RE: Specifying interface for iperf

[Nirav J. <jas...@us...>]

Hi Cris,

You are correctly using the -B option for binding to an interface.

Here is what I used to bind to 4 different interfaces.

[jasapara@emulab-localhost ~]$ ./iperf -s -B 10.1.1.2 -w 64K -p 5001
[jasapara@emulab-localhost ~]$ ./iperf -s -B 10.1.2.2 -w 64K -p 5002
[jasapara@emulab-localhost ~]$ ./iperf -s -B 10.1.3.2 -w 64K -p 5003
[jasapara@emulab-localhost ~]$ ./iperf -s -B 10.1.4.2 -w 64K -p 5004

Which gave me 4 servers listening on 4 different interfaces and 4 different
ports.

Are you sure the IP for the other interface is 224.0.12.34 ? Can you confirm
that ?

- Nirav Jasapara.


-----Original Message-----
From: own...@da...
[mailto:own...@da...] On Behalf Of cn...@ny...
Sent: Thursday, October 21, 2004 6:27 AM
To: ipe...@da...
Subject: Specifying interface for iperf

Running iperf 2.0 on a Linux system with 2 interfaces, I do:

   iperf -s -u -B 224.0.55.55 -i 1 &

and I see:

   Server listening on UDP port 5001
   Binding to local address 224.0.12.34
   Joining multicast group  224.0.12.34
   Receiving 1470 byte datagrams
   UDP buffer size: 64.0 KByte (default)

but I _don't_ see any join message on my network of interest.  I'm guessing
it went out the other interface.  Can I specify the interface to use?  I
don't see any option for that in the docs.

Thanks.

                              Chris