Precautions for DCN subnet division

Take the following precautions during DCN subnet division:
Ensure that the number of NEs in a DCN subnet is within the recommended range.
Disable the DCC and GCC channels between DCN subnets.
Before dividing a DCN into subnets, plan an external DCN for connecting to gateway NEs in each subnet.
Ensure that DCN subnet division must not compromise the existing DCN route restoration (protection) capability.
Group separated optical and electrical NEs at the same site in the same DCN subnet.

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