==== 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 
        1008      184137304     1461.407  100.00% 
Conn:   1 Mbps:     1461.407 Peak Mbps:     1461.407 Avg Mbps:     1461.407
        2007      174930032     1400.841  100.00% 
Conn:   1 Mbps:     1400.841 Peak Mbps:     1461.407 Avg Mbps:     1400.841
        3009      192597272     1539.239  100.00% 
Conn:   1 Mbps:     1539.239 Peak Mbps:     1539.239 Avg Mbps:     1539.239
        4009      211268440     1691.839  100.00% 
Conn:   1 Mbps:     1691.839 Peak Mbps:     1691.839 Avg Mbps:     1691.839
        5009      206751384     1654.011  100.00% 
Conn:   1 Mbps:     1654.011 Peak Mbps:     1691.839 Avg Mbps:     1654.011
--- fc00:0:0:1::41 tcpbench statistics ---
1165332968 bytes sent over 6.000 seconds
bandwidth min/avg/max/std-dev = 1400.841/1549.468/1691.839/110.588 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
      58     32768         0 
DISABLED