pathping output questions

  • Thread starter Thread starter djc
  • Start date Start date
D

djc

below is output of a pathping -n command. I have changed the actual IP
information. I have 3 major questions:
1) here is the header for the stats info:

Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address

what does this mean exactly? 'source to here' and 'this node/link'? I don't
understand? why are there 2 sections for packet loss for each hop?

2) look at hop 10 below in the stats section. How can there be 100% packet
loss and still get through to the target host?

3) is it normal for the RTT to get longer as you get farther along the path?

Tracing route to targethost.domain.com [226.128.52.8]
over a maximum of 30 hops:

0 219.188.229.92
1 10.10.0.1
2 219.188.229.2
3 219.188.233.2
4 65.221.176.115
5 68.18.75.155
6 218.52.7.35
7 139.240.4.27
8 139.240.5.62
9 139.240.29.24
10 219.178.95.244
11 226.178.47.4
12 226.128.52.8

Computing statistics for 300 seconds...

Source to Here This Node/Link

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

0 219.188.229.92

0/ 100 = 0% |

1 0ms 0/ 100 = 0% 0/ 100 = 0% 10.10.0.1

0/ 100 = 0% |

2 15ms 0/ 100 = 0% 0/ 100 = 0% 219.188.229.2

0/ 100 = 0% |

3 20ms 2/ 100 = 2% 2/ 100 = 2% 219.188.233.2

0/ 100 = 0% |

4 19ms 0/ 100 = 0% 0/ 100 = 0% 65.221.176.115

0/ 100 = 0% |

5 29ms 0/ 100 = 0% 0/ 100 = 0% 68.18.75.155

0/ 100 = 0% |

6 23ms 0/ 100 = 0% 0/ 100 = 0% 218.52.7.35

0/ 100 = 0% |

7 26ms 0/ 100 = 0% 0/ 100 = 0% 139.240.4.27

0/ 100 = 0% |

8 108ms 1/ 100 = 1% 1/ 100 = 1% 139.240.5.62

0/ 100 = 0% |

9 118ms 0/ 100 = 0% 0/ 100 = 0% 139.240.29.24

0/ 100 = 0% |

10 --- 100/ 100 =100% 100/ 100 =100% 219.178.95.244

0/ 100 = 0% |

11 113ms 1/ 100 = 1% 1/ 100 = 1% 226.178.47.4

0/ 100 = 0% |

12 118ms 0/ 100 = 0% 0/ 100 = 0% 226.128.52.8

Trace complete.
 
There are 2 columns that you see - 1) Source to Here - Lost/Sent = %
2) This Node/Link
Lost/Sent = %

Consider the hops: A->B->C->D from A->D
Source to Here - refers to the statistics for packets sent from source to
the intermediate node. In the above, this will be the statistics for
A->B,A->C,A->D.

This Node/Link - refers to the intermediate hop being the source. For
statistics ending with the | symbol, this represents the loss at the link
whereas for the statistics ending with the IP address, this refers to the
packet loss at the node.
So in this case, it will be for A->B, B->C,C->D considering both the link as
well as the node.

As far as there being a 100% packet loss, I'm not sure but it could be that
the route at 139.240.29.24 might have got updated to use an alternate route
since 219.178.95.244 node is dropping. It could also be due to some
firewall?
3) is it normal for the RTT to get longer as you get farther along the
Click to expand...
path?
Since the RTT for node n, is cummulative time to reach n-1 and the time
taken to reach n from n-1, i would expect the RTT to increase progressively.

--
Kadir

(e-mail address removed) [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

djc said:
below is output of a pathping -n command. I have changed the actual IP
information. I have 3 major questions:
1) here is the header for the stats info:

Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address

what does this mean exactly? 'source to here' and 'this node/link'? I don't
understand? why are there 2 sections for packet loss for each hop?

2) look at hop 10 below in the stats section. How can there be 100% packet
loss and still get through to the target host?

3) is it normal for the RTT to get longer as you get farther along the path?

Tracing route to targethost.domain.com [226.128.52.8]
over a maximum of 30 hops:

0 219.188.229.92
1 10.10.0.1
2 219.188.229.2
3 219.188.233.2
4 65.221.176.115
5 68.18.75.155
6 218.52.7.35
7 139.240.4.27
8 139.240.5.62
9 139.240.29.24
10 219.178.95.244
11 226.178.47.4
12 226.128.52.8

Computing statistics for 300 seconds...

Source to Here This Node/Link

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

0 219.188.229.92

0/ 100 = 0% |

1 0ms 0/ 100 = 0% 0/ 100 = 0% 10.10.0.1

0/ 100 = 0% |

2 15ms 0/ 100 = 0% 0/ 100 = 0% 219.188.229.2

0/ 100 = 0% |

3 20ms 2/ 100 = 2% 2/ 100 = 2% 219.188.233.2

0/ 100 = 0% |

4 19ms 0/ 100 = 0% 0/ 100 = 0% 65.221.176.115

0/ 100 = 0% |

5 29ms 0/ 100 = 0% 0/ 100 = 0% 68.18.75.155

0/ 100 = 0% |

6 23ms 0/ 100 = 0% 0/ 100 = 0% 218.52.7.35

0/ 100 = 0% |

7 26ms 0/ 100 = 0% 0/ 100 = 0% 139.240.4.27

0/ 100 = 0% |

8 108ms 1/ 100 = 1% 1/ 100 = 1% 139.240.5.62

0/ 100 = 0% |

9 118ms 0/ 100 = 0% 0/ 100 = 0% 139.240.29.24

0/ 100 = 0% |

10 --- 100/ 100 =100% 100/ 100 =100% 219.178.95.244

0/ 100 = 0% |

11 113ms 1/ 100 = 1% 1/ 100 = 1% 226.178.47.4

0/ 100 = 0% |

12 118ms 0/ 100 = 0% 0/ 100 = 0% 226.128.52.8

Trace complete.
Click to expand...
 
thank you Kadirvel.

1) I am a little unclear on the 'This Node/Link' part though. (A->B, B->C,
C->D). I am having trouble visualizing this part. Lets just take B->C for
an example.

"This Node/Link - refers to the intermediate hop being the source. For
statistics ending with the | symbol, this represents the loss at the link
whereas for the statistics ending with the IP address, this refers to the
packet loss at the node. So in this case, it will be for A->B, B->C,C->D
considering both the link as well as the node."
-a) in B->C, which, or what is the 'link'
-b) in B->C, which is the 'node'

What exactly is the 'link', when you refer to 'the loss at the link' above,
the ones that end in '|'? I am having trouble seeing what exactly the 2
distinct parts of this measurement are? or I guess 'where' they are coming
from is the more appropriate question? In B->C, B is an intermediate hop,
and the 'source' in this case. And C is the destination. How does this map
to your explanation above? I guess I don't understand how they are splitting
up the 'link' and the 'node'. When I think of communication between B and C
(B->C) I think of B as a router, the source node, C as the destination node,
and -> as a physical line of some kind, or maybe a wireless link. If there
is a problem communicating from B to C are you saying that pathping is
telling you what problems occured from the 'line' itself, and what problems
occurred from the destination node, C, itself? how could it make that
distinction? If the packet got through the line is ok, and in order for it
to know that the packet got through, the destination node must have replied,
so it must be ok?

2) for 'Source to Here - Lost/Sent=%' (A->B, A->C, A->D) etc... if there was
packet loss at say B, then that packet loss would probably be included (or
repeated) in statistics for C and D since B is causing packet loss and the
packet from A->C and A->D has to travel through B to get there? right? Or do
the statistics ONLY include statistics from source and destination...
meaning in the case of A->D, any packet loss in between caused from B or C
would NOT be included in the statistics?

3) what doess RTT stand for?

I've almost got it! Thank you for your time. And thanks for your patience!
djc


Kadirvel C Vanniarajan said:
There are 2 columns that you see - 1) Source to Here - Lost/Sent = %
2) This Node/Link
Lost/Sent = %

Consider the hops: A->B->C->D from A->D
Source to Here - refers to the statistics for packets sent from source to
the intermediate node. In the above, this will be the statistics for
A->B,A->C,A->D.

This Node/Link - refers to the intermediate hop being the source. For
statistics ending with the | symbol, this represents the loss at the link
whereas for the statistics ending with the IP address, this refers to the
packet loss at the node.
So in this case, it will be for A->B, B->C,C->D considering both the link as
well as the node.

As far as there being a 100% packet loss, I'm not sure but it could be that
the route at 139.240.29.24 might have got updated to use an alternate route
since 219.178.95.244 node is dropping. It could also be due to some
firewall?
3) is it normal for the RTT to get longer as you get farther along the
Click to expand...
path?
Since the RTT for node n, is cummulative time to reach n-1 and the time
taken to reach n from n-1, i would expect the RTT to increase progressively.

--
Kadir

(e-mail address removed) [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

djc said:
below is output of a pathping -n command. I have changed the actual IP
information. I have 3 major questions:
1) here is the header for the stats info:

Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address

what does this mean exactly? 'source to here' and 'this node/link'? I don't
understand? why are there 2 sections for packet loss for each hop?

2) look at hop 10 below in the stats section. How can there be 100% packet
loss and still get through to the target host?

3) is it normal for the RTT to get longer as you get farther along the path?

Tracing route to targethost.domain.com [226.128.52.8]
over a maximum of 30 hops:

0 219.188.229.92
1 10.10.0.1
2 219.188.229.2
3 219.188.233.2
4 65.221.176.115
5 68.18.75.155
6 218.52.7.35
7 139.240.4.27
8 139.240.5.62
9 139.240.29.24
10 219.178.95.244
11 226.178.47.4
12 226.128.52.8

Computing statistics for 300 seconds...

Source to Here This Node/Link

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

0 219.188.229.92

0/ 100 = 0% |

1 0ms 0/ 100 = 0% 0/ 100 = 0% 10.10.0.1

0/ 100 = 0% |

2 15ms 0/ 100 = 0% 0/ 100 = 0% 219.188.229.2

0/ 100 = 0% |

3 20ms 2/ 100 = 2% 2/ 100 = 2% 219.188.233.2

0/ 100 = 0% |

4 19ms 0/ 100 = 0% 0/ 100 = 0% 65.221.176.115

0/ 100 = 0% |

5 29ms 0/ 100 = 0% 0/ 100 = 0% 68.18.75.155

0/ 100 = 0% |

6 23ms 0/ 100 = 0% 0/ 100 = 0% 218.52.7.35

0/ 100 = 0% |

7 26ms 0/ 100 = 0% 0/ 100 = 0% 139.240.4.27

0/ 100 = 0% |

8 108ms 1/ 100 = 1% 1/ 100 = 1% 139.240.5.62

0/ 100 = 0% |

9 118ms 0/ 100 = 0% 0/ 100 = 0% 139.240.29.24

0/ 100 = 0% |

10 --- 100/ 100 =100% 100/ 100 =100% 219.178.95.244

0/ 100 = 0% |

11 113ms 1/ 100 = 1% 1/ 100 = 1% 226.178.47.4

0/ 100 = 0% |

12 118ms 0/ 100 = 0% 0/ 100 = 0% 226.128.52.8

Trace complete.
Click to expand...
Click to expand...
 
I came across this link which explains the pathping command crisply. I hope
this addresses all your questions. If not, do let me know.
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/pathping.mspx

--
Kadir

(e-mail address removed) [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

djc said:
thank you Kadirvel.

1) I am a little unclear on the 'This Node/Link' part though. (A->B, B->C,
C->D). I am having trouble visualizing this part. Lets just take B->C for
an example.

"This Node/Link - refers to the intermediate hop being the source. For
statistics ending with the | symbol, this represents the loss at the link
whereas for the statistics ending with the IP address, this refers to the
packet loss at the node. So in this case, it will be for A->B, B->C,C->D
considering both the link as well as the node."
-a) in B->C, which, or what is the 'link'
-b) in B->C, which is the 'node'

What exactly is the 'link', when you refer to 'the loss at the link' above,
the ones that end in '|'? I am having trouble seeing what exactly the 2
distinct parts of this measurement are? or I guess 'where' they are coming
from is the more appropriate question? In B->C, B is an intermediate hop,
and the 'source' in this case. And C is the destination. How does this map
to your explanation above? I guess I don't understand how they are splitting
up the 'link' and the 'node'. When I think of communication between B and C
(B->C) I think of B as a router, the source node, C as the destination node,
and -> as a physical line of some kind, or maybe a wireless link. If there
is a problem communicating from B to C are you saying that pathping is
telling you what problems occured from the 'line' itself, and what problems
occurred from the destination node, C, itself? how could it make that
distinction? If the packet got through the line is ok, and in order for it
to know that the packet got through, the destination node must have replied,
so it must be ok?

2) for 'Source to Here - Lost/Sent=%' (A->B, A->C, A->D) etc... if there was
packet loss at say B, then that packet loss would probably be included (or
repeated) in statistics for C and D since B is causing packet loss and the
packet from A->C and A->D has to travel through B to get there? right? Or do
the statistics ONLY include statistics from source and destination...
meaning in the case of A->D, any packet loss in between caused from B or C
would NOT be included in the statistics?

3) what doess RTT stand for?

I've almost got it! Thank you for your time. And thanks for your patience!
djc


Kadirvel C Vanniarajan said:
There are 2 columns that you see - 1) Source to Here - Lost/Sent = %
2) This Node/Link
Lost/Sent = %

Consider the hops: A->B->C->D from A->D
Source to Here - refers to the statistics for packets sent from source to
the intermediate node. In the above, this will be the statistics for
A->B,A->C,A->D.

This Node/Link - refers to the intermediate hop being the source. For
statistics ending with the | symbol, this represents the loss at the link
whereas for the statistics ending with the IP address, this refers to the
packet loss at the node.
So in this case, it will be for A->B, B->C,C->D considering both the
Click to expand...
link
as
well as the node.

As far as there being a 100% packet loss, I'm not sure but it could be that
the route at 139.240.29.24 might have got updated to use an alternate route
since 219.178.95.244 node is dropping. It could also be due to some
firewall?
3) is it normal for the RTT to get longer as you get farther along the
Click to expand...
path?
Since the RTT for node n, is cummulative time to reach n-1 and the time
taken to reach n from n-1, i would expect the RTT to increase progressively.

--
Kadir

(e-mail address removed) [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

djc said:
below is output of a pathping -n command. I have changed the actual IP
information. I have 3 major questions:
1) here is the header for the stats info:

Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address

what does this mean exactly? 'source to here' and 'this node/link'? I don't
understand? why are there 2 sections for packet loss for each hop?

2) look at hop 10 below in the stats section. How can there be 100% packet
loss and still get through to the target host?

3) is it normal for the RTT to get longer as you get farther along the path?

Tracing route to targethost.domain.com [226.128.52.8]
over a maximum of 30 hops:

0 219.188.229.92
1 10.10.0.1
2 219.188.229.2
3 219.188.233.2
4 65.221.176.115
5 68.18.75.155
6 218.52.7.35
7 139.240.4.27
8 139.240.5.62
9 139.240.29.24
10 219.178.95.244
11 226.178.47.4
12 226.128.52.8

Computing statistics for 300 seconds...

Source to Here This Node/Link

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

0 219.188.229.92

0/ 100 = 0% |

1 0ms 0/ 100 = 0% 0/ 100 = 0% 10.10.0.1

0/ 100 = 0% |

2 15ms 0/ 100 = 0% 0/ 100 = 0% 219.188.229.2

0/ 100 = 0% |

3 20ms 2/ 100 = 2% 2/ 100 = 2% 219.188.233.2

0/ 100 = 0% |

4 19ms 0/ 100 = 0% 0/ 100 = 0% 65.221.176.115

0/ 100 = 0% |

5 29ms 0/ 100 = 0% 0/ 100 = 0% 68.18.75.155

0/ 100 = 0% |

6 23ms 0/ 100 = 0% 0/ 100 = 0% 218.52.7.35

0/ 100 = 0% |

7 26ms 0/ 100 = 0% 0/ 100 = 0% 139.240.4.27

0/ 100 = 0% |

8 108ms 1/ 100 = 1% 1/ 100 = 1% 139.240.5.62

0/ 100 = 0% |

9 118ms 0/ 100 = 0% 0/ 100 = 0% 139.240.29.24

0/ 100 = 0% |

10 --- 100/ 100 =100% 100/ 100 =100% 219.178.95.244

0/ 100 = 0% |

11 113ms 1/ 100 = 1% 1/ 100 = 1% 226.178.47.4

0/ 100 = 0% |

12 118ms 0/ 100 = 0% 0/ 100 = 0% 226.128.52.8

Trace complete.
Click to expand...
Click to expand...
Click to expand...
 
ok. I'll check it out. Thanks for your help.
-djc

Kadirvel C Vanniarajan said:
I came across this link which explains the pathping command crisply. I hope
this addresses all your questions. If not, do let me know.
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/pathping.mspx

--
Kadir

(e-mail address removed) [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

djc said:
thank you Kadirvel.

1) I am a little unclear on the 'This Node/Link' part though. (A->B, B->C,
C->D). I am having trouble visualizing this part. Lets just take B->C for
an example.

"This Node/Link - refers to the intermediate hop being the source. For
statistics ending with the | symbol, this represents the loss at the link
whereas for the statistics ending with the IP address, this refers to the
packet loss at the node. So in this case, it will be for A->B, B->C,C->D
considering both the link as well as the node."
-a) in B->C, which, or what is the 'link'
-b) in B->C, which is the 'node'

What exactly is the 'link', when you refer to 'the loss at the link' above,
the ones that end in '|'? I am having trouble seeing what exactly the 2
distinct parts of this measurement are? or I guess 'where' they are coming
from is the more appropriate question? In B->C, B is an intermediate hop,
and the 'source' in this case. And C is the destination. How does this map
to your explanation above? I guess I don't understand how they are splitting
up the 'link' and the 'node'. When I think of communication between B
Click to expand...
and
C
(B->C) I think of B as a router, the source node, C as the destination node,
and -> as a physical line of some kind, or maybe a wireless link. If there
is a problem communicating from B to C are you saying that pathping is
telling you what problems occured from the 'line' itself, and what problems
occurred from the destination node, C, itself? how could it make that
distinction? If the packet got through the line is ok, and in order for it
to know that the packet got through, the destination node must have replied,
so it must be ok?

2) for 'Source to Here - Lost/Sent=%' (A->B, A->C, A->D) etc... if there was
packet loss at say B, then that packet loss would probably be included (or
repeated) in statistics for C and D since B is causing packet loss and the
packet from A->C and A->D has to travel through B to get there? right?
Click to expand...
Or
do
the statistics ONLY include statistics from source and destination...
meaning in the case of A->D, any packet loss in between caused from B or C
would NOT be included in the statistics?

3) what doess RTT stand for?

I've almost got it! Thank you for your time. And thanks for your patience!
djc


Kadirvel C Vanniarajan said:
There are 2 columns that you see - 1) Source to Here - Lost/Sent = %
2) This Node/Link
Lost/Sent = %

Consider the hops: A->B->C->D from A->D
Source to Here - refers to the statistics for packets sent from source to
the intermediate node. In the above, this will be the statistics for
A->B,A->C,A->D.

This Node/Link - refers to the intermediate hop being the source. For
statistics ending with the | symbol, this represents the loss at the link
whereas for the statistics ending with the IP address, this refers to the
packet loss at the node.
So in this case, it will be for A->B, B->C,C->D considering both the
Click to expand...
link
as
well as the node.

As far as there being a 100% packet loss, I'm not sure but it could be that
the route at 139.240.29.24 might have got updated to use an alternate route
since 219.178.95.244 node is dropping. It could also be due to some
firewall?

3) is it normal for the RTT to get longer as you get farther along the
path?
Since the RTT for node n, is cummulative time to reach n-1 and the time
taken to reach n from n-1, i would expect the RTT to increase progressively.

--
Kadir

(e-mail address removed) [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

below is output of a pathping -n command. I have changed the actual IP
information. I have 3 major questions:
1) here is the header for the stats info:

Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address

what does this mean exactly? 'source to here' and 'this node/link'? I
don't
understand? why are there 2 sections for packet loss for each hop?

2) look at hop 10 below in the stats section. How can there be 100% packet
loss and still get through to the target host?

3) is it normal for the RTT to get longer as you get farther along the
path?

Tracing route to targethost.domain.com [226.128.52.8]
over a maximum of 30 hops:

0 219.188.229.92
1 10.10.0.1
2 219.188.229.2
3 219.188.233.2
4 65.221.176.115
5 68.18.75.155
6 218.52.7.35
7 139.240.4.27
8 139.240.5.62
9 139.240.29.24
10 219.178.95.244
11 226.178.47.4
12 226.128.52.8

Computing statistics for 300 seconds...

Source to Here This Node/Link

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

0 219.188.229.92

0/ 100 = 0% |

1 0ms 0/ 100 = 0% 0/ 100 = 0% 10.10.0.1

0/ 100 = 0% |

2 15ms 0/ 100 = 0% 0/ 100 = 0% 219.188.229.2

0/ 100 = 0% |

3 20ms 2/ 100 = 2% 2/ 100 = 2% 219.188.233.2

0/ 100 = 0% |

4 19ms 0/ 100 = 0% 0/ 100 = 0% 65.221.176.115

0/ 100 = 0% |

5 29ms 0/ 100 = 0% 0/ 100 = 0% 68.18.75.155

0/ 100 = 0% |

6 23ms 0/ 100 = 0% 0/ 100 = 0% 218.52.7.35

0/ 100 = 0% |

7 26ms 0/ 100 = 0% 0/ 100 = 0% 139.240.4.27

0/ 100 = 0% |

8 108ms 1/ 100 = 1% 1/ 100 = 1% 139.240.5.62

0/ 100 = 0% |

9 118ms 0/ 100 = 0% 0/ 100 = 0% 139.240.29.24

0/ 100 = 0% |

10 --- 100/ 100 =100% 100/ 100 =100% 219.178.95.244

0/ 100 = 0% |

11 113ms 1/ 100 = 1% 1/ 100 = 1% 226.178.47.4

0/ 100 = 0% |

12 118ms 0/ 100 = 0% 0/ 100 = 0% 226.128.52.8

Trace complete.
Click to expand...
Click to expand...
Click to expand...
 
Back
Top