Using Flent 1.9.9-git-34ed663 on macOS 10.15.3, I am having trouble with the
"-6" option. My default test host is `flent-fremont.bufferbloat.net`
Using that hostname with the -6 option causes both fping and flent to fail with
unknown host.
What's a good IPv6 host to use with Flent? Thanks.
```
# Without -6 option
bash-3.2$ flent -x -H flent-fremont.bufferbloat.net -t Rich tcp_ndown
--te=download_streams=4
Started Flent 1.9.9-git-34ed663 using Python 3.7.4.
Starting tcp_ndown test. Expected run time: 70 seconds.
... works OK ...
^C
# with -6 option
bash-3.2$ flent -x -H flent-fremont.bufferbloat.net -t Rich tcp_ndown
--te=download_streams=4 -6
Started Flent 1.9.9-git-34ed663 using Python 3.7.4.
Starting tcp_ndown test. Expected run time: 70 seconds.
WARNING: Program exited non-zero.
Runner class: PingRunner
Command: /usr/local/sbin/fping -6 -D -p 200 -c 350 -t 140000
flent-fremont.bufferbloat.net
Return code: 2
Stdout:
Stderr: flent-fremont.bufferbloat.net: nodename nor servname provided, or not
known
WARNING: Command produced no valid data.
Runner class: PingRunner
Command: /usr/local/sbin/fping -6 -D -p 200 -c 350 -t 140000
flent-fremont.bufferbloat.net
Return code: 2
Stdout:
Stderr: flent-fremont.bufferbloat.net: nodename nor servname provided, or not
known
WARNING: Program exited non-zero.
Runner class: NetperfDemoRunner
Command: /usr/local/bin/netperf -P 0 -v 0 -D -0.20 -6 -Y CS0 -H
flent-fremont.bufferbloat.net -p 12865 -t TCP_MAERTS -l 60 -F /dev/urandom -f m
-- -H flent-fremont.bufferbloat.net -k
THROUGHPUT,LOCAL_CONG_CONTROL,REMOTE_CONG_CONTROL,TRANSPORT_MSS,LOCAL_TRANSPORT_RETRANS,REMOTE_TRANSPORT_RETRANS,LOCAL_SOCKET_TOS,REMOTE_SOCKET_TOS,DIRECTION,ELAPSED_TIME,PROTOCOL,LOCAL_SEND_SIZE,LOCAL_RECV_SIZE,REMOTE_SEND_SIZE,REMOTE_RECV_SIZE,LOCAL_BYTES_SENT,LOCAL_BYTES_RECVD,REMOTE_BYTES_SENT,REMOTE_BYTES_RECVD
None
Return code: 255
Stdout: resolve_host: could not resolve host 'flent-fremont.bufferbloat.net'
port '(null)' af AF_INET6
getaddrinfo returned 8 nodename nor servname provided, or not known
Netperf could not resolve flent-fremont.bufferbloat.net as a host name
... etc ...
^C
```
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