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Build failure on platforms without <stdatomic.h> due to use of non-standard u_int64_t

Status: Open.

#2060 In esnet/iperf;

· lgoettgens opened on Jul 13, 2026

iperf 3.21: UDP server with multiple IP aliases may send replies from unexpected addresses

Status: Open.

#2059 In esnet/iperf;

· garrymar opened on Jul 10, 2026

UDP loss figures incorrect and self-inconsistent against pre-3.13 peers (omitted_* substitution)

Status: Open.

#2055 In esnet/iperf;

· therealevanhenry opened on Jul 3, 2026

JSON output (-J) emits two top-level "error" keys on server-relayed errors

Status: Open.

#2051 In esnet/iperf;

· therealevanhenry opened on Jun 24, 2026

Separate UDP GSO and GRO controls for Linux (--gso and --gro options)

Status: Open.

#2037 In esnet/iperf;

· roaoliver opened on May 20, 2026

iperf3 server does not honour the bind command for sending data - sends from incorrect interface

Status: Open.

#2036 In esnet/iperf;

· peterm888 opened on May 20, 2026

Cannot utilize 100gbps on Mellanox ConnectX-5

Status: Open.

#2031 In esnet/iperf;

· antiuser opened on Apr 28, 2026

For udp traffic, if send is ubuntu and receive is windows, -P, --parallel will lead iperf error

Status: Open.

#2026 In esnet/iperf;

· llh8991 opened on Apr 15, 2026

Final interval report always delayed until result exchange

Status: Open.

#2019 In esnet/iperf;

· illarionov opened on Mar 28, 2026

some different between windows and linux

Status: Open.

#1998 In esnet/iperf;

· wangguowang opened on Jan 22, 2026

Handle interrupted tests (server)

Status: Open.

#1997 In esnet/iperf;

· terrancewong opened on Jan 20, 2026

The speed test failed because the address used in the ESt UDP connection was inconsistent.

Status: Open.

#1996 In esnet/iperf;

· Mozartor2 opened on Jan 13, 2026