RMI not working through Wireless LAN

I'm customizing an application which heavily uses RMI. This works fine wired, but when the user connects from a laptop through certain wireless LAN cards, objects sent via RMI never arrived. Our network sniffer revealed that packets apparently used for RMI up to 17K in size are failing. According to our networking guy, the IEEE says packets should be under 9K. Is the packet size used by RMI configurable? Is it really violating an IEEE standard?
Thanks.

At the risk of wading into an area with limited knowledge, I'd say that RMI is not the place to look. The problem sounds like it is in your TCP/IP stack somewhere, because that's where packet sizes are supposed to be negotiated. (With a sniffer you typically look at transmitted packets, not application blocks; the TCP/IP sender is supposed to packetize as appropriate, and the TCP/IP receiver is supposed to reassemble.)

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