Very High CPU Utilization on NV3120

[ctsjgregory]

Hello Everyone,

I have a customer that is complaining of terribly slow speeds to the net and upon logging in, the NV3120 is really struggling.

Here is the CPU table as of 5 minutes ago (this is pretty consistent as far as the percentages go):

1	Idle	0	W	328,260	1,004	0	0
3	PC Config	7	S	99,139	932	0	0
4	PacketRouting	39	W	669,200	487	954,192	95.86
5	Timer	41	W	170,291	40	3,155	0.32
6	Thread Pool	4	W	170	60	0	0
7	Timer-00	10	W	413,590	10	0	0
8	Nm01	5	W	0	1,149,540	0	0
9	FrontPanel	38	W	10,684	357	0	0
10	con0	41	W	1	9	0	0
11	ICP Session	8	W	165	89	0	0
12	RSTP	38	W	11,017	171	0	0
13	RSTP-BG	37	W	10	487	0	0
14	RouteTableTick	6	R	1,316	13	0	0
15	OSPF	6	R	1,085	264	0	0
16	IGMPTick	6	R	969	116	0	0
17	IGMP-Receiver	6	W	0	541,647	0	0
18	IP Events	24	W	2,630	342	0	0
19	tcptimer	22	W	3,232	38	0	0
20	tcpinp	22	W	3,118	1,400	0	0
21	tcpout	22	W	9,403	182	0	0
22	DnsClient	16	W	685	77	0	0
23	DnsProxy	16	W	303	155	0	0
24	DnsTable	16	W	275	35	0	0
25	WWW	19	W	18,120	4,365	0	0
26	SnmpThread	6	R	15,096	40	0	0
27	Switch Management	38	W	0	316	0	0
28	Switch Maintenance	4	R	10,921	990	0	0
29	BCM	41	W	330,634	68	22,013	2.2
30	RSTP	38	W	0	544	0	0
32	eth 0/1	41	W	301,514	68	13,919	1.13
33	IKE	6	W	1,908	669	0	0
34	IPSecKeyGen	4	W	0	170,186	0	0
35	SCEP	6	W	1	277	0	0
36	MediaConnectionQueue	34	W	1,285	1,269	0	0
37	FTPServer Listener	5	W	1	729	0	0
38	SMTP Client	16	W	0	366	0	0
39	SNTP Client	19	W	0	710	0	0
40	CLIInjectQ	6	W	0	41,779	0	0
42	FactoryDefault	4	R	576	21	0	0
44	RipOut	6	R	900	24	0	0
45	RipIn	6	W	1	273	0	0
46	UDP Relay	19	W	1	298	0	0
47	DHCP Server	29	W	270	1,041	0	0
49	AUTOLINKQ	4	W	15	81	0	0
50	HttpClientQ	6	W	0	287	0	0
51	UDP In	37	W	384	373	0	0
52	Flow Meter Logging	17	W	446	184	0	0
53	TWAMP-Control	6	W	0	131,735	0	0
54	TWAMP-Test	16	W	2	44	0	0

Refreshing...

Obviously packet routing is the main culprit here. I have verified that all integrated traffic monitoring is turned off (no ip ffe on each interface) and the only other somewhat taxing thing this NV3120 is doing is VPN.

Is this router just this severely underpowered?

[Anonymous · Accepted solution]

The 3120 is meant to be a SOHO type device and is generally not recommended for bandwidths in excess of 15Mbps (aggregate, up and down) for general traffic and it's VPN performance is roughly 1Mbps. Depending on how the unit is configured for other services (QoS, Traffic Shaping, etc), performance could be affected as well.  If you have the unit connected to a high-bandwidth link and trying to do VPN, QoS, Traffic Shaping, etc, the unit will do it's best to keep up but eventually it will have trouble.