Cabletron Systems SmartSwitch 1800 User Manual - page 90
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SmartSwitch 1800 4. 0 User G uide, Rev 01
Configuring Frame Relay Backup Groups
A Frame Relay Backup Group is one or more DLCIs that can act as a backup for one
or more "primary" DLCIs. If a node detects a failure in a primary DLCI connection,
the software will search the backup group configured for the primary DLCI, and will
select the first available DLCI in that group as a backup. The backup will become
operational and will remain in that state until the primary becomes active again. If the
backup fails while in use, the software will check the status of the primary, then (if
necessary) search the primary's backup group for another backup.
Any sessions in progress when a primary DLCI goes down will not be
transferred directly to the backup DLCI, but will be reset, then established
on the backup.
To review existing backup groups, press
[A]
at the Frame Relay Backup Groups Con-
figuration Menu (or
[A], [E], [A]
from the Main Menu).
To configure a backup group, press
[B]
at the Frame Relay Backup Groups Configu-
ration Menu. When prompted, enter a
Frame Relay Backup Group Number
:
1–255
. (The
default is
1
.)
Backup Group Parameters
1
The DLCI must have already been created in the Port record. Also, a DLCI cannot be
assigned to more than one backup group, nor can it be assigned to a backup group if it is
a primary DLCI (one that will be backed up).
2
See explanation.
Entry
is simply an identifier.
Port
is the physical port on which the backup DLCI is being configured.
DLCI
is the backup being configured.
WaitTimer
is the time after a primary DLCI failure that the software will wait for this DLCI to
become active before checking the next backup DLCI. If the backup does not become
Table 7-6 Frame Relay Backup Group Parameters
Parameter
Valid Values
Default Value
Entry
0–9
0
Port
Voice models:
0–3
Data-only models:
0–7
0
DLCI
16–991
1
16
WaitTimer
0–65535
(seconds)
120
Pr otEnab
Y/N
N
2
Del ete?
allows deleting an entry
n/a
n/a