07-24-2013 01:52 AM - edited 03-11-2019 07:16 PM
Hello all,
Can you please help me to understand why i am gettign same IP repated in trace route:-
tracert 103.1.191.10
Tracing route to 103.1.191.10 over a maximum of 30 hops
1 <1 ms <1 ms <1 ms 10.10.10.10
2 <1 ms <1 ms <1 ms 10.10.10.120
3 <1 ms <1 ms <1 ms 19.20.146.241
4 1 ms <1 ms <1 ms 38.100.34.8
5 193 ms 3 ms 207 ms 66.250.10.1
6 1 ms 1 ms 1 ms 15.54.30.225
7 7 ms 7 ms 7 ms 15.54.42.30
8 8 ms 8 ms 8 ms 15.54.47.30
9 8 ms 7 ms 7 ms 66.28.4.229
10 8 ms 8 ms 8 ms 15.24.2.22
11 8 ms 8 ms 8 ms 38.104.73.198
12 226 ms 226 ms 226 ms 19.227.108.133
13 279 ms 281 ms 279 ms 14.30.1.42
14 274 ms 275 ms 278 ms 10.10.18.243
15 275 ms 275 ms 274 ms 10.10.18.243
16 277 ms 276 ms 274 ms 10.10.18.243
17 275 ms 275 ms 275 ms 10.10.18.243
18 275 ms 296 ms 275 ms 10.10.18.243
19 275 ms 275 ms 276 ms 10.10.18.243
20 275 ms 275 ms 275 ms 10.10.18.243
21 276 ms 275 ms 275 ms 10.10.18.243
22 276 ms 275 ms 275 ms 10.10.18.243
23 275 ms 275 ms 275 ms 10.10.18.243
24 275 ms 275 ms 276 ms 10.10.18.243
25 276 ms 276 ms 276 ms 10.10.18.243
26 276 ms 276 ms 276 ms 10.10.18.243
27 277 ms 276 ms 276 ms 10.10.18.243
28 277 ms 276 ms 276 ms 10.10.18.243
29 279 ms 299 ms 276 ms 10.10.18.243
30 276 ms 276 ms 277 ms 10.10.18.243
Trace complete.
Thanks in advance
Jagdev
07-24-2013 07:07 AM
The most likely cause is that the traffic is passing through a firewall with a global NAT rule at that point. Every returned packet from that point and beyond will have the NAT address, not the real IP of the hop that decremented the TTL and sent an icmp echo reply.
07-24-2013 11:18 PM
Thanks Marvin,
Yes, you are right, there is global NAT and this IP 103.1.191.10 (Destination IP) NATed IP, on the same Firewall
10.10.18.243. Is there any fix available.
Thanks
Jagdev
07-25-2013 05:42 AM
You're welcome,
If it is a Cisco ASA or Pix, the gloabl policy needs to be modified to accomodate traceroute. Cisco has an article on how to do so here.
Other vendors would need a similar remedy applied.
Please rate helpful responses.
08-11-2016 08:31 AM
Hi Marvin,
I am also getting the same issue but I have no firewall rather a router is doing NAT and a outside static nat is configured. But from inside it is showing all the nodes. Can you explain why this is happening ? For better understanding snapshot is given. Please let me know if you need more information.
ip nat outside source static 20.20.20.20 100.100.100.5 ( Router 2)
Traceroute from outside PC
======================
PC>tracert 10.10.10.20
Tracing route to 10.10.10.20 over a maximum of 30 hops:
1 0 ms 1 ms 1 ms 20.20.20.1
2 0 ms 0 ms 0 ms 10.10.10.20 (Here we should see the Router 2 as next-hop. NAT is configured on R2)
3 1 ms 0 ms 1 ms 10.10.10.20
4 * 10 ms 0 ms 10.10.10.20
Trace complete.
03-25-2019 08:22 PM
Link is broken
03-25-2019 09:49 PM
MY-4506#traceroute 10.196.208.51
Type escape sequence to abort.
Tracing the route to 10.196.208.51
VRF info: (vrf in name/id, vrf out name/id)
1 192.168.173.1 0 msec 4 msec 0 msec
2 10.196.208.51 148 msec 144 msec 128 msec
3 10.196.208.51 120 msec 136 msec 124 msec
4 10.196.208.51 128 msec 140 msec 120 msec
5 10.196.208.51 156 msec 156 msec 160 msec
6 10.196.208.51 156 msec 160 msec 164 msec
7 10.196.208.51 180 msec 176 msec 180 msec
8 10.196.208.51 180 msec 180 msec 180 msec
9 * *
Can anyone help? All the links with the answers are broken.
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