Dear Stefan, I have an 7206VXR Router with this design: int gig 0/1: directly connected to 3750 switch (uplink to internet) int gig 0/2: vlan termination from PSTN centers int virtual-template1: xdsl users Its about 4 days that I see near 300Mpbs outbound traffic in int gig0/1 that there is no such a traffic in none of routers interface, but the same traffic is seen in 3750 peer interface. I try to run monitor session on 3750 and monitor port traffic which I see that packet is generating from a user and its in a loop between 3750 and 7206. When I disconnect that user, I see that that packet is in loop again, because of that I am sure its making a loop but I do not know the reseaon is that packets or not. Thanks On Sat, Jul 21, 2012 at 11:02 PM, Stefan Fouant < sfouant@shortestpathfirst.net> wrote:
Can you give us more information? What do you mean it is causing Layer 3 loops?
Stefan Fouant
Sent from my HTC on the Now Network from Sprint!
----- Reply message ----- From: "Shahab Vahabzadeh" <sh.vahabzadeh@gmail.com> Date: Sat, Jul 21, 2012 10:50 am Subject: Attack on UDP 101 To: <nanog@nanog.org>
Hi there, Does any body know any report about attack on UDP Port 101 which make Layer 3 Loops? This is an example sniff:
Source IP Address is : 76.164.199.86 Source port: 62946 Destination port: 101 2012-07-21 11:11:09.646757
Thanks
-- Regards, Shahab Vahabzadeh, Network Engineer and System Administrator
Cell Phone: +1 (415) 871 0742 PGP Key Fingerprint = 8E34 B335 D702 0CA7 5A81 C2EE 76A2 46C2 5367 BF90
-- Regards, Shahab Vahabzadeh, Network Engineer and System Administrator Cell Phone: +1 (415) 871 0742 PGP Key Fingerprint = 8E34 B335 D702 0CA7 5A81 C2EE 76A2 46C2 5367 BF90