From: Blanco Lam (b@gclamb.com)
Date: Mon Aug 04 2003 - 12:09:42 GMT-3
Tom,
Traceroute(tracert) from a Windows host uses ICMP which is what PING uses.
Traceroute from a Cisco router uses UDP and not ICMP - hence you can ping from
the router to the destination and not trace (ACL or firewall before the last
hop allowing only ICMP and not UDP packets).
Regards,
Blanco
---- Original message ----
>Date: Tue, 5 Aug 2003 00:03:49 +0900 (JST)
>From: Tom Young <gitsyoung@yahoo.co.jp>
>Subject: RE: could ping but couldn't traceroute
>To: Scott Morris <swm@emanon.com>
>Cc: ccielab@groupstudy.com
>
>But if I trace it from a PC, it hasn't any problem
>Why?
>I really confused.
>
>
>
>C:\>tracert 210.178.28.2
>
>Tracing route to 210.178.28.2 over a maximum of 30 hops
>
> 1 <10 ms <10 ms <10 ms
>rt001.bb024-01.uda.im.wakwak.ne.jp [61.125.41.1]
>
> 2 <10 ms <10 ms 10 ms fbe012.nw.wakwak.com
>[219.103.128.14]
> 3 <10 ms <10 ms 10 ms fleast1g.nw.wakwak.com
>[219.103.128.1]
> 4 <10 ms <10 ms 10 ms
>phgwdnp0g0-0-0.nw.xephion.ne.jp [211.132.135.217
>]
> 5 <10 ms 10 ms <10 ms
>phcrdnp3g0-0-0.nw.xephion.ne.jp [211.9.229.140]
>
> 6 <10 ms <10 ms 10 ms
>phbddnp1g1-1-0.nw.xephion.ne.jp [211.9.229.34]
> 7 <10 ms <10 ms 10 ms AS4694.ix.jpix.ad.jp
>[210.171.224.49]
> 8 <10 ms <10 ms 10 ms
>GigaEthernet2-1.tokg4.idc.ad.jp [158.205.224.153
>]
> 9 <10 ms <10 ms 10 ms ge3-0.tokg1.idc.ad.jp
>[158.205.192.150]
> 10 150 ms 201 ms 210 ms POS5-0-0.yok1.idc.ad.jp
>[158.205.224.46]
> 11 10 ms <10 ms <10 ms fe1-0.yoka2.idc.ad.jp
>[158.205.235.69]
> 12 30 ms 20 ms 20 ms 158.205.200.74
> 13 140 ms 90 ms 170 ms 210.178.28.66
> 14 30 ms 40 ms 70 ms 210.178.28.2
>
>Trace complete.
>
>C:\>
>
>
> --- Scott Morris <swm@emanon.com> c c c.c!cc;c<c8o<
>> Traceroute uses high port udp as the transport.
>> Ping uses ICMP.
>>
>> Access list or firewall rules in between permitted
>> one but not the
>> other.
>>
>> Scott
>>
>>
>> -----Original Message-----
>> From: nobody@groupstudy.com
>> [mailto:nobody@groupstudy.com] On Behalf Of
>> Tom Young
>> Sent: Monday, August 04, 2003 5:28 AM
>> To: ccielab@groupstudy.com
>> Subject: could ping but couldn't traceroute
>>
>>
>> Hi, group
>>
>> A very strange question, for a global address,
>> I
>> could ping it, but couldn't traceroute it. WHY ?
>> I really confused.
>>
>> Thanks alot
>>
>> User Access Verification
>>
>> Password:
>> office01>en
>> Password:
>> office01#trace
>> office01#traceroute 210.178.28.2
>>
>> Type escape sequence to abort.
>> Tracing the route to 210.158.218.2
>>
>> 1 202.248.86.129 0 msec 0 msec 4 msec
>> 2 133.160.0.1 12 msec 8 msec 12 msec
>> 3 133.160.239.34 8 msec 12 msec 8 msec
>> 4 133.160.191.133 20 msec 20 msec 20 msec
>> 5 133.160.224.51 24 msec 16 msec 12 msec
>> 6 133.160.30.32 16 msec 20 msec 20 msec
>> 7 133.160.240.254 16 msec 16 msec 16 msec
>> 8 133.160.12.74 21 msec 16 msec 12 msec
>> 9 210.171.224.49 12 msec 12 msec 12 msec
>> 10 158.205.192.197 16 msec 12 msec 12 msec
>> 11 158.205.192.150 16 msec 20 msec 16 msec
>> 12 158.205.224.46 16 msec 16 msec 16 msec
>> 13 158.205.235.69 16 msec 16 msec 16 msec
>> 14 158.205.200.74 36 msec 36 msec 28 msec
>> 15 * * *
>> 16 * * *
>> 17 * * *
>> 18 * * *
>> 19 * * *
>> 20 * * *
>> 21 * * *
>> 22 * * *
>> 23 * * *
>> 24 * * *
>> 25 * * *
>> 26 * * *
>> 27 * * *
>> 28 * * *
>> 29 * * *
>> 30 * * *
>> office01#ping 210.178.28.2
>>
>> Type escape sequence to abort.
>> Sending 5, 100-byte ICMP Echos to 210.158.218.2,
>> timeout
>> is 2 seconds:
>> !!!!!
>> Success rate is 100 percent (5/5), round-trip
>> min/avg/max
>> = 12/14/16 ms
>> office01#
>>
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