Efficient Networks 5800 Series Manual de usuario descargar pdf (Pagina 16)

Dod/Pritchard Communications

Efficient University Technical Track Copy

-- Draft 4: September 5, 2001--

Gateway High Availability Features

The Efficient Networks 5950 SHDSL Business Gateway includes advanced, high availability Dial Backup and

VRRP features that enable uninterrupted communications service. Complete information about these features

appears in Module 5: Advanced Router Features.

Dial Backup

Dial Backup provides a backup connection to the Internet through an external V.90 or ISDN modem, connected to

the console port of the gateway. This backup connection can be activated in the event of a DSL service interruption.

During an interruption, the gateway uses the dialup modem connection while waiting for DSL service to be restored.

Once the DSL link is live, Dial Backup automatically switches data flow back to the DSL service.

VRRP

When a gateway is the only means for routing available, it becomes the critical link in the network. If the gateway or

its DSL connection fails, the link and connection are broken. To protect against this kind of failure, it’s often

appropriate to set up other gateways or routers as backups, ones that can serve as the default gateway if the primary

gateway is unavailable. Virtual Redundant Routing Protocol (VRRP) enables the 5950 SHDSL Business Gateway to

define an alternate data path in the event that its connection is interrupted for any reason.

[End of Module 3 Lesson Copy]

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Efficient Networks 5800 Series Manual de usuario Pagina 16