==== 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      166957488     1334.326  100.00% 
Conn:   1 Mbps:     1334.326 Peak Mbps:     1334.326 Avg Mbps:     1334.326
        2003      184522384     1474.704  100.00% 
Conn:   1 Mbps:     1474.704 Peak Mbps:     1474.704 Avg Mbps:     1474.704
        3004      189678784     1517.430  100.00% 
Conn:   1 Mbps:     1517.430 Peak Mbps:     1517.430 Avg Mbps:     1517.430
        4004      170205480     1361.644  100.00% 
Conn:   1 Mbps:     1361.644 Peak Mbps:     1517.430 Avg Mbps:     1361.644
        5008      197502000     1575.290  100.00% 
Conn:   1 Mbps:     1575.290 Peak Mbps:     1575.290 Avg Mbps:     1575.290
--- fc00:0:0:1::41 tcpbench statistics ---
1105592752 bytes sent over 6.000 seconds
bandwidth min/avg/max/std-dev = 1334.326/1452.679/1575.290/91.658 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
      72     32768         0 
DISABLED