ping hosts with a high uptime should be considered. By default, the first
two DNS servers of the WAN connection are used as the ping hosts.
Health Check Method: DNS Lookup
DNS lookups will be issued to test connectivity with target DNS servers. The connection will be treated as
up if DNS responses are received from 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 addresses 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, Host 1 must be filled, while a value for Host 2 is optional.
If
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 as 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: HTTP