==== 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      200846824     1605.169  100.00% 
Conn:   1 Mbps:     1605.169 Peak Mbps:     1605.169 Avg Mbps:     1605.169
        2001      205923904     1647.391  100.00% 
Conn:   1 Mbps:     1647.391 Peak Mbps:     1647.391 Avg Mbps:     1647.391
        3001      282600520     2260.804  100.00% 
Conn:   1 Mbps:     2260.804 Peak Mbps:     2260.804 Avg Mbps:     2260.804
        4008      212652256     1689.392  100.00% 
Conn:   1 Mbps:     1689.392 Peak Mbps:     2260.804 Avg Mbps:     1689.392
        5004      188398736     1514.764  100.00% 
Conn:   1 Mbps:     1514.764 Peak Mbps:     2260.804 Avg Mbps:     1514.764
--- fc00:0:0:1::41 tcpbench statistics ---
1281887760 bytes sent over 6.004 seconds
bandwidth min/avg/max/std-dev = 1514.764/1743.504/2260.804/265.037 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
      48     32768         0 
DISABLED