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NE40E V800R010C10SPC500 Feature Description - Network Reliability 01

This is NE40E V800R010C10SPC500 Feature Description - Network Reliability
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Auto Protocol

Auto Protocol

The MPLS OAM auto protocol is a Huawei proprietary protocol.

On the NE40E, the OAM auto protocol can address the following problems, which occur because of drawbacks of ITU-T Recommendations Y.1710 and Y.1711:

  • A dLOCV defect occurs if the OAM function is enabled on the ingress on an LSP later than that on the egress or if OAM is enabled on the egress and disabled on the ingress.

  • The dLOCV defect also occurs when OAM is disabled. OAM must be disabled on the ingress and egress before the OAM detection packet type or the interval at which detection packets are sent can be changed.

  • OAM parameters, including a detection packet type and an interval at which detection packets are sent must be set on both the ingress and egress. This is likely to cause a parameter inconsistency.

The OAM auto protocol enabled on the egress provides the following functions:
  • Triggers OAM
    • If the sink node does not support OAM CC and CC parameters (including the detection packet type and interval at which packets are sent), upon the receipt of the first CV or FFD packet, the sink node automatically records the packet type and interval at which the packet is sent and uses these parameters in CC detection that starts.
    • If the OAM function-enabled sink node does not receive CV or FFD packets within a specified period of time, the sink node generates a BDI packet and notifies the NMS of the BDI defect.
  • Dynamically stops running the OAM. If the detection packet type or interval at which detection packets are sent is to be changed on the source node, the source node sends an FDI packet to instruct the sink node to stop the OAM state machine. If an OAM function is to be disabled on the source node, the source node also sends an FDI packet to instruct the sink node to stop the OAM state machine.
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Updated: 2019-01-03

Document ID: EDOC1100055045

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