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rohrers
New Contributor II

Two brand new 1531p with high CPU utilization when connected to a 1544f

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I have a 1544f switch that these two switches are plugging into with fiber directly to each location.

I have two new 1531P switches and I configured both at my desk and the worked fine and were responsive when I was plugged into Ethernet. When I took it onsite and plugged it into the sfp I was able to get the clients on the network, but when I got back to my desk I could not telnet or HTTP to the device. I switched out module, the fiber pair and even the port in our 1544f with no luck. I took it down and brought it back to the office. If I plug into another switch with the SFP port, I get normal CPU utilization. The second I plug it into the 1544f, I get high CPU utilization. Both the 1531p and the 1544f are on OS version R11.12.0. I thought it was software related on the 1531p so I took it back to factory firmware with some change. Now I can ping the device but REALLY bad response times (in the hundreds to thousands ms), but I the high CPU remains.

It's a pretty basic config and I've attached the config of one of the new switches as well as the cpu utilization. Any help would get great. Thanks!

0Idle0R93,440,000011211.1
1init0W3,160,000000
2kthreadd0W0000
3ksoftirqd/00W260,000000
4kworker/0:00W0000
5kworker/0:0H0W0000
6kworker/u:00W10,000000
7kworker/u:0H0W0000
8migration/099W0000
9khelper0W0000
10kdevtmpfs0W0000
11kworker/0:10W1,440,000000
12kworker/u:10W0000
129bdi-default0W0000
131kblockd0W0000
159rpciod0W0000
172kswapd00W0000
228nfsiod0W0000
241crypto0W0000
311kpsmoused0W0000
319spi10W0000
323mtdblock00W0000
328mtdblock10W0000
333mtdblock20W0000
338mtdblock30W0000
344mtdblock40W0000
349mtdblock50W0000
354mtdblock60W0000
359mtdblock70W0000
364mtdblock80W0000
369mtdblock90W0000
374mtdblock100W0000
379mtdblock110W0000
387deferwq0W0000
397rcS0W0000
400syslogd0W10,000000
402klogd0W10,000000
431ubi_bgt0d0W0000
436ubifs_bgt0_00W0000
442ubi_bgt1d0W10,000000
447ubifs_bgt1_00W0000
456S80Adtran0W0000
457adtran-start.sh0W20,000000
471bcm-swx0W4,300,000000
477bcmDPC0W0000
478bcmINTR90W63,900,000090.94
479socdmadesc.00W610,000000
485bcmL2X.00W99,330,0000565.51
486bcmCNTR.00R19,340,000090.94
487bcmTX0W1,390,000000
488bcmXGS3AsyncTX0W0000
489bcmLINK.00R12,220,000090.94
490bcm-swx0W0000
491bcm-swx0W27,700,000090.94
492bcm-swx0W0000
493BCMdiagService0W60,000000
497bcmRX0R51,100,000017717.16
508runstarter0W0000
511starter0W10,000000
513aos1W200,000000
516KCall44W3,570,000090.93
517PC Config8R47,100,000090.93
518PacketRouting40W97,500,0000282.26
519Timers42W20,100,000090.94
520FrontPanel39W1,390,000000
521RSTP39W0000
522con08W0000
523ICP Session9W0000
524RSTP39W960,000090.93
525RSTP-BG38W0000
526Thread Pool5W10,000000
529PC Config8W0000
530PC Config8R582,930,000041141.37
531bcm-swx0R387,590,000021521.19
532SwitchQ16W1,350,000000
533Stacking10W100,000000
534RouteTableTick7W140,000000
535RouteTableTick7W110,000000
536IP Events25W270,000000
537tcptimer23W920,000000
538tcpinp23W1,260,000000
539tcpout23W1,200,000000
540Igmp Reswitch7W40,000000
541DhcpSnooping31W0000
542DnsClient17W90,000000
543DnsProxy17W50,000000
544DnsTable17W10,000000
545WWW20W11,890,000000
546SnmpThread7R3,210,000000
547FTPServer List~6W10,000000
548SMTP Client17W0000
549SNTP Client20W10,000000
550CPU Usage9R74,130,0000373.34
551CLIInjectQ7W0000
555poe9W2,770,000000
556PwrOvrEth10W6,950,000000
557AUTOLINKQ5W0000
558HttpClientQ7W0000
559ActiveQueueDea~4W10,000000
561UDP In38W330,000000
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rohrers
New Contributor II

Re: Two brand new 1531p with high CPU utilization when connected to a 1544f

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FYI in case anyone else runs into this issue, I ended up calling support. While at first they couldn't pin point it, after sending some i nterface logs on the uplink port they were setting a heavy amount of  multicast traffic. We have a lot of IP cameras on the network so by enabling IGMP Snooping on the vlan interfaces, the switch calmed down. I'm not sure as we have 5 1534p and 2 1544f and neither of them  have IGMP snooping and performed fine. My guess is the 1531p has different hardware and can't handle the amount of traffic or the 1534 and 1544 while they don't have options for IGMP snooping, it's possible it's enabled just not configurable. Either way, I'm all fixed. Here was the command I ran at the configure terminal:

ip igmp snooping vlan 1-3

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rohrers
New Contributor II

Re: Two brand new 1531p with high CPU utilization when connected to a 1544f

Jump to solution

FYI in case anyone else runs into this issue, I ended up calling support. While at first they couldn't pin point it, after sending some i nterface logs on the uplink port they were setting a heavy amount of  multicast traffic. We have a lot of IP cameras on the network so by enabling IGMP Snooping on the vlan interfaces, the switch calmed down. I'm not sure as we have 5 1534p and 2 1544f and neither of them  have IGMP snooping and performed fine. My guess is the 1531p has different hardware and can't handle the amount of traffic or the 1534 and 1544 while they don't have options for IGMP snooping, it's possible it's enabled just not configurable. Either way, I'm all fixed. Here was the command I ran at the configure terminal:

ip igmp snooping vlan 1-3

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