<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//DE"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><TITLE></TITLE></HEAD><BODY><div style="font-family:arial,helvetica,sans-serif;font-size:10pt;"><p style="margin:0px;padding:0px;">Hi Justin,</p>
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<p style="margin:0px;padding:0px;">I had a similar issue some weeks ago on a FESX. TAC told me they have CPU issues with IPv6 Multicasts caused by intel network cards. See link below:</p>
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<p style="margin:0px;padding:0px;"><a href="https://communities.intel.com/message/220048#220048"><span style="mso-ansi-language: EN-US;" lang="EN-US">https://communities.intel.com/message/220048#220048</span></a></p>
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<p style="margin:0px;padding:0px;">Solution was to update the network card driver.</p>
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<p style="margin:0px;padding:0px;">Regards,</p>
<p style="margin:0px;padding:0px;">Frank</p>
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<td style="font-family: Arial; font-size: 11px;" colspan="2">-----Ursprüngliche Nachricht-----<br /> Von: "Justin Keery" [<a href="mailto:justin.keery@venus.co.uk">justin.keery@venus.co.uk</a>]<br /> Gesendet: Mi. 19.11.2014 11:03<br /> An: "foundry-nsp@puck.nether.net" [<a href="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a>]<br /> Betreff: [f-nsp] ANY IDEAS - IP6 multicast traffic causing severe CPU load issue (on ICX)<br /><br /></td>
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<div dir="ltr"><br />Hi folks, any ideas about this?<br /><br />The switches affected by this include ICX6540, 6610 and 6650 all of which were involved in transporting the VLAN described below.<br /><br />IP6 multcast traffic (less than 20Mbit/sec, discovered with wireshark on a mirror port) on VLAN682 was causing >40% CPU load on all switches where this VLAN was configured, even though there is no IP virtual interface in this VLAN. At one point there was a brief but serious OSPF failure whilst this condition was present. <br /><br />With the ingress port shut down the CPU load returned to 1%.<br /><br />We tried to disable IP4 and IP6 igmp / mld snooping, this had no effect. We then added a router-interface so we could add an IP6 ACL to filter *all* IP6 traffic - again no effect<br /><br />vlan 682 name KARMARAMA_L2_ONEA809159_682 by port<br /> tagged ethe 1/2/1 to 1/2/3<br /> router-interface ve 682<span style="color: #ff0000;"> <- added later so we could implement an ACL</span><br /> multicast disable-igmp-snoop <span style="color: #ff0000;"><- did not help</span><br /> multicast6 disable-mld-snoop <span style="color: #ff0000;"><- did not help</span><br />
<div><strong>We need a way to make sure that IP6 multicasts on a VLAN won't overload the CPU on any switch with that VLAN present - ideally filter that VLAN from the CPU altogether!</strong></div>
<div>Any ideas?</div>
<div>Thanks</div>
<div>Justin</div>
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<p style="margin:0px;padding:0px;"><span style="font-family: Arial; font-size: 11px;">-----Ursprüngliche Nachricht Ende-----</span></p></div><br><br>---<br><div style="font-family:arial;font-size:10pt;">Alle Postfächer an einem Ort. Jetzt wechseln und E-Mail-Adresse mitnehmen! <a style="font-family:arial;font-size:10pt;" href="http://email.freenet.de/basic/Informationen" target="_blank">Rundum glücklich mit freenetMail</a></div>
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