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Nortel Business Secure Router 252 Configuration — Basics
Chapter 7
WAN screens
This chapter describes how to configure WAN settings.
WAN overview
This section provides background information on features that you cannot
configure in the Wizard.
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.
1 The metric sets the priority for the routes of the Business Secure Router to the
Internet. Each route must have a unique metric.
2 The priority of the WAN port route must always be higher than the dial
backup and traffic redirect route priorities.
If the WAN port 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 WAN port route acts as the
primary default route. If the WAN port route fails to connect to the Internet, the
Business Secure Router tries the traffic redirect route next. In the same manner,
the Business Secure Router uses the dial backup route if the traffic redirect route
also fails.
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