==== 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      219516512     1754.378  100.00% 
Conn:   1 Mbps:     1754.378 Peak Mbps:     1754.378 Avg Mbps:     1754.378
        2001      283745744     2269.966  100.00% 
Conn:   1 Mbps:     2269.966 Peak Mbps:     2269.966 Avg Mbps:     2269.966
        3003      190546160     1521.327  100.00% 
Conn:   1 Mbps:     1521.327 Peak Mbps:     2269.966 Avg Mbps:     1521.327
        4004      194386272     1555.090  100.00% 
Conn:   1 Mbps:     1555.090 Peak Mbps:     2269.966 Avg Mbps:     1555.090
        5004      187514768     1500.118  100.00% 
Conn:   1 Mbps:     1500.118 Peak Mbps:     2269.966 Avg Mbps:     1500.118
--- fc00:0:0:1::41 tcpbench statistics ---
1287232656 bytes sent over 6.000 seconds
bandwidth min/avg/max/std-dev = 1500.118/1720.176/2269.966/289.364 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
      41     32768         0 
DISABLED