Installation and Operation Manual
Appendix
F Alarm Forwarding
ACE-3105, ACE-3205 Ver. 5.2
1BPSN-to-ATM Alarm Forwarding
F-3
Figure
F-6. PW Link Failure in case of VC Segment Point
Figure
F-7. Physical ETH Failure in case of VP Segment Point
Figure
F-8. Physical ETH Failure in case of VC Segment Point
VCCV-BFD Connectivity Check
The PW link connectivity check and alarm forwarding over a packet-switched
network is performed as follows (see
):
1.
BFD control messages (packets) are generated per PW by both ACE-3105,
ACE-3205 and the remote ACE unit, each towards the PSN direction.
2.
When ACE-3105, ACE-3205 does not receive the BFD control messages from
the remote ACE unit during a number (predefined) of transmission intervals,
it declares that the specific PW is down on its receive (RX) direction.
3.
ACE-3105, ACE-3205 generates 'control-detection-time-expired' packets for
the specific faulty PW towards the remote ACE.
4.
The remote ACE declares a 'neighbor-signal-session-down' state for the PW,
and, when possible, sends corresponding packets under this label.