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

[rohrers]

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!

0	Idle	0	R	93,440,000	0	112	11.1
1	init	0	W	3,160,000	0	0	0
2	kthreadd	0	W	0	0	0	0
3	ksoftirqd/0	0	W	260,000	0	0	0
4	kworker/0:0	0	W	0	0	0	0
5	kworker/0:0H	0	W	0	0	0	0
6	kworker/u:0	0	W	10,000	0	0	0
7	kworker/u:0H	0	W	0	0	0	0
8	migration/0	99	W	0	0	0	0
9	khelper	0	W	0	0	0	0
10	kdevtmpfs	0	W	0	0	0	0
11	kworker/0:1	0	W	1,440,000	0	0	0
12	kworker/u:1	0	W	0	0	0	0
129	bdi-default	0	W	0	0	0	0
131	kblockd	0	W	0	0	0	0
159	rpciod	0	W	0	0	0	0
172	kswapd0	0	W	0	0	0	0
228	nfsiod	0	W	0	0	0	0
241	crypto	0	W	0	0	0	0
311	kpsmoused	0	W	0	0	0	0
319	spi1	0	W	0	0	0	0
323	mtdblock0	0	W	0	0	0	0
328	mtdblock1	0	W	0	0	0	0
333	mtdblock2	0	W	0	0	0	0
338	mtdblock3	0	W	0	0	0	0
344	mtdblock4	0	W	0	0	0	0
349	mtdblock5	0	W	0	0	0	0
354	mtdblock6	0	W	0	0	0	0
359	mtdblock7	0	W	0	0	0	0
364	mtdblock8	0	W	0	0	0	0
369	mtdblock9	0	W	0	0	0	0
374	mtdblock10	0	W	0	0	0	0
379	mtdblock11	0	W	0	0	0	0
387	deferwq	0	W	0	0	0	0
397	rcS	0	W	0	0	0	0
400	syslogd	0	W	10,000	0	0	0
402	klogd	0	W	10,000	0	0	0
431	ubi_bgt0d	0	W	0	0	0	0
436	ubifs_bgt0_0	0	W	0	0	0	0
442	ubi_bgt1d	0	W	10,000	0	0	0
447	ubifs_bgt1_0	0	W	0	0	0	0
456	S80Adtran	0	W	0	0	0	0
457	adtran-start.sh	0	W	20,000	0	0	0
471	bcm-swx	0	W	4,300,000	0	0	0
477	bcmDPC	0	W	0	0	0	0
478	bcmINTR	90	W	63,900,000	0	9	0.94
479	socdmadesc.0	0	W	610,000	0	0	0
485	bcmL2X.0	0	W	99,330,000	0	56	5.51
486	bcmCNTR.0	0	R	19,340,000	0	9	0.94
487	bcmTX	0	W	1,390,000	0	0	0
488	bcmXGS3AsyncTX	0	W	0	0	0	0
489	bcmLINK.0	0	R	12,220,000	0	9	0.94
490	bcm-swx	0	W	0	0	0	0
491	bcm-swx	0	W	27,700,000	0	9	0.94
492	bcm-swx	0	W	0	0	0	0
493	BCMdiagService	0	W	60,000	0	0	0
497	bcmRX	0	R	51,100,000	0	177	17.16
508	runstarter	0	W	0	0	0	0
511	starter	0	W	10,000	0	0	0
513	aos	1	W	200,000	0	0	0
516	KCall	44	W	3,570,000	0	9	0.93
517	PC Config	8	R	47,100,000	0	9	0.93
518	PacketRouting	40	W	97,500,000	0	28	2.26
519	Timers	42	W	20,100,000	0	9	0.94
520	FrontPanel	39	W	1,390,000	0	0	0
521	RSTP	39	W	0	0	0	0
522	con0	8	W	0	0	0	0
523	ICP Session	9	W	0	0	0	0
524	RSTP	39	W	960,000	0	9	0.93
525	RSTP-BG	38	W	0	0	0	0
526	Thread Pool	5	W	10,000	0	0	0
529	PC Config	8	W	0	0	0	0
530	PC Config	8	R	582,930,000	0	411	41.37
531	bcm-swx	0	R	387,590,000	0	215	21.19
532	SwitchQ	16	W	1,350,000	0	0	0
533	Stacking	10	W	100,000	0	0	0
534	RouteTableTick	7	W	140,000	0	0	0
535	RouteTableTick	7	W	110,000	0	0	0
536	IP Events	25	W	270,000	0	0	0
537	tcptimer	23	W	920,000	0	0	0
538	tcpinp	23	W	1,260,000	0	0	0
539	tcpout	23	W	1,200,000	0	0	0
540	Igmp Reswitch	7	W	40,000	0	0	0
541	DhcpSnooping	31	W	0	0	0	0
542	DnsClient	17	W	90,000	0	0	0
543	DnsProxy	17	W	50,000	0	0	0
544	DnsTable	17	W	10,000	0	0	0
545	WWW	20	W	11,890,000	0	0	0
546	SnmpThread	7	R	3,210,000	0	0	0
547	FTPServer List~	6	W	10,000	0	0	0
548	SMTP Client	17	W	0	0	0	0
549	SNTP Client	20	W	10,000	0	0	0
550	CPU Usage	9	R	74,130,000	0	37	3.34
551	CLIInjectQ	7	W	0	0	0	0
555	poe	9	W	2,770,000	0	0	0
556	PwrOvrEth	10	W	6,950,000	0	0	0
557	AUTOLINKQ	5	W	0	0	0	0
558	HttpClientQ	7	W	0	0	0	0
559	ActiveQueueDea~	4	W	10,000	0	0	0
561	UDP In	38	W	330,000	0	0	0

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[rohrers · Accepted 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