debug ipv6 ospf ism
Displays debug information about the interface state machine (ISM).
Modes
Privileged EXEC mode
Examples
device# debug ipv6 ospf ism
OSPFv3: ism debugging is on
Debug: Dec 9 10:47:25 OSPFv3: ISM[14368]: InterfaceDown
Debug: Dec 9 10:47:25 OSPFv3: ISM[14368]: Status change BDR -> Down (Configured)
Debug: Dec 9 10:47:25 OSPFv3: ISM[14368]: {dr:7.0.0.3,bdr:1.0.0.1} -> {dr:0.0.0.0,bdr:0.0.0.0}
Debug: Dec 9 10:47:40 OSPFv3: ISM[14368]: InterfaceUp
Debug: Dec 9 10:47:40 OSPFv3: ISM[14368]: Status change Down -> Waiting (Priority > 0)
Debug: Dec 9 10:47:40 OSPFv3: ISM[14368]: Start Wait_Timer at 639966, 619070
Debug: Dec 9 10:47:44 OSPFv3: ISM[14368]: BackupSeen
Debug: Dec 9 10:47:44 OSPFv3: ISM[14368]: Status change Waiting -> DROther (BackupSeen:DR Election)
Debug: Dec 9 10:47:44 OSPFv3: ISM[14368]: {dr:0.0.0.0,bdr:0.0.0.0} -> {dr:7.0.0.3,bdr:1.0.0.11}
Debug: Dec 9 10:47:44 OSPFv3: ISM[14368]: NeighborChange
Debug: Dec 9 10:47:44 OSPFv3: ISM[14368]: Status change DROther -> DROther (NeighborChange:DR Election)
Debug: Dec 9 10:47:44 OSPFv3: ISM[14368]: NeighborChange
Debug: Dec 9 10:47:44 OSPFv3: ISM[14368]: Status change DROther -> DROther (NeighborChange:DR Election)