Hi Clarke, 100 pps should not be a big thing. Have you configured IGMP snooping?
Regards, Venkatesh On Wed, Nov 13, 2013 at 10:30 PM, <[email protected]>wrote: > [image: Boxbe] <https://www.boxbe.com/overview> > [email protected] is not on your Guest > List<https://www.boxbe.com/approved-list?tc_serial=15658474272&tc_rand=2009934254&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&token=A0Np1I6Z6K5dcT5G%2BnShTxWU2IO6JMOCBTgGipBQvMAsAkvjnw%2BCy85AIjNcHJ7G&key=Dkun%2FGqZnRcYVDmrYgQp1DDbKeg6LOWTRVtxZt%2FHA0Y%3D>| > Approve > sender<https://www.boxbe.com/anno?tc_serial=15658474272&tc_rand=2009934254&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&token=A0Np1I6Z6K5dcT5G%2BnShTxWU2IO6JMOCBTgGipBQvMAsAkvjnw%2BCy85AIjNcHJ7G&key=Dkun%2FGqZnRcYVDmrYgQp1DDbKeg6LOWTRVtxZt%2FHA0Y%3D>| > Approve > domain<https://www.boxbe.com/anno?tc_serial=15658474272&tc_rand=2009934254&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&dom&token=A0Np1I6Z6K5dcT5G%2BnShTxWU2IO6JMOCBTgGipBQvMAsAkvjnw%2BCy85AIjNcHJ7G&key=Dkun%2FGqZnRcYVDmrYgQp1DDbKeg6LOWTRVtxZt%2FHA0Y%3D> > > Send juniper-nsp mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://puck.nether.net/mailman/listinfo/juniper-nsp > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of juniper-nsp digest..." > > > Today's Topics: > > 1. EX cpu performance under multicast replication load? > (Clarke Morledge) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 13 Nov 2013 11:33:57 -0500 (EST) > From: Clarke Morledge <[email protected]> > To: [email protected] > Subject: [j-nsp] EX cpu performance under multicast replication load? > Message-ID: <[email protected]> > Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII > > I am seeing some bothersome CPU performance issues on EX switches, mostly > on the less powerful units like the 2200s, when it comes to handling > multicast. > > In practical situations, I do not see much multicast traffic in general, > except on our campus we do get a lot of Apple Bonjour traffic related to > Multicast DNS. Sometimes, a single host will go a little bonkers with > repeated MDNS packets. In one case, I have seen where a flood of about > 100 multicast packets per second, related to Bonjour, will cause the CPU > on the lower end EX switches to spike up dramatically, resulting in loss > of management of the switch during peak loads. For example, the switch > will stop handling ICMP echo requests to its management IP, or it will > miss RADIUS packets. > > Can someone walk me through the EX architecture a bit to tell me if this > is expected behavior? I am assuming the EX CPU is actually handling the > multicast replication of Ethernet frames received to be sent out other > ports, but it seems like 100 packets per second should not be a big deal > to worry over. So something looks awry. > > Oddly enough, I do not see any performance issues when straight-up > broadcast traffic hits these kind of packet rates. > > To mitigate against this, I guess I could use QoS to prioritize management > frames over user multicast data, but if the issue is about packet > replication and not forwarding, I am entirely convinced that the standard > marking and handling QoS parameters would be effective. > > Any ideas? > > Clarke Morledge > College of William and Mary > Information Technology - Network Engineering > Jones Hall (Room 18) > Williamsburg VA 23187 > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > juniper-nsp mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp > > ------------------------------ > > End of juniper-nsp Digest, Vol 132, Issue 17 > ******************************************** > > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
