"Tomer Peleg" wrote:
> Hello,
> We have developed a communication system which is composed of two parts:
> Application layer, and Data link layer.
> The two layers are developed as two different systems. The application layer
> is developed using a standard PC, running a Win2K or Win XP operating systems.
> The data link supports UDP-IP as the communication protocol. Due to the size
> of the messages, and the time it takes the data link to transfer the
> messages, it takes a single message more than 60 seconds from the time the
> first IP packet is been received to the last IP packet (The entire UDP
> message).
> Due to the Reassembly time out limitation of the operating system in the
> receiving station, the application layer does not receive the message.
> We have changed the IpReassemblyTimeout in the registry (under
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters) to be
> 180 seconds (D4 hex value).
> We found out that despite the change we made, the actual Reassembly time out
> is limited to around 120 seconds (trial and error).
> We would like to know the following:
> 1. Is there a Reassembly time out maximum value ? What is the limitation?
> 2. Is there a way to overcome this limitation?
> 3. Are there any other parameters that are relevant to the reassembly
> mechanism?
> Thank you for your help,
> Tomer Peleg,
> Senior communication system engineer
> Elbit Systems limited
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