OK, that was a search-and-replace error in the original quote. This is
still something with your layer 3/4 load balancing.
iperf2 does not support setting the source port, but iperf3 does - that
might be worth a try.
-- jacob
On 06/21/2018 03:37 PM, mj wrote:
Hi Jacob,
Thanks for your reply. But I'm not sure I completely understand it. :-)
On 06/21/2018 09:09 PM, Jacob DeGlopper wrote:
In your example, where you see one link being used, I see an even
source IP paired with an odd destination port number for both
transfers, or is that a search and replace issue?
Well, I left portnumbers as they were, I edited the IPs. Actually the
machines are not a.b.c.9 and a.b.c.10, but a.b.c.204 and a.b.c.205,
for the rest, everyting is unedited.
So a single line example:
Client connecting to a.b.c.205, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local a.b.c.204 port 60600 connected with a.b.c.205 port 5001
------------------------------------------------------------
Client connecting to a.b.c.205, TCP port 5000
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local a.b.c.204 port 53788 connected with a.b.c.205 port 5000
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 746 MBytes 625 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 383 MBytes 321 Mbits/sec
And a lucky example:
Client connecting to a.b.c.205, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local a.b.c.204 port 37984 connected with a.b.c.205 port 5001
------------------------------------------------------------
Client connecting to a.b.c.205, TCP port 5000
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local a.b.c.204 port 48850 connected with a.b.c.205 port 5000
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 1.09 GBytes 936 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 885 MBytes 742 Mbits/sec
(reason for the a.b.c.204 is that the IPs are public, and I'd rather
not put them here)
I don't see the odd/even port numbers thing you noticed..? (I could
very well miss something though....)
I see no way to specify what outgoing port iperf should use, otherwise
I could try again using the same ports, to check the pattern.
Thanks again!
MJ
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