traceroute missing hop

 
Thread Tools Search this Thread
Operating Systems Linux Red Hat traceroute missing hop
# 1  
Old 10-20-2011
traceroute missing hop

Hi,

I am having some performance issues with my JBOSS application server and have noticed something strange in my traceroute.

Can anyone explain the following output please?

Code:
# traceroute 196.10.101.51 8080
traceroute to 196.10.101.51 (196.10.101.51), 30 hops max, 8080 byte packets
 1  192.168.235.1 (192.168.235.1)  0.346 ms  0.393 ms  0.434 ms
 2  10.247.243.5 (10.247.243.5)  4.066 ms  4.303 ms  4.358 ms
 3  217.145.64.2 (217.145.64.2)  5.381 ms  6.002 ms  6.569 ms
 4  v79.thn-core-10.edgetelecom.net.uk (212.38.84.233)  4.447 ms  4.430 ms  4.412 ms
 5  gi2.thn-peer-1.edgetelecom.net.uk (212.38.84.230)  2.742 ms  2.726 ms  2.707 ms
 6  ge-3-3-0.mpr1.lhr3.uk.above.net (195.66.226.76)  3.277 ms  2.140 ms  2.072 ms
 7  213-152-230-91.mtnns.net (213.152.230.91)  9.894 ms  37.534 ms  37.518 ms
 8  * * *
 9  mtn-rb-1--rb-ad-1-a.mtnns.net (196.44.8.211)  223.835 ms * *
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *
15  * * *
16  * * *
17  * * *
18  * * *
19  * * *
20  * * *
21  * * *
22  * * *
23  * * *
24  * *

Looks like packet loss somewhere especially from hop 7-8??

R,
D.
# 2  
Old 10-20-2011
What happens if you run traceroute with the -n option?
# 3  
Old 10-20-2011
Quote:
Originally Posted by Duffs22
Looks like packet loss somewhere especially from hop 7-8??
Doesn't mean 7 is dropping packets -- how could you get response from hop 8? 7 just isn't bothering to answer requests directed to itself.

Hop 10 and on really looks to be dropping, though.
# 4  
Old 10-21-2011
Hi,

The exact same result with the "-n" option.

Code:
# traceroute  -n 196.10.101.51 8080
traceroute to 196.10.101.51 (196.10.101.51), 30 hops max, 8080 byte packets
 1  192.168.235.1  0.377 ms  0.396 ms  0.466 ms
 2  10.247.243.5  4.249 ms  4.395 ms  4.559 ms
 3  217.145.64.2  5.133 ms  5.119 ms  5.533 ms
 4  212.38.84.233  4.293 ms  4.330 ms  4.313 ms
 5  212.38.84.230  3.048 ms  3.031 ms  3.014 ms
 6  195.66.226.76  3.212 ms  3.215 ms  3.167 ms
 7  213.152.230.91  33.111 ms  30.342 ms  30.345 ms
 8  * * *
 9  196.44.8.211  223.545 ms  223.303 ms  223.505 ms
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *

Just trying to understand what is happening and why it misses a hop?

R,
D
# 5  
Old 10-27-2011
It misses a hop because ICMP replies of the sort used in traceroute are somewhat optional. Not all servers bother to send them.
# 6  
Old 10-27-2011
there is however tcptraceroute honest responses t which are less optional
Login or Register to Ask a Question

Previous Thread | Next Thread

6 More Discussions You Might Find Interesting

1. SuSE

How to resolve missing missing dependencies with opensuse 11.3 and 12.3?

Hello, This is a programming question as well as a suse question, so let me know if you think I should post this in programming. I have an application that I compiled under opensuse 12.2 using g77-3.3/g++3.3. The program compiles and runs just fine. I gave the application to a colleague who... (2 Replies)
Discussion started by: LMHmedchem
2 Replies

2. IP Networking

Traceroute

I have some question about traceroute: 1. Can we hide our computer from traceroute? (2 Replies)
Discussion started by: budiantho_indra
2 Replies

3. UNIX for Dummies Questions & Answers

traceroute

Good afternoon Can anyone explain traceroutes to me and when it would be necessary/what situations would call one to use it? (2 Replies)
Discussion started by: iamnew2solaris
2 Replies

4. IP Networking

Traceroute doesn't show gateway as hop

I have a Linux server connected to the Internet like so: Server (66.77.88.130) -> /29 VLAN Gateway (66.77.88.129) -> Core Router (64.0.0.1) -> Internet If I run a traceroute from my server to an arbitrary site on the internet I get a result like this: # traceroute some-other-server... (2 Replies)
Discussion started by: ramnet
2 Replies

5. UNIX for Advanced & Expert Users

traceroute

Hi, Can any one suggest me an add on feature for the traceroute command. Thanks in advance. Regards, Selvi (4 Replies)
Discussion started by: salvi
4 Replies

6. Programming

how we can use traceroute

how we can use traceroute in unix c so how we can get the output of traceroute command in c thank u,inadvance sree (3 Replies)
Discussion started by: phani_sree
3 Replies
Login or Register to Ask a Question