==== 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      198623296     1587.399  100.00% 
Conn:   1 Mbps:     1587.399 Peak Mbps:     1587.399 Avg Mbps:     1587.399
        2001      246922872     1977.360  100.00% 
Conn:   1 Mbps:     1977.360 Peak Mbps:     1977.360 Avg Mbps:     1977.360
        3001      282457280     2259.658  100.00% 
Conn:   1 Mbps:     2259.658 Peak Mbps:     2259.658 Avg Mbps:     2259.658
        4001      186790752     1494.326  100.00% 
Conn:   1 Mbps:     1494.326 Peak Mbps:     2259.658 Avg Mbps:     1494.326
        5001      194223728     1553.790  100.00% 
Conn:   1 Mbps:     1553.790 Peak Mbps:     2259.658 Avg Mbps:     1553.790
--- fc00:0:0:1::41 tcpbench statistics ---
1311066024 bytes sent over 6.000 seconds
bandwidth min/avg/max/std-dev = 1494.326/1774.507/2259.658/296.226 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
      36     32768         0 
DISABLED