Introduces the principles to follow when planning 1+1 protection for Ethernet veneers.

The limiting principles include, but are not limited to, the following:

1. The access capacity of the protection veneer slot must be greater than or equal to the access capacity of the working veneer slot.
2. The link aggregation group port must be an Ethernet port.
3. Port aggregation has nothing to do with the service, and port aggregation can be configured under various service configurations.
4. When adding a port to an aggregation group, the port needs to be on the same processing board as the master port.
5. When adding a port to an aggregation group, the port must not have a configured service. There is no restriction on the master port.