Selecting a permanent WAN link as the primary WAN connection
735
Programming Operations Guide
7
Press the
Tab
key to save the settings.
Down Poll
Interval
Allows you to set the polling interval on the Primary WAN Link, in seconds, when the primary
WAN link is down, and the backup (dial-up) WAN link is operational.
A short interval provides faster recovery.
Switch Over
Delay
Allows you to define the interval, in seconds, that Net Link Manager waits before switching back
to the primary WAN link when it becomes available. This delay is to let the router at the other end
of the primary link recognize that the primary link has come up and allows for necessary routing
table updates. The default value is
30
seconds.
Backup Dial-up
Interface
Allows you to select which dial up interface to use for WAN backup.
You must configure a backup interface before you can select it. When you are configuring the
backup interface, make sure you include “backup” in the interface name. Only interfaces that
contain the word backup in their name appear on this list. For information about how to create an
ISDN backup interface, refer to
“Creating an ISDN dial up interface” on page 695
.
Fast Backup
Switch Over
Allows you enable or disable the Fast Backup Switch Over feature.
When Fast Backup Switch Over is enabled, Business Communications Manager uses the Link
Status of the WAN interface to reduce the amount of time it takes to switch over to the Backup
WAN Link, when the Primary WAN Link is down.
When Fast Backup Switch Over is
Disabled
, Business Communications Manager retries
contacting the next hop router if there is no response from the previous attempt. If there is no
response after several retries, Business Communications Manager switches over to the Backup
WAN Link.
When Fast Backup Switch Over is
Enabled
, Business Communications Manager checks the Link
Status of the WAN interface when there is no response from the next hop router. If the Link
Status is Down, Business Communications Manager immediately switches over to the Backup
WAN link. If the link status is
Up
, Business Communications Manager attempts to contact the
next hop router again. If there is no response after several retries, Business Communications
Manager switches over to the Backup WAN Link.
Note: PPP active/WAN link switch over delay issue:
If you enable Fast Backup Switch Over
on a WAN link that is using PPP protocol, change the setting for LCP Keep Alive Interval to 3.
This reduces the time it takes for Business Communications Manager to determine that the WAN
link is not functioning to 30 seconds (3 seconds X 10 intervals). If you leave the LCP Keep Alive
Interval at its default value, the Business Communications Manager takes 100 seconds (10
seconds X 10 intervals) to determine that the WAN link is not functioning.
Note
: If Business Communications Manager receives a response from the next hop router on any
attempt, it does not switch over to the Backup WAN Link.
The default setting is
Disabled
.
Note
: The Fast Backup Switch Over feature does not affect how Business Communications
Manager switches from the Backup WAN Link to the Primary WAN Link.
Table 213
Permanent WAN Connections settings (Continued)
Attribute
Description
Содержание BCM 3.7
Страница 1: ...Part No N0008589 3 3 December 2006 Business Communications Manager 3 7 Programming Operations Guide...
Страница 4: ...4 Software licensing N0008589 3 3...
Страница 32: ...32 Contents N0008589 3 3 W 937 Index 939...
Страница 46: ...46 Tables N0008589 3 3...
Страница 64: ...64 How to get help N0008589 3 3...
Страница 90: ...90 Manually activating Telnet N0008589 3 3...
Страница 116: ...116 Delayed system restart N0008589 3 3...
Страница 194: ...194 Configuring a data module N0008589 3 3...
Страница 276: ...276 Setting line telco features N0008589 3 3...
Страница 310: ...310 Using COS passwords N0008589 3 3...
Страница 364: ...364 Enhanced 911 E911 configuration N0008589 3 3...
Страница 380: ...380 Renumbering DNs N0008589 3 3...
Страница 398: ...398 Saving wizard pages on your computer N0008589 3 3...
Страница 458: ...458 Voice Mail settings N0008589 3 3...
Страница 488: ...488 Setting system telco features N0008589 3 3...
Страница 508: ...508 Other programming that affects public networking N0008589 3 3...
Страница 522: ...522 PRI networking using Call by Call services N0008589 3 3...
Страница 592: ...592 Monitoring Hunt groups N0008589 3 3...
Страница 636: ...636 Configuring Double Density N0008589 3 3...
Страница 640: ...640 Using the Network Update Wizard N0008589 3 3...
Страница 666: ...666 Importing and Exporting DHCP data N0008589 3 3...
Страница 722: ...722 Restarting the router N0008589 3 3...
Страница 726: ...726 Important Web Cache considerations N0008589 3 3...
Страница 748: ...748 Configuring an Interface with NAT N0008589 3 3...
Страница 794: ...794 IPSec N0008589 3 3...
Страница 818: ...818 Configuring the Policy Agent characteristics N0008589 3 3...
Страница 832: ...832 Firewall rules for Business Communications Manager with Dialup interfaces N0008589 3 3...
Страница 876: ...876 ISDN Programming N0008589 3 3...
Страница 1004: ...1004 Index N0008589 3 3...