==== 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      203833320     1630.667  100.00% 
Conn:   1 Mbps:     1630.667 Peak Mbps:     1630.667 Avg Mbps:     1630.667
        2002      241224712     1927.870  100.00% 
Conn:   1 Mbps:     1927.870 Peak Mbps:     1927.870 Avg Mbps:     1927.870
        3002      297793904     2382.351  100.00% 
Conn:   1 Mbps:     2382.351 Peak Mbps:     2382.351 Avg Mbps:     2382.351
        4004      205354312     1641.193  100.00% 
Conn:   1 Mbps:     1641.193 Peak Mbps:     2382.351 Avg Mbps:     1641.193
        5012      205145712     1629.757  100.00% 
Conn:   1 Mbps:     1629.757 Peak Mbps:     2382.351 Avg Mbps:     1629.757
--- fc00:0:0:1::41 tcpbench statistics ---
1358583600 bytes sent over 5.999 seconds
bandwidth min/avg/max/std-dev = 1629.757/1842.368/2382.351/293.048 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
      51     32768         0 
DISABLED