Table of Contents
Advertisement
You will see different WAN screens depending on whether you're configuring a ZyWALL or Prestige device.
Be extremely vigilant when configuring a device's WAN as an incorrect configuration
could result in the device being inaccessible from Vantage (or by the web configurator
from the WAN) and may necessitate a site visit to correct.
8.1
General WAN – ZyWALL
TCP/IP Priority (Metric)
The metric represents the "cost of transmission". A router determines the best route for transmission by choosing
a path with the lowest "cost". RIP routing uses hop count as the measurement of cost, with a minimum of "1" for
directly connected networks. The number must be between "1" and "15"; a number greater than "15" means the
link is down. The smaller the number, the lower the "cost".
The metric sets the priority for the ZyXEL device's routes to the Internet. If any two of the default routes have
the same metric, the ZyXEL device uses the following pre-defined priorities:
1. Normal route: designated by the ISP.
2. Traffic-redirect route. Traffic redirect forwards WAN traffic to a backup gateway when the ZyXEL device
cannot connect to the Internet through its normal gateway. Connect the backup gateway on the WAN so that
the ZyXEL device still provides firewall protection.
3. Dial-backup route.
For example, if the normal route has a metric of "1" and the traffic-redirect route has a metric of "2" and dial-
backup route has a metric of "3", then the normal route acts as the primary default route. If the normal route fails
to connect to the Internet, the ZyXEL device tries the traffic-redirect route next. In the same manner, the ZyXEL
device uses the dial-backup route if the traffic-redirect route also fails.
If you want the dial-backup route to take first priority over the traffic-redirect route or even the normal route, all
you need to do is set the dial-backup route's metric to "1" and the others to "2" (or greater).
Configuration > WAN
8 Configuration > WAN
Vantage CNM 2.0
8-1
Advertisement
Table of Contents
