==== 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 
        1000      182443376     1459.547  100.00% 
Conn:   1 Mbps:     1459.547 Peak Mbps:     1459.547 Avg Mbps:     1459.547
        2001      201787416     1614.299  100.00% 
Conn:   1 Mbps:     1614.299 Peak Mbps:     1614.299 Avg Mbps:     1614.299
        3001      221711776     1773.694  100.00% 
Conn:   1 Mbps:     1773.694 Peak Mbps:     1773.694 Avg Mbps:     1773.694
        4002      222707400     1779.879  100.00% 
Conn:   1 Mbps:     1779.879 Peak Mbps:     1779.879 Avg Mbps:     1779.879
        5001      289001440     2314.326  100.00% 
Conn:   1 Mbps:     2314.326 Peak Mbps:     2314.326 Avg Mbps:     2314.326
--- fc00:0:0:1::41 tcpbench statistics ---
1361150936 bytes sent over 6.003 seconds
bandwidth min/avg/max/std-dev = 1459.547/1788.349/2314.326/288.216 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