ZyXEL Communications P-660W-T1 v2, Руководство пользователя

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Chapter 7 WAN Setup
P-660W-Tx v2 User’s Guide
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7.5 WAN Technical Reference
This section provides some technical background information about the topics covered in this
chapter.
7.5.1 Encapsulation
Be sure to use the encapsulation method required by your ISP. The ZyXEL Device supports
the following methods.
Recovery Interval When the ZyXEL Device is using a lower priority connection (usually a WAN
backup connection), it periodically checks to whether or not it can use a higher
priority connection.
Type the number of seconds (30 recommended) for the ZyXEL Device to wait
between checks. Allow more time if your destination IP address handles lots of
traffic.
Timeout Type the number of seconds (3 recommended) for your ZyXEL Device to wait for a
ping response from one of the IP addresses in the Check WAN IP Address field
before timing out the request. The WAN connection is considered "down" after the
ZyXEL Device times out the number of times specified in the Fail Tolerance field.
Use a higher value in this field if your network is busy or congested.
Traffic Redirect Traffic redirect forwards traffic to a backup gateway when the ZyXEL Device cannot
connect to the Internet.
Active Select this check box to have the ZyXEL Device use traffic redirect if the normal
WAN connection goes down.
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If you activate traffic redirect, you must configure at
least one Check WAN IP Address.
Metric This field sets this route's priority among the routes the ZyXEL Device uses.
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".
Backup Gateway Type the IP address of your backup gateway in dotted decimal notation. The
ZyXEL Device automatically forwards traffic to this IP address if the ZyXEL
Device's Internet connection terminates.
Back Click Back to return to the previous screen.
Apply Click Apply to save the changes.
Cancel Click Cancel to begin configuring this screen afresh.
Table 27 WAN Backup (continued)
LABEL DESCRIPTION