Netgear FVS336G-300NAS Specifications Page 110

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Configure the IPv6 Internet and WAN Settings
110
ProSAFE Dual WAN Gigabit WAN SSL VPN Firewall FVS336Gv3
Auto-Rollover for IPv6 WAN Interfaces
You can configure the VPN firewall’s IPv6 interfaces for auto-rollover for increased system
reliability. You must specify one WAN interface as the primary interface.
The VPN firewall supports the following modes for IPv6 interfaces:
Primary WAN mode. The selected WAN interface is made the primary interface. The
other three interfaces are disabled.
Auto-rollover mode. The selected WAN interface is defined as the primary link, and
another interface must be defined as the rollover link. The remaining two interfaces are
disabled. As long as the primary link is up, all traffic is sent over the primary link. When
the primary link goes down, the rollover link is brought up to send the traffic. When the
primary link comes back up, traffic automatically rolls back to the original primary link.
If you want to use a redundant ISP link for backup purposes, select the WAN port that
must function as the primary link for this mode. Ensure that you also configure the backup
WAN port and that you configure the WAN failure detection method to support
auto-rollover.
Note: If the VPN firewall functions in IPv4/IPv6 mode, you cannot configure
load balancing. For information about IPv4/IPv6 mode, see
Manage
the IPv6 Routing Mode on page 88.
To use a redundant ISP link for backup purposes, ensure that the backup WAN interface is
configured. Then select the WAN interface that must function as the primary link for this mode
and configure the WAN failure detection method to support auto-rollover.
When the VPN firewall is configured in auto-rollover mode, it uses the WAN failure detection
method to detect the status of the primary link connection at regular intervals. For IPv6
interfaces, the VPN firewall detects link failure by sending a ping request to an IP address.
From the primary WAN interface, ping requests are sent to the specified IP address. If replies
are not received, after a specified number of retries, the primary WAN interface is considered
down and a rollover to the backup WAN interface occurs. When the primary WAN interface
comes back up, another rollover occurs from the backup WAN interface back to the primary
WAN interface. WAN failure detection applies only to the primary WAN interface, that is, it
monitors the primary link only.
Configure Auto-Rollover Mode for IPv6 WAN Interfaces
The following procedure describes how you can configure auto-rollover mode for IPv6 WAN
interfaces.
To configure auto-rollover mode for IPv6 WAN interfaces:
1. On your computer, launch an Internet browser.
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