Hello,
my costumer is working with a 6509-E chassis running two WS-SUP720-3B with 12.2(33)SXI2a.
Redundancy mode is SSO but the state is DISABLED, why?

c6500-P3b#show redundancy states
       my state = 13 -ACTIVE
     peer state = 1  -DISABLED
           Mode = Simplex
           Unit = Primary
        Unit ID = 5

Redundancy Mode (Operational) = sso
Redundancy Mode (Configured)  = sso
Redundancy State              = Non Redundant
     Maintenance Mode = Disabled
Communications = Down      Reason: Simplex mode

   client count = 119
client_notification_TMR = 30000 milliseconds
          keep_alive TMR = 9000 milliseconds
        keep_alive count = 0
    keep_alive threshold = 18
           RF debug mask = 0x0 

How can I start troubleshooting?

Thanks.

Andrea