[107655] in North American Network Operators' Group
RE: duplicate packet
daemon@ATHENA.MIT.EDU (Eric Van Tol)
Wed Sep 10 08:06:11 2008
From: Eric Van Tol <eric@atlantech.net>
To: 'chloe K' <chloekcy2000@yahoo.ca>, "nanog@nanog.org" <nanog@nanog.org>
Date: Wed, 10 Sep 2008 08:06:02 -0400
In-Reply-To: <473679.44924.qm@web57413.mail.re1.yahoo.com>
Errors-To: nanog-bounces@nanog.org
> -----Original Message-----
> From: chloe K [mailto:chloekcy2000@yahoo.ca]
> Sent: Wednesday, September 10, 2008 6:46 AM
> To: nanog@nanog.org
> Subject: duplicate packet
>
> Hi all
>
> When I ping the ip, I get the duplicate
>
> I check the ip is just one. Why it happens?
>
> Thank you
>
> 64 bytes from 192.168.0.95: icmp_seq=3D1 ttl=3D63 time=3D0.344 ms
> 64 bytes from 192.168.0.95: icmp_seq=3D1 ttl=3D63 time=3D0.401 ms (DUP!)
> 64 bytes from 192.168.0.95: icmp_seq=3D2 ttl=3D63 time=3D0.296 ms
> 64 bytes from 192.168.0.95: icmp_seq=3D2 ttl=3D63 time=3D0.328 ms (DUP!)
> 64 bytes from 192.168.0.95: icmp_seq=3D3 ttl=3D63 time=3D0.291 ms
> 64 bytes from 192.168.0.95: icmp_seq=3D3 ttl=3D63 time=3D0.316 ms (DUP!)
> 64 bytes from 192.168.0.95: icmp_seq=3D4 ttl=3D63 time=3D0.279 ms
> 64 bytes from 192.168.0.95: icmp_seq=3D4 ttl=3D63 time=3D0.309 ms (DUP!)
> 64 bytes from 192.168.0.95: icmp_seq=3D5 ttl=3D63 time=3D0.271 ms
> 64 bytes from 192.168.0.95: icmp_seq=3D5 ttl=3D63 time=3D0.299 ms (DUP!)
Check to see whether or not the port connected to that host is mirrored or =
in a SPAN VLAN. Misconfiguration on an analyzer server can cause duplicate=
traffic to be generated.
-evt
