7-22 Smart Switch 1800 4. 0 User Guide , Rev 0 1
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 t he 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 confi g ure a b ackup gr oup, pr ess [B] at the Frame Relay Backup Groups Configu-
rati on Me nu . W hen prom pte d , e n t e r a F rame Relay Backup Gr oup Number: 1–255. ( Th e
default is 1.)

Backu p Grou p Param eters

1The 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).
2See explanation.
Entr y
is simply an identifier.
Port
is the physical port on which the backup DLCI is being configured.
DLCI
is the backup being configured.
WaitTi mer
is the time after a primary DLCI failure that the software will wait for this DLCI to
become active before checkin g the next backu p DLCI. If the backu p does not becom e
Table 7- 6 Frame R e lay Bac k up Grou p Param eters
Param eter Val id Values Default Va l ue
Entry 0–9 0
Port Voice models: 0–3
Data-only models: 0–7 0
DLCI 16–99 1 116
WaitTi mer 0–65535 (seconds) 120
ProtEna b Y/N N 2
Delete? allows deleting an entry n/a n/a