Vigor3900 Series User’s Guide
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The High Availability (HA) feature in Vigor3900 can ensure the business continuity for your
organization. IT staff can use HA as a simple solution for the disaster recovery. Vigor3900
utilizes the Common Address Redundancy Protocol (CARP) to avoid the system crashing
which could stop the normal operation and then cause considerable lost of the entire
organization.
When the HA feature is enabled, the network administrator can set another Vigor3900(s) as
the backup device(s) to deliver full routing services during the shutdown of the main
Vigor3900. The network administrator can use a Virtual IP (e.g. 192.168.1.100) for both
master device and backup device. During the system uptime, the master device (e.g.
192.168.1.1) can offer services and act as the Virtual IP. Once the master device is
temporarily out-of-service, the backup device(s) (e.g. 192.168.1.5) will take over the service
that the Virtual IP does and deliver all routing functions.
Note:
Make sure the WAN interfaces for both Router A and Router B are well
connected. Both routers can be used to access into Internet.
Note:
For advanced applications, please refer to FAQ/Application Notes on
www.draytek.com.
VoIPon www.voipon.co.uk [email protected] Tel: (0)330 088 0195 Fax: +44 (0)1245 808299
