Cabletron Systems WPIM-S/T, Руководство пользователя

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Chapter 3: Local Management
3-18 WPIM-S/T User’s Guide
BACKUPOVERRIDE
Specifies if the backup interface will disconnect whenever the primary
interface is restored (reconnected). Choosing ENABLED for this
command will not disconnect the backup interface even though the
primary interface is restored. Used specifically when the primary
interface has an intermittent problem, as it is desirable for the backup
interface to stay connected until the primary interface problem is
corrected. Once the primary connection is fully operational,
BACKUPOVERRIDE should be set to DISABLED, the default value.
Example 1:
There is a nailed-up PPP interface #3, and to back it up, ISDN interface
#4 is used with the default values. Use this Network Tools command:
setbackup 3 4
Example 2:
For answer mode only:
setbackup 3 to 3
Answer mode only is set. This will set the backup interface to itself if the
ISDN interface is to be used only as a dial-in circuit (i.e., answer mode
only).
NOTE
For any switched medium like ISDN there are two types of
interfaces, primary and secondary (backup). Primary interfaces
automatically attempt to connect using DoD. Because of this, it
is recommended not to create any unnecessary interfaces
because they will consume unnecessary time in trying to
connect. However, if additional interfaces have been created for
which their need is unknown, then DoD should be disabled. To
do this, set the backup interface to itself. e.g., setbackup 12 12.
Do this for each interface that should have DoD disabled. This
recommendation also applies to Dial-in only interfaces (i.e.,
answer mode interfaces.
NOTE
If the interface is active, you cannot configure backup.
De-activate the interface before proceeding.