User's Manual

Pepwave MAX and Surf User Manual

http://www.pepwave.com

9.4 WAN Health Check

To ensure traffic is routed to healthy WAN connections only, the Pepwave router can

periodically check the health of each WAN connection. The health check settings for

each WAN connection can be independently configured via Network>WAN>Details.

Health Check Settings

Method

This setting specifies the health check method for the WAN connection. This value can be

configured as Disabled, PING, DNS Lookup, or HTTP. The default method is DNS

Lookup. For mobile Internet connections, the value of Method can be configured as

Disabled or SmartCheck.

Health Check Disabled

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.