Figure 1-9: Failover Within A Bsc Pair; Figure 1-10: Recovery Of The Failed Bsc - ADTRAN BlueSecure Controller Setup And Administration Manual

Chapter 1: An Overview of the BlueSecure Controller
Within either single- or multiple-BSC networks, you can set up pairs of redundant BSCs
(must be the same model) to achieve fault tolerance as shown in Figure 1-8. Within a
failover configuration, the primary BSC is active and the secondary BSC is idle.
Failover is initiated when the primary and secondary BSCs are unable to contact each
other via the failover port. Typically, this is due to a failure of the primary BSC.
Disconnecting the managed or protected interface cable will cause a failover.
Note: When failover occurs, users with an IPSec connection will need to restart their
tunnel. However, network availability is maintained during failover.
When the secondary BSC takes over, its role changes and it functions as the primary. If
the original primary recovers (see figure below), it becomes the secondary. Therefore, no
manual intervention is needed to "reset" roles when the original primary BSC recovers.
BSC mounting and network connection procedures are provided in Chapter 2,
"Installation." After completing the physical connections, follow the single BSC network
configuration instructions given in "Single BSC Configuration" on page 1-10 (the failover
BSC configuration procedure is identical to that described for single-BSC networks).
No software configuration of the secondary BSC is required; any changes in software
settings are automatically propagated to the secondary BSC from the primary BSC.
1-12
7x 8x 9x 10x 11x 12x 7x 8x 9x 10x 11x
C
7 8 9 1011 12
A 1 2 3 4 5 6 1x 2x 3x 4x 5x 6x 1x 2x 3x 4x 5x
A B
Switch/
Hub
Wireless Access
Points
Managed Side

Figure 1-9: Failover within a BSC Pair

7x 8x 9x 10x 11x 12x 7x 8x 9x 10x
C
7 8 91011 12
A 1 2 3 4 5 6
1x 2x 3x A 4x 5x 6x 1x 2x 3x B 4x
Switch/
Hub
Wireless Access
Points
Managed Side

Figure 1-10: Recovery of the Failed BSC

Failover
BSC-A Failed
Power Reset
WG-2100 Wireless Gateway
Failover Ports
12x
6x
Reset
Power
WG-2100 Wireless Gateway
BSC-B Takes Over as Primary (Active)
Recovery
BSC-A Secondary (Standby)
Power Reset
WG-2100 Wireless Gateway
Failover Ports
11x 12x
5x 6x
Power Reset
WG-2100 Wireless Gateway
BSC-B Primary (Active)
Enterprise
Network
Switch
POWERFAULT DATA ALARM
Protected Side
Enterprise
Network
Switch
POWERFAULT DATA ALARM
Protected Side