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 < sfou...@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.vahabza...@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