Tracepath not knows the MTU

Issue

• We're trying a tracepath from the host with MTU=9000

• If we do not specify the tracepath length, tracepath outputs:

  [root@guest ~]\# tracepath xxx.yyy.zzz.www  
  1: no reply  
  2: hosta.example.com (192.168.0.1)    8.619ms  
  3: no reply  
  4: no reply  
  5: no reply (util 30 no reply)
  

• In the other hand, if we specify the length with -l 9000 option, we obtain a correct output. we did not see output like "no reply".