Avaya 3.7 ユーザーズマニュアル

Failover TEP is used to protect site-to-site VPN traffic that moves through the public networks. 
The endpoints for tunnels are located in SGs. Up to four head-end devices can be configured to 
backup a specific security gateway. 

Upon completion of the Failover TEP configuration, the VPNmanager will download identical 
VPN configuration to the alternate head-end devices. When a remote device fails at the primary 
head-end, the alternate head-end device will provide the same VPN services.

The most desirable configuration would include the same devices; however, this is not required 
as long as each device has a license to service the number of VPNs configured on the primary 
head-end device. For example, if the head-end device is an SG203 and supports 8000 tunnels, 
the alternate head-end devices should be SG203 support 8000 tunnels. If the head-end device 
is a VSU100, the alternated head-end devices should be VSU100s. For more information 
regarding configuring VSUs with a similar Failover TEP configuration, see 

Note:

Beginning with VPNmanager 3.6, Failover TEP is configurable on security 
gateways running VPNos 4.5.