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Questions tagged [traceroute]

For questions about trace routing where, for instance, you are troubleshooting routing issues or have problems using the traceroute command via CLI on a network device.

3
votes
1answer
247 views

Slower hops in traceroute

What are the main reasons why some routers that appear in the traceroute output have a greater round trip time?
2
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1answer
336 views

If traceroute fails why does ping still work?

If I can ping a router successfully, why is it that when I do traceroute, it stops at a particular interface and says "ICMP type:3, code:3, Destination port unreachable". Doesn't that mean that it can'...
3
votes
3answers
130 views

Is it possible to perform a Layer 2 (MAC address) traceroute?

I understand the difference between layer2 & layer3 and MAC & IP. I understand address resolution protocol, etc. But is there any way to do a traceroute that will show Layer 2 information? For ...
3
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4answers
4k views

Are ping-times directly related to location/distance?

Suppose I want to determine if an IP is located in my country, without a third-party servvice. Could I estimate that to a certain degree by measuring ping times? Or is it better to look at the number ...
1
vote
3answers
72 views

Whether the traceroute command only can check “to” path, can not check “back” path?

How to detect the router path of traffic? I use the ipip.net for ICMP traffic: I want to check the out path and back path. such as I have A address 60.248.41.135 and B address 103.248.41.135. ...
0
votes
1answer
35 views

Is that tracrt output normal?

I have found serveral examples where the last tracert hop is shown twice but not exactly an outlput like I've got here: The network setup look like that: Between the two sophos UTM firewalls 77.77....
5
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2answers
839 views

IP Traceroute RFC 1393

Is RFC 1393 implemented by real routers in practice? Are there any tools that generate traceroutes using it?
1
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1answer
749 views

How do you use strict/lose source tracerouting with Cisco IOS

I have been trying to guess the syntax but, I can't figure out how to do it Based on the above diagram, what should be the traceroute command on R1 to force the traffic go via R1->R2->R4?
11
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2answers
13k views

traceroute many hops with the same ip

I'm a software developer that sometimes has to do some easy network tasks but knows almost nothing about it. I'm having some problems with a vps I rent ( ENJOY VPS: Unmanaged VPS - Medium VPS) and ...
1
vote
1answer
264 views

Quagga - Configure 3 routers using OSPF

Hi I'm trying to use quagga to connect 3 routers but the middle one doen't complete the path that a trace route command would do even though it knows where the target address is. It seems that ...
3
votes
1answer
504 views

Does traceroute show the IP address of the entry port? or exit port?

Does traceroute show the IP address of the entry port? or exit port? For example, if there is an intermediary router in the path with 198.28.56.18 facing the source (entry port), and 65.86.24.136 ...
0
votes
1answer
61 views

traceroute and ping behaviour through cisco router

Trying to do a traceroute to a particular destination, the result seems that the destination is unreachable. But when i ping the destination, the destination is replying well. could anyone help to ...
0
votes
1answer
102 views

Ping and tracert command result [closed]

Here i have the response when i use commands ping and tracert for google.com Now, i am still new to networking, but i need to know how to interpret the response that i got here: 1) First off, i need ...
1
vote
2answers
304 views

Why there is only one hop in the tracert?

I use the tracert to a remote server IP address: C:\Users\lll>tracert 103.224.19.11 Track by up to 30 hops The route to f1.FF-SALE.COM [103.224.19.11]:    1 44 ms 44 ms 44 ms f1.FF-SALE.COM [103....
1
vote
1answer
26 views

how does Trace route packet work

I am fining difficulties understanding trace route command how does trace route works from source to a destination? how the routers reply to the source with their IP? thank you
1
vote
2answers
64 views

Explanation of traceroute

Can anyone help me to explain the results of this traceroute. Why on hop 2 will latency suddenly increase? and decreases at hop 3 and will rise significantly to hop to 8.
1
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1answer
63 views

Why there still need a parenthesis contains it again in traceroute logs?

I traceroute to 104.210.32.76: Traceroute Starting… traceroute to 104.210.32.76 (104.210.32.76), 64 hops max, 72 byte packets 1 10.10.10.1 (10.10.10.1) 25.326 ms 1.344 ms 1.135 ms 2 100.64.0....
0
votes
2answers
52 views

How does traceroute identify destinations to 'hop' to? [duplicate]

When using the traceroute command. For example: $ traceroute google.com The output I get shows hop No. | hostname (ip) | latency 1 | latency 2 | latency 3 Which for google shows the following: ...
1
vote
1answer
48 views

Are traceroute hop latency measurements relative to the previous hop or to the origin?

With traceroute output of this: traceroute to google.com (216.58.223.14), 64 hops max, 52 byte packets 1 192.168.119.1 (192.168.119.1) 1.321 ms 0.980 ms 0.936 ms 2 rtr3-c16-dc1.macrolan.co.za (...
0
votes
1answer
31 views

How frequently do request/response traceroute paths differ? [closed]

If you use the 'ping' command in a terminal, how frequently (if ever) do the network paths to/from the destination differ? What could cause such paths to differ?
5
votes
2answers
358 views

Why there are ip(ip) and domain(ip) 's difference and multi rows records in the traceroute?

In the traceroute command: $ traceroute 104.43.54.2 traceroute to 104.43.54.2 (104.43.54.2), 64 hops max, 52 byte packets 1 10.10.10.1 (10.10.10.1) 4.852 ms 4.623 ms 1.588 ms 2 100.64.0.1 (100....
3
votes
1answer
1k views

Traceroute UDP port question

I know, that traceroute uses UDP, and for destination port it starts with 33434. Then, with each next hop it increments the destination port number by 1. The questions is: why does traceroute need to ...
1
vote
2answers
95 views

Does RTT in same network can be larger suddenly in tracert?

For the homework, I executed tracert command in the cmd to a specific site. I got the result and there was a sudden increasing point, but it was strange. I'm Korean and I used tracert to US site so ...
3
votes
2answers
64 views

Why does ip routing not take an even remotely direct route?

I ran a traceroute on a url to a server we own in New York. I'm in central Florida. Traceroute showed the request being directed to west Florida and then far south Florida before finally being ...
1
vote
1answer
172 views

Why does traceroute gives different number of hops for different protocols used?

While exploring traceroute with different protocols, it gave me the following response: For TCP: user@200411DC0:~$ sudo traceroute -T facebook.com traceroute to facebook.com (157.240.16.35), 30 hops ...
0
votes
1answer
42 views

Router - can I remotely force a router to send my packets through a specific route? (in packet/network layer) [closed]

I'm a newbie in network programming in C/C++ and I'm working on raw sockets to program a simple ping or traceroute application as they are written in common network programming books. Programs like ...
1
vote
3answers
81 views

Spoofed Tunnel Route

What does it mean when tracert always shows a single long jump? The route below is always the same except the last hop goes directly to any destination IP address that I choose. And, how does the ...
2
votes
2answers
2k views

Difference in number of hops in Traceroute

I was experimenting with some of the network monitoring commands in cmd and I noticed that there's a significant difference in the number of hops in the output of tracert for different hosts. For ...
6
votes
5answers
2k views

traceroute doesn't print entire route sometimes

Monitoring my network I realized some time ago that traceroute used to print routes more complete than it is doing right now... and, right now, sometimes traceroute omits some devices. For example, ...
1
vote
1answer
192 views

How would you map a network at layer 2 without CDP or LLDP?

I'm on an ASA right now and can path my directly connected next hop devices via IP address, but I want to make sure there isn't a switch in between. Another related question, when I "show arp" it ...
1
vote
1answer
261 views

Tracert getting timeout on second packet consistenly

I'm on a vpn and tracing to virtualmachines that live in the VPN Server. I've been experiencing slow queries, when they should be fast. below is what the trace is returning. I'm curious as to why the ...
3
votes
1answer
1k views

difference between reverse, forwarding and return path on traceroute

As described on the title, I can't make difference between reverse, forwarding and return path, especially between reverse and return path. Also, how the RTT is affected by the reverse, forwarding ...
3
votes
1answer
79 views

Same hop appears 4 times on a traceroute [closed]

When I traceroute bbc.co.uk in my home Network the first hop appears 4 times. What could be causing this ? @Latitude-7480 ~ $ tracepath bbc.co.uk 1?: [LOCALHOST] ...
1
vote
2answers
756 views

Traceroute IP-address mismatch

I'm doing some traceroute scans and just realized, that there is an IP-address mismatch. Closer, my public IP-address doesn't match with the next HOP IP-address of my ISP. So, when I scan the public ...
2
votes
1answer
180 views

Traceroute for http sites endless loop

I used following command - traceroute -m 255 www.bbc.com and result is an endless loop. I also tried on some other http sites, same result. I also used online traceroute service like monitis which ...
0
votes
1answer
199 views

Trace route does not complete and applicatin fails to connect but website works in browser [closed]

I am trying to narrow down a problem with intermittent connectivity issues to a remote service hosted via HTTPS. The application frequently fails to establish the SSL tunnel during the CONNECT phase. ...
0
votes
1answer
125 views

HTTP server responds with TTL- exceeded for TCP-SYN till TTL is increased by +2 from the actual number of hops

Trying to traceroute an HTTP server using TCP-SYN packets. There are 13 hops between the two hosts, but the server responds with TTL-exceeded for TTL=13 and TTL=14. It replies with TCP SYN-ACK only ...
1
vote
3answers
272 views

Traceroute inside a per packet load balancing based infrastructure

Could you confirm that in an infrastructure configured with "per packet" load balancing on the Routers (same route same metric), the usage of traceroute become unusable ? In this case the ...
1
vote
2answers
639 views

Traceroute only showing private layer3 hops and then direct end destination

I am doing a traceroute to salesforce.com, google.com and I see all the layer hops to my Firewall and then one hop to final destination- which is incorrect. I am not seeing any of the intermediate ...
2
votes
2answers
216 views

Why traceroute is still Used?

currenty I'm reading an article about 'Paris traceroute' , as i understood The Classical Traceroute give inexact information about the path that a packet traverse , 'incorrect links , missed nodes '....
0
votes
1answer
697 views

No response to ICMP (traceroute)

192.168.1.37 can ping 192.168.0.22, but can't ping 192.168.0.240 subnet masks are 255.255.255.0 on all hosts in question Switch/gateway in the middle (192.168.1.253) can ping both of these ...
1
vote
1answer
40 views

To what degree does the variance of the latency for the three ICMP messages sent back per hop in a traceroute matter?

Does the variance of the latency for the three ICMP messages sent back for each hop in a traceroute help to troubleshoot issues?
0
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2answers
275 views

Traceroute program that does not rely on ICMP echo requests?

Is there any Traceroute program that does not rely on ICMP echo requests? The question is very straight forward, and I can't get into more details at the moment.
2
votes
2answers
735 views

Trace Route RTO in one hop but next hop works

Today when I was doing tracert, in the 6th Hop I get RTO but my next hop seems to be reachable. How come it works? 6 * * * Request Timed Out 7 58ms 58ms ...
1
vote
1answer
60 views

cisco network meanings and traceroute

I have a small network here. The connection from router 1 to router 3 is relevant. I have two questions in one. On the one hand I would be interested, why at Cisco between the routers always this red ...
0
votes
1answer
428 views

Difference in number of hops calculated using ping vs traceroute

I pinged a host using the minimum TTL value that didn't elicit a 'Time to live exceeded' response to calculate the number of hops between us. When I used traceroute, that number was a little bigger. ...
1
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2answers
117 views

how to Prevent hosts to traceroute their G.W ?

I want to prevent all hosts from seeing the core router when they do traceroute , knowing that I'm using cisco router , any idea to do this ?
1
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2answers
422 views

Traceroute to another interface of a router

When I try to traceroute to a remote server, I found that most likely the first router interface where the packet arrives responds to traceroute. Is it possible to ask another interface of the router ...
2
votes
1answer
169 views

Traceroute of Router's own serial port

I got two routers on my network and I am pinging one router's serial port ip address from that router itself. by checking traceroute I found ping is going outside to neighbor router which is directly ...
1
vote
3answers
442 views

How to differentiate between UDP traceroute packet and the normal data traffic?

I am a programmer and we can filter out the packets in the router to manipulate the IP or MPLS headers. My question is there any way to distinguish between UDP 1 byte traceroute data vs user traffic ...