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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I tweaked “nd ns-interval” and the problem hasn’t returned yet. I will try your recommendation if it comes back. Thank you.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Calibri Light",sans-serif;color:#1F497D'>Regards,</span><span style='font-size:9.5pt;font-family:"Arial",sans-serif;color:#500050'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white'><span style='font-size:9.0pt;font-family:"Calibri Light",sans-serif;color:#1F497D'>Nick </span><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:#222222'><o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Jörg Kost <jk@ip-clear.de> <br><b>Sent:</b> Friday, March 15, 2019 4:53 PM<br><b>To:</b> nick@ramnode.com<br><b>Cc:</b> foundry-nsp@puck.nether.net<br><b>Subject:</b> Re: [f-nsp] MLX IPv6 NCE<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p><span style='font-family:"Arial",sans-serif'>Hi Nick,<o:p></o:p></span></p><p><span style='font-family:"Arial",sans-serif'>does<o:p></o:p></span></p><blockquote style='border:none;border-left:solid #777777 1.5pt;padding:0in 0in 0in 4.0pt;margin-left:0in;margin-right:0in;margin-bottom:3.75pt'><p><span style='font-family:"Arial",sans-serif;color:#777777'>show ipv6 | include host drop cam<o:p></o:p></span></p></blockquote><p><span style='font-family:"Arial",sans-serif'>(config)#ipv6 max-host-drop-cam 256<o:p></o:p></span></p><p><span style='font-family:"Arial",sans-serif'>resolve this issue?<o:p></o:p></span></p><p><span style='font-family:"Arial",sans-serif'>Doc says:<br>To limit the usage of CAM by IPV6 hosts with unresolved ND, enter the ipv6 max-host-drop-cam <br>command.<o:p></o:p></span></p><p><span style='font-family:"Arial",sans-serif'>Jörg<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p><span style='font-family:"Arial",sans-serif'>On 16 Feb 2019, at 20:42, <a href="mailto:nick@ramnode.com">nick@ramnode.com</a> wrote:<o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid #777777 1.5pt;padding:0in 0in 0in 4.0pt;margin-left:0in;margin-right:0in;margin-bottom:3.75pt'><div id=0517BC2B-610D-477E-A1D7-1696C432704C><div><p style='margin:0in;margin-bottom:.0001pt'><span style='color:#777777'>Hello,<o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt'><span style='color:#777777'> <o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt'><span style='color:#777777'>We sometimes encounter neighbor cache exhaustion attacks on our network. A remote IP beings scanning large portions of our customer IPv6 ranges, the IPv6 neighbor table on our router (MLX/XMR) fills up with INCOMP status entries, and connectivity remains impacted until the neighbor table is manually cleared.<o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt'><span style='color:#777777'> <o:p></o:p></span></p><p style='margin:0in;margin-bottom:.0001pt'><span style='color:#777777'>What settings should we use to prevent the table from filling up with and maintaining so many INCOMP entries?<o:p></o:p></span></p><p style='background:white'><span style='font-size:9.0pt;font-family:"Calibri Light",sans-serif;color:#1F497D'>Regards,</span><span style='color:#777777'><o:p></o:p></span></p><p style='background:white'><span style='font-size:9.0pt;font-family:"Calibri Light",sans-serif;color:#1F497D'>Nick</span><span style='color:#777777'><o:p></o:p></span></p></div></div></blockquote><div><blockquote style='border:none;border-left:solid #777777 1.5pt;padding:0in 0in 0in 4.0pt;margin-left:0in;margin-right:0in;margin-bottom:3.75pt'><p><span style='font-family:"Arial",sans-serif;color:#777777'>_______________________________________________<br>foundry-nsp mailing list<br><a href="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a><br><a href="http://puck.nether.net/mailman/listinfo/foundry-nsp"><span style='color:#777777'>http://puck.nether.net/mailman/listinfo/foundry-nsp</span></a><o:p></o:p></span></p></blockquote></div></div></div></body></html>