Configuring the WAN Interface
46
BODi rS BD1000 User Manual
3 • Configuring LAN & WAN Interfaces
WAN Health Check
To ensure that traffic is routed only to healthy WAN connections, the BD1000 provides the functionality to
periodically check the health of each WAN connection. The Health Check settings for each WAN connection
can be independently configured. To configure WAN Health Check settings, click on
Network > Interfaces >
WAN
in the Web Admin Interface. Then, click on the
Details
button in the row of the desired WAN connec-
tion in the
WAN Connection Status
table. The configuration page for that WAN connection displays, which
includes the
Health Check
options.
Health Check Methods
The
Health Check
drop-down menu specifies the health check method for the WAN connection. Available
methods include
Disabled
,
Ping
, or
DNS Lookup
. The default value is
DNS Lookup
.
Table 17. WAN: Health Check Methods
Method
Description
Disabled
Select the
Disabled
option
so that the WAN connection will always be considered as
“up.” The connection will not be treated as down in the event of IP routing errors.
Ping
Select the
Ping
method to issue ICMP PING packets to test the connectivity of a target
IP address or hostname. A WAN connection is considered “up” if PING responses are
received from either one or both of the PING Hosts.
The
Ping Hosts
field specifies the IP addresses or hostnames to test with the ICMP
PING method for connectivity.
If you select the
Use first two DNS servers as Ping Hosts
box, the target PING
Host will be the first DNS server for the corresponding WAN connection.
DNS Lookup
Select the
DNS Lookup
method 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.
The
Health Check DNS Servers
field allows you to specify two DNS hosts’ IP
address with which connectivity is to be tested via DNS Lookup.
If you select the
Use first two DNS servers as Health Check DNS Servers
box, the first two DNS servers will be the DNS lookup targets for checking a connec-
tion's health. If the box is not checked, field Host 1 must be filled and field Host 2 is
optional.
If you select the
Include public DNS servers
box and no response is received from
all specified DNS servers, DNS lookups will also be issued to some public DNS serv-
ers. A WAN connection will be treated as “down” only if there is 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.
