Network issues. Packet loss when spray is used!!!!!!!!!!!!!!!

Hi, I am not in a position to figure out, is it an issue with my server or my network. I run spray and find packet loss...what should I suspect?

In one way, the packet loss is 0%, while the other way, there is 90% loss. Both machines are located in two different buildings.

here is the output.

bash-2.03# spray 172.16.59.7

sending 1162 packets of length 86 to 172.16.59.7 ...

no packets dropped by 172.16.59.7

34031 packets/sec, 2926694 bytes/sec

bash-2.03# spray 172.16.59.7

sending 1162 packets of length 86 to 172.16.59.7 ...

no packets dropped by 172.16.59.7

33512 packets/sec, 2882044 bytes/sec

bash-2.03# spray 172.16.59.238

sending 1162 packets of length 86 to 172.16.59.238 ...

205 packets (17.642%) dropped by 172.16.59.238

28146 packets/sec, 2420575 bytes/sec

bash-2.05$ spray giove

sending 1162 packets of length 86 to giove ...

1052 packets (90.534%) dropped by giove

7 packets/sec, 629 bytes/sec

bash-2.05$ spray giove

sending 1162 packets of length 86 to giove ...

1052 packets (90.534%) dropped by giove

7 packets/sec, 629 bytes/sec

bash-2.05$ spray giove

sending 1162 packets of length 86 to giove ...

1052 packets (90.534%) dropped by giove

7 packets/sec, 629 bytes/sec

bash-2.05$ spray giove

sending 1162 packets of length 86 to giove ...

1052 packets (90.534%) dropped by giove

7 packets/sec, 630 bytes/sec

bash-2.05$ spray giove

sending 1162 packets of length 86 to giove ...

1052 packets (90.534%) dropped by giove

7 packets/sec, 630 bytes/sec

bash-2.05$ spray giove

sending 1162 packets of length 86 to giove ...

1052 packets (90.534%) dropped by giove

7 packets/sec, 630 bytes/sec

[1845 byte] By [guddlua] at [2007-11-26 17:35:08]
# 1

http://docs.sun.com/app/docs/doc/816-5166/6mbb1kqhl?a=view

spray is not useful as a networking benchmark, as it uses unreliable connectionless transports, UDP for example. spray can report a large number of packets dropped when the drops were caused by spray sending packets faster than they can be buffered locally, that is, before the packets get to the network medium.

alan.paea at 2007-7-9 0:03:09 > top of Java-index,General,Network Configurations...
# 2

Look for speed duplex mismatches with "netstat -i".

If you see any errors or collisions on a switched 100MB network then you have a problem, either a speed duplex mismatch or some kind of physical problem.

Although it is rare for autonegotiation to fail, it does happen occasionally, particularly with Sun hme interfaces and old equipment.

wsandersa at 2007-7-9 0:03:09 > top of Java-index,General,Network Configurations...