==== 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      181167464     1447.892  100.00% 
Conn:   1 Mbps:     1447.892 Peak Mbps:     1447.892 Avg Mbps:     1447.892
        2002      189020376     1510.652  100.00% 
Conn:   1 Mbps:     1510.652 Peak Mbps:     1510.652 Avg Mbps:     1510.652
        3003      191782696     1534.262  100.00% 
Conn:   1 Mbps:     1534.262 Peak Mbps:     1534.262 Avg Mbps:     1534.262
        4003      213464576     1707.717  100.00% 
Conn:   1 Mbps:     1707.717 Peak Mbps:     1707.717 Avg Mbps:     1707.717
        5005      203730344     1628.215  100.00% 
Conn:   1 Mbps:     1628.215 Peak Mbps:     1707.717 Avg Mbps:     1628.215
--- fc00:0:0:1::41 tcpbench statistics ---
1179723664 bytes sent over 6.002 seconds
bandwidth min/avg/max/std-dev = 1447.892/1565.747/1707.717/91.623 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