АМАТЕК AN-SGM28P24-400 [146/322] Link recovery

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enter the protection state。

10.3.3 Link recovery

(1)

When the fault is resumed, the neighboring nodes of the fault continue to block and send

RAPS (NR) messages to indicate that there is no local fault；

(2)

After the guard timer runs out, the RPL Owner node starts the WTR timer after the first

RAPS (NR) message is received；

(3)

When the WTR timer runs out, the RPL Owner node blocks the RPL and sends RAPS

(NR, RB) messages；

(4)

When other nodes receive this message, they update their respective MAC table entries,

and the node that sends the RAPS (NR) message stops sending messages periodically and opens

the previously blocked ports. The ring network has returned to its original normal state。