[Iperf-users] client not binding to correct interface

[Andrew M <an...@oc...>]

I have two network interfaces in one host:
em1        192.168.123.1
em2        192.168.234.1

I'm running:

SERVER:
[root@scooby ~]# iperf -fm -p 777 -B192.168.123.1 -s
------------------------------------------------------------
Server listening on TCP port 777
Binding to local address 192.168.123.1
TCP window size: 0.08 MByte (default)
------------------------------------------------------------
[  4] local 192.168.123.1 port 777 connected with 192.168.234.1 port 777
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  24396 MBytes  20444 Mbits/sec
[  5] local 192.168.123.1 port 777 connected with 192.168.234.1 port 777
[  5]  0.0-10.0 sec  20761 MBytes  17410 Mbits/sec

CLIENT:
[root@scooby ~]# iperf -p 777 -B192.168.234.1 -c192.168.123.1
------------------------------------------------------------
Client connecting to 192.168.123.1, TCP port 777
Binding to local address 192.168.234.1
TCP window size:  169 KByte (default)
------------------------------------------------------------
[  3] local 192.168.234.1 port 777 connected with 192.168.123.1 port 777
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  20.3 GBytes  17.4 Gbits/sec

This works even with the cable unplugged so I know it's not using the 
ports.  Some reason why the client isn't initiating the outbound 
connecting on the port it's binding to?

Thanks,
Andrew