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ZyXEL Communications ZyWall USG 50-H Series Manual do Utilizador Página 5

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Non-stop Internet access with
multiple WAN and 3G backups
The ZyWALL USG not only supports
multiple WAN ports but also 3G through
USB or PCMCIA cards. This feature enables
“active-active” load sharing or “active-
passive” failover configuration to deliver
highly reliable network connectivity.
Device HA: Master Fails and Backup Takes Over
High availability
High availability is essential in enterprise
networks. It ensures a system or component
can be continuously operational for a desirably
long length of time.
The ZyWALL USG series provide high
availability feature as:
• Multiple WAN ports and configure load
balancing between these ports.
• An auxiliary (backup) Internet connection as
known as out of band Management .
• A backup ZyWALL in the event the master
ZyWALL fails (device HA).
To minimize the impact of single-point failures,
the ZyWALL USG Series supports device HA
(High Availability) to assure network availability.
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LAN
ZyWALL USG 300
Unified Security
Gateway
Vantage CNM
Centralized Network
Management
Remote Office
Corporate
Headquarters
BRAS
Host by SI or Customer
Operating in
Active/Passive Mode
3
G
N
etwor
k
WAN2 (3G)
WAN1
Primary
Backup
ADSL Fiber
Last-Mile
IPSec or GRE Tunnel for
Secure Connection
ZyWALL USG fail
over and fail back
between WAN1
(ADSL/Fiber) &
WAN2 (3G WAN)
I
nternet
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