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Webcast-Catalyst9k
New Member

traceroute at window cmd, 3 same hop and then time out.

I wonder if why I traceroute at window command, the result like below:


C:\Documents and Settings\HZNJWY>tracert abc.dd.3.66 -d

Tracing route to abc.dd.3.66 over a maximum of 30 hops

  1    <1 ms    <1 ms    <1 ms  aaa.bbb.8.1
  2    <1 ms    <1 ms    <1 ms  aaa.bbb.104.74
  3    <1 ms    <1 ms    <1 ms  aaa.bbb.104.18
  4     9 ms     7 ms     6 ms  117.105.104.5
  5     1 ms    <1 ms    <1 ms  abc.dd.3.66
  6    10 ms     8 ms     3 ms  abc.dd.3.66
  7     2 ms     2 ms    <1 ms  abc.dd.3.66
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
10     *        *        *     Request timed out.
11     *        *        *     Request timed out.
12     *        *        *     Request timed out.
13     *        *        *     Request timed out.
14     *        *        *     Request timed out.
15     *        *        *     Request timed out.
16     *        *        *     Request timed out.
17     *        *        *     Request timed out.
18     *        *        *     Request timed out.
19     *        *        *     Request timed out.
20     *        *        *     Request timed out.
21     *        *        *     Request timed out.
22     *        *        *     Request timed out.
23     *        *        *     Request timed out.
24     *        *        *     Request timed out.
25     *        *        *     Request timed out.
26     *        *        *     Request timed out.
27     *        *        *     Request timed out.
28     *        *        *     Request timed out.
29     *        *        *     Request timed out.
30     *        *        *     Request timed out.

Trace complete.

you can see like below:

  5     1 ms    <1 ms    <1 ms  abc.dd.3.66
  6    10 ms     8 ms     3 ms  abc.dd.3.66
  7     2 ms     2 ms    <1 ms  abc.dd.3.66

and then nexthop is requested timed out.

What's happening on abd.dd.3.66?, in this case, routing issue or not?

Could you check me for that please?

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: traceroute at window cmd, 3 same hop and then time out.

Hello,

The reason could be that the device with address abc.dd.3.66 is performing NAT. If that device blocks ICMP from devices behind it (after certain level), then you will see that kind of response.

Hope this helps.

Regards,

NT

1 REPLY
Cisco Employee

Re: traceroute at window cmd, 3 same hop and then time out.

Hello,

The reason could be that the device with address abc.dd.3.66 is performing NAT. If that device blocks ICMP from devices behind it (after certain level), then you will see that kind of response.

Hope this helps.

Regards,

NT

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