The maximum number of protection groups that can be switched at the same time in common ODUk ring protection

Common ODUk ring protection supports the switchover of a maximum of six protection groups and a maximum of 16 nodes due to switching efficiency considerations.
At present, the committed protection switching time of common ODUk ring protection is within 50 ms. If more than 6 protection groups are configured, the protection switching efficiency will decrease and the protection switching time may exceed the threshold.
The restriction on the number of nodes (16) is intended to limit the fiber length so as to prevent the protection switching from exceeding the committed time.

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