==== 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      262212888     2097.703  100.00% 
Conn:   1 Mbps:     2097.703 Peak Mbps:     2097.703 Avg Mbps:     2097.703
        2000      200175200     1601.402  100.00% 
Conn:   1 Mbps:     1601.402 Peak Mbps:     2097.703 Avg Mbps:     1601.402
        3001      224250040     1794.000  100.00% 
Conn:   1 Mbps:     1794.000 Peak Mbps:     2097.703 Avg Mbps:     1794.000
        4001      224968312     1801.548  100.00% 
Conn:   1 Mbps:     1801.548 Peak Mbps:     2097.703 Avg Mbps:     1801.548
        5001      234419520     1877.233  100.00% 
Conn:   1 Mbps:     1877.233 Peak Mbps:     2097.703 Avg Mbps:     1877.233
--- fc00:0:0:1::41 tcpbench statistics ---
1414480960 bytes sent over 6.000 seconds
bandwidth min/avg/max/std-dev = 1601.402/1834.377/2097.703/160.102 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
      66     32768         0 
DISABLED