UDP packet error


Hello all,
 
I am having some issues running my iperf tests across a network, when ever I run the test I get the following;
 
"1952] WARNING: did not receive ack of last datagram after 10 tries.
[1952] Sent 246889 datagrams"
 
Now ive looked through google and there is a number of other users who have also seen this fault but I can find nothing that clearly explains whats happening.

Now im running from a freebsd based unit running the client 1.7.0 using the syntax
 "iperf -c 10.10.10.10 -i 5 -t 60 -b 95M", on the server end im running the syntax "iperf -s -u".
 
The network is traversing several diffirent IP ranges and a firewall device.

When running the TCP test I find no issues and get roughly 95 mega bites per second.
 
Any help would be appriciated.

Lee


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