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Stinger® ADSL 48-Port Annex C LIM Guide
Configuring LIM and LIM Port Redundancy
Configuring LIM redundancy
In the same way, a system can be set up with the following module pairs:
•
6 SDSL LIM–LPM-RP pairs
•
1 SDSL–PSM pair or SDSL–CLT module pair
•
6 ADSL LIM–LPM-RP pairs
•
1 ADSL–PSM pair or ADSL–CLT module pair
The resulting system has 6 active SDSL LIMs and 6 active ADSL LIMs, with 1 spare LIM of
each type available in case of failure.
When the redundancy function is invoked, the primary LIM is deactivated. Its logical
connections are terminated and reestablished on the spare (secondary) LIM. When the
redundancy function is disabled, the spare LIM is deactivated. Its logical connections are
terminated and reestablished on the primary LIM.
Figure 2-1 illustrates LIM redundancy for a failed SDSL LIM in slot 4 of a Stinger FS chassis.
A Stinger LS chassis has its LPMs and PSMs or CLT modules next to its LIMs rather than
behind them.
Figure 2-1. LIM redundancy in a Stinger FS
Overview of the LIM-Sparing-Config profile
When a Stinger unit is booted, it checks for the presence of PSMs or CLT modules. A
LIM-Sparing-Config profile is created for each PSM or CLT module detected. You manage
LIM redundancy by configuring the LIM-Sparing-Config profile on a spare LIM of the same
type as the LIM to be backed up.
