# explanantion of pathping output required

Hi

I have the following pathping output and i wanted some explanation of what the data means,
specifically

1) What does it mean when the RTT column shows --- , i.e. hops 7, 8, 9, 11 and 12?
2) What does it mean when Source to Here Lost/Sent=Pct > 0, i.e. hop 1 and 3 but
3) Is the 1% lost between hops 10 and 11 significant?

Computing statistics for 390 seconds...

Hop  RTT    Lost/Sent = Pct  Lost/Sent = Pct  Address

0                                           XXXXXXXXXXXXXXXX[999.999.29.98]

0/ 100 =  0%   |

1    0ms     2/ 100 =  2%     2/ 100 =  2%  XXXXXXXXXXXXXXXXXXX [999.999.151.5]

0/ 100 =  0%   |

2   17ms     0/ 100 =  0%     0/ 100 =  0%  999.999.1.4

0/ 100 =  0%   |

3   22ms     1/ 100 =  1%     1/ 100 =  1%  999.999.171.125

0/ 100 =  0%   |

4   24ms     0/ 100 =  0%     0/ 100 =  0%  999.999.154.126

0/ 100 =  0%   |

5   28ms     0/ 100 =  0%     0/ 100 =  0%  999.99.4.153

0/ 100 =  0%   |

6   33ms     0/ 100 =  0%     0/ 100 =  0%  999.999.4.138

0/ 100 =  0%   |

7  ---     100/ 100 =100%   100/ 100 =100%  999.999.43.49

0/ 100 =  0%   |

8  ---     100/ 100 =100%   100/ 100 =100%  999.999.105.177

0/ 100 =  0%   |

9  ---     100/ 100 =100%   100/ 100 =100%  999.999.105.178

0/ 100 =  0%   |

10   39ms     0/ 100 =  0%     0/ 100 =  0%  r-icr2rzvo-2-68.pdb.sbs.de [999.999.2.70]

1/ 100 =  1%   |

11  ---     100/ 100 =100%    99/ 100 = 99%  999.999.65.214

0/ 100 =  0%   |

12  ---     100/ 100 =100%    99/ 100 = 99%  999.999.1.167

0/ 100 =  0%   |

13   38ms     1/ 100 =  1%     0/ 100 =  0%  XXXXXXXXXXXXXXXXXXX [999.999.12.71]

Trace complete.

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Commented:
1) See jhance's response.
2) This Node/Link Lost/Sent=Pct will tell you the rate that a link between two hops seems to be dropping packets. Don't worry about the Source to Here column, as it doesn't mean too much.
3) 1% loss is generally acceptable.... packets can and do get lost. However, you'll ideally want it to be no higher than 5%. (Obviously 0 is perfect, but this is an imperfect world)
0

Commented:
RTT = Round Trip Time.  The time it takes the ping packet to get to the destination and back.  This is an indication of the latency of the path.

Lost/Sent = ratio of lost to sent packets.  0/100 is perfect.  Out of 100 packets, none were lost.  100/100 is bad but depending on what is at that IP address, it may not respond to pings so the lost packets would be 100%.
0
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