Cisco Systems 8600 Series manual Signaling, Alarms

Management

Connection Management

The NNI cell format has 12 bits for the VPI, so addcon allows specification of VPI 0-4095 on NNI ports.

Signaling

System software supports the following LMI/ILMI signaling actions:

•Internal network failure: software informs LMI/ILMI to set A bit = 0 for failed connections. Software informs ASI-1 to transmit AIS to port for failed connections.

•Port failure/LMI Comm Failure: software informs remote nodes terminating all affected connections. Remote node BCC informs LMI/ILMI to set A bit = 0, and ASI-1 to transmit AIS.

•LMI A = 0: software polls ILMI agent periodically for A-bit status. Status changes are reflected in the ‘dspcon’ screen.

Alarms

LMI communication failure on an ASI-1 causes declaration of a minor alarm. The dspport screen shows the failure, as does the dspalms screen.

A-bit = 0 on an NNI port causes declaration of a minor alarm. The dspcon, dspcons, and dspalms screens show this failure.

12-18Cisco BPX 8600 Series Reference