Traceroute makes sure that each hop on the way to a destination device drops a packet, and sends back an ICMP error message. Now you have the RTT, or “Round-Trip Time”, for each hop. It does this by sending multiple waves of data packets out, increasing the TTL for the packets each time.
When using traceroute Why are some of the hop IPS the same even though the destinations are different?
The reason for that result on a trace is that, some ISP, does load balance in his Autonomus System, thats it: same destination across diferent ways. This is the reason that you looks, in the same hop, ex: 4, 5 and 6, that one packet goes hrough every one of the links that can reach the destination.
Can you get the same IP twice?
Unless your router malfunctions, two devices should never get the same IP address under this system. Your router knows which IP addresses are already in use and won’t give them out twice. Another IP conflict scenario can occur if you have two DHCP servers on your network (which you should avoid).
Why the number of hops and or the IP addresses of the hops would be different when running the traceroute command at different times for the same website?
The answer is simply that different hosts are on different networks, as @radhil says, and you have to take longer paths to get there.
How many hops should a traceroute take?
30 hops
Traceroute, by default, measures 30 hops of 60-byte packets. You can tell here where hop one actually landed, and then there are three numerical values.
Why does traceroute give different results on different networks and sometimes on the same network )?
Trace route provides a description of the path between your current IP address and a destination IP address in the form of hops. By “different networks” in your question it would seem you are changing the source and hence it would be impossible to get the same result.
Can traceroute command work across the firewall?
Traceroute uses ICMP(type 30) under Windows and UDP under UNIX. To be able to use traceroute via a firewall the firewall needs to allow echo replies/requests. The way traceroute works is by sending packets toward the final destination and incrementing ttl with each packet sent.
Are traceroute times cumulative?
Note also that these times are cumulative, so it’s really the differences between the average for each router that’s important.
Why do I see the same IP address twice in traceroute?
In some cases, a tunnel interface can bring one hop visible in a traceroute output twice. You are running your traceroute through an MPLS backbone, aren’t you? It’s strange you see the same IP addresses in the output while running traceroute both directions.
Can a tunnel interface be used twice in a traceroute?
In some cases, a tunnel interface can bring one hop visible in a traceroute output twice. You are running your traceroute through an MPLS backbone, aren’t you?
Why does traceroute take so long to answer?
Because traceroute does this multiple times you’re going to get back (if you have a richly connected network, as is the internet) multiple answers at some of the counts. it may be the case that a particular Gateway will answer at different amounts away because the route to that gateway went through different hops.
Why do I see multiple IP addresses in Linux?
The Linux manual will have similar wording. The multiple IP addresses that you see are the gateways responding to the individual probes at specific hop limits. In your case, the three probes resulted in replies that, at hop limit 3, came back to you from the gateways at 221.11.155.65 and at 221.11.165.9.
