Hi,
   From the man page for bridge (4):

     If an IP packet is too large for the outgoing interface, the bridge will
     perform IP fragmentation.  This can happen when bridge members have
     different MTUs or when IP fragments are reassembled by pf.  Non-IP
     packets which are too large for the outgoing interface will be dropped.

Is it somehow possible (maybe with different features?) to fragment a
layer2 frame for reassembly on the other side of a bridge? This would
be for use with MPLS, so using pf's scrub directive would not be
applicable. The desired behavior would be to take in 1500 bytes of IP
payload with an added MPLS label and transport this inside a gif/ipsec
tunnel over the internet (with a wan-link MTU of 1500).

--Doug

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