==== 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 
        1002      212914736     1699.918  100.00% 
Conn:   1 Mbps:     1699.918 Peak Mbps:     1699.918 Avg Mbps:     1699.918
        2004      216321464     1727.117  100.00% 
Conn:   1 Mbps:     1727.117 Peak Mbps:     1727.117 Avg Mbps:     1727.117
        3004      297811760     2384.879  100.00% 
Conn:   1 Mbps:     2384.879 Peak Mbps:     2384.879 Avg Mbps:     2384.879
        4005      228935688     1831.486  100.00% 
Conn:   1 Mbps:     1831.486 Peak Mbps:     2384.879 Avg Mbps:     1831.486
        5005      188510664     1508.085  100.00% 
Conn:   1 Mbps:     1508.085 Peak Mbps:     2384.879 Avg Mbps:     1508.085
--- fc00:0:0:1::41 tcpbench statistics ---
1345785688 bytes sent over 6.000 seconds
bandwidth min/avg/max/std-dev = 1508.085/1830.297/2384.879/296.320 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
      59     32768         0 
DISABLED