start-iperf3 can fail to start on device if it has multiple IP addresses

The start-iperf3 script can fail to start iperf3 on a device if that device has multiple IP addresses. For instance:

$ ip addr show dev ens4f0
2: ens4f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 84:16:0c:ae:28:3a brd ff:ff:ff:ff:ff:ff
    altname enp23s0f0
    inet 10.1.11.121/23 brd 10.1.11.255 scope global ens4f0
       valid_lft forever preferred_lft forever
    inet 10.245.130.75/21 brd 10.245.135.255 scope global ens4f0
       valid_lft forever preferred_lft forever
    inet6 fe80::8616:cff:feae:283a/64 scope link
       valid_lft forever preferred_lft forever
$ ./start-iperf3 -a 10.1.11.121 -n 1
NUMA node of ens4f0 is 0....
Will use CPU cores: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47]....
Launching: iperf3 -sD -B 10.1.11.121 -p 5201 -A0
$ ./start-iperf3 -a 10.245.130.75 -n 1
Could not find a network device associated with 10.245.130.75!

Although the device has IP addresses 10.1.11.121 and 10.245.130.75, start-iperf3 can launch iperf3 on the former address only, not on the latter address.