Hey Quinn, Thanks a lot for replying, we did checked by unsetting IP_DONTFRAG flag and still things does not work. Also to give some more context we are using this API (BOOL)writePackets:(NSArray<NSData *> *)packets withProtocols:(NSArray<NSNumber *> *)protocols in NEPacketTunnelFlow to inject packet. Thanks

Hey Quinn , Thanks a lot for replying, we did actually tried unsetting don’t fragment flag but it did not worked well. Still large packets were getting rejected Also to give some more context we are using this API (BOOL)writePackets:(NSArray<NSData *> *)packets withProtocols:(NSArray<NSNumber *> *)protocols in NEPacketTunnelFlow to inject packet. Thanks