==== run-tcpbench6-3-1 ====
rm -f nc.log
nc -6 -v -l -V 41 fc00:0:0:1::41 12345 >/dev/null 2>nc.log &
# Wait until nc is listening.
for  i in `jot 30`; do if fgrep -q Listening nc.log; then break; fi; sleep .1; done
fgrep Listening nc.log
Listening on fc00:0:0:1::41 12345
# Test that path MTU dicovery is working.
tcpbench -6 -t 5 -V 43 -b fc00::43 fc00:0:0:1::41
  elapsed_ms          bytes         mbps   bwidth 
        1001      211677088     1691.725  100.00% 
Conn:   1 Mbps:     1691.725 Peak Mbps:     1691.725 Avg Mbps:     1691.725
        2008      164312440     1305.362  100.00% 
Conn:   1 Mbps:     1305.362 Peak Mbps:     1691.725 Avg Mbps:     1305.362
        3011      182799408     1458.021  100.00% 
Conn:   1 Mbps:     1458.021 Peak Mbps:     1691.725 Avg Mbps:     1458.021
        4012      201228704     1608.221  100.00% 
Conn:   1 Mbps:     1608.221 Peak Mbps:     1691.725 Avg Mbps:     1608.221
        5017      197050456     1570.123  100.00% 
Conn:   1 Mbps:     1570.123 Peak Mbps:     1691.725 Avg Mbps:     1570.123
--- fc00:0:0:1::41 tcpbench statistics ---
1187789096 bytes sent over 6.001 seconds
bandwidth min/avg/max/std-dev = 1305.362/1526.691/1691.725/133.770 Mbps
# path MTU discovery in other rtable does not work in ip6_output()
/sbin/route -T 43 -n get -host -inet6 fc00:0:0:1::41
   route to: fc00:0:0:1::41
destination: fc00::
       mask: ffff:ffff:ffff::
    gateway: ::1
  interface: lo43
 if address: ::1
   priority: 8 (static)
      flags: <UP,GATEWAY,DONE,STATIC>
     use       mtu    expire
      38     32768         0 
DISABLED