Warning on receipt of packet from earlier MultiSite version

Different versions of MultiSite have different packet protocols. When multitool with a newer protocol reads a packet with the older protocol, it prints a warning message.

For example:
multitool: Warning: Version mismatch, software:new-protocol, packet:old-protocol
This message does not indicate a problem. It means one of the following things:
  • The feature level of the family is lower than the feature level of the receiving replica.
  • The feature level of the family is the same as the feature level of the sending and receiving replicas. However, when the sending replica created the update packet, it had not yet received a packet containing the information about the new family feature level.