NETGEAR UTM5EW-100NAS Appliance Reference Manual page 75

Table 3-5. Auto-Rollover Mode Settings (Dual-WAN Port Models Only) (continued)
Setting
WAN Failure Detection Method
Select one of the following detection failure methods:
DNS lookup using
WAN DNS Servers
DNS lookup using
this DNS Server
Ping these IP
addresses
Manually Configuring Internet and WAN Settings
ProSecure Unified Threat Management (UTM) Appliance Reference Manual
Description (or Subfield and Description)
DNS queries are sent to the DNS server configured on the WAN ISP pages (see
"Configuring the Internet Connections" on page
DNS queries are sent to this server through the WAN interface being monitored.
The retry interval and number of failover attempts determine how quickly the UTM
switches from the primary link to the backup link in case the primary link fails, or
when the primary link comes back up, switches back from the backup link to the
primary link.
Enter the following DNS settings:
WAN1 The IP address of the DNS server for port WAN1.
WAN2 The IP address of the DNS server for port WAN2.
Retry Interval is The retry interval in seconds. The DNS query is sent
periodically after every test period. The default test period is
30 seconds.
Failover after The number of failover attempts. The primary WAN link is
considered down after the configured number of queries have
failed to elicit a reply. The backup link is brought up after this
has occurred. The failover default is 4 failures.
A public IP address that does not reject the ping request and does not consider
ping traffic to be abusive. Queries are sent to this server through the WAN
interface that is being monitored. The retry interval and number of failover
attempts determine how quickly the UTM switches from the primary link to the
backup link in case the primary link fails, or when the primary link comes back up,
switches back from the backup link to the primary link.
Enter the following DNS settings:
WAN1 The IP address of the DNS server for port WAN1.
WAN2 The IP address of the DNS server for port WAN2.
Retry Interval is The retry interval in seconds. The ping is sent periodically
after every test period. The default test period is 30 seconds.
Failover after The number of failover attempts. The primary WAN link is
considered down after the configured number of queries have
failed to elicit a reply. The backup link is brought up after this
has occurred. The failover default is 4 failures.
v1.0, January 2010
3-2).
3-13