Impact of MTU on IP packet fragmentation and reassembly
Solution 1:
following wikipedia:
Reassembly is intended to happen in the receiving host but in practice it may be done by an intermediate router, for example, network address translation may need to re-assemble fragments in order to translate data streams, e.g. the FTP control protocol, as described in RFC 2993.
Solution 2:
They will stay at the fragmented size. They'll only be reassembled by the destination host.