Hi Bruce,
We used the *%* for both tx and and rx device binding in iperf 2. Just
something to consider for consistency between the two tools.
*To affect the physical output interface (e.g. dual homed systems) either
use -c % (requires root) which bypasses this host route table
lookup, or configure policy routing per each -B source address and set the
output interface appropriately in the policy routes. On the server or
receive, only packets destined to -B IP address will be received. It's also
useful for multicast. For example, iperf -s -B 224.0.0.1%eth0 will only
accept ip multicast packets with dest ip 224.0.0.1 that are received on the
eth0 interface, while iperf -s -B 224.0.0.1 will receive those packets on
any interface, Finally, the device specifier is required for v6 link-local,
e.g. -c [v6addr]% -V, to select the output interface.*
Bob
On Tue, Jun 1, 2021 at 11:07 AM Bruce A. Mah wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA512
>
> ESnet (Energy Sciences Network) is proud to announce the availability
> of iperf 3.10. This release is primarily a bugfix release. A few new
> features, controlled by various new command-line flags, have been
> added (--time-skew-threshold, --bind-dev, --rcv-timeout,
> - --dont-fragment). More information can be found in the iperf-3.10
> release notes, which are contained in the RELNOTES.md file in the
> distribution.
>
> iperf 3.10 should be fully backward-compatible with prior iperf3
> releases, that is, iperf 3.10 clients and servers should interoperate
> correctly with all 3.x clients and servers.
>
> iperf3 is a tool for measuring the maximum TCP, UDP, and SCTP
> throughput along a path, allowing for the tuning of various parameters
> and reporting measurements such as throughput, jitter, and datagram
> packet loss. It is fully supported on Linux, FreeBSD, and macOS. It
> may run on other platforms as well, although it has not received the
> same attention and testing. Note that iperf3 is not compatible with,
> and will not interoperate with, version 2 or earlier of iperf,
> although the two versions can co-exist on the same hosts and networks.
>
> The source code for iperf 3.10 is available at:
>
> https://downloads.es.net/pub/iperf/iperf-3.10.tar.gz
>
> SHA256 hash:
>
> 4390982928542256c17d6dd1f56eede9092649ebfd8a97c8cecfad12d238ad57
>
> iperf3 is freely-redistributable under a 3-clause BSD license. More
> information can be found in the LICENSE file inside the source
> distribution.
>
> Additional documentation for iperf3 can be found at:
>
> https://software.es.net/iperf
>
> More information about iperf3 (including the issue tracker, source
> code repository access, and mailing list) can be found on the iperf3
> page on GitHub at:
>
> https://github.com/esnet/iperf
>
> User questions can go to the iperf users list (which is more-or-less
> shared between iperf2 and iperf3):
>
> iperf-users@lists.sourceforge.net
>
> Mailing list information and archives can be found at:
>
> https://lists.sourceforge.net/lists/listinfo/iperf-users
>
> The mailing list for iperf3 development is:
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> iperf-...@googlegroups.com
>
> To see the list archives or join the mailing list, visit:
>
> http://groups.google.com/group/iperf-dev
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