m4300-28G-PoE+ High CPU Utilization

[joshduguid999]

Hello there.

Using a m4300-28G-PoE+ switch for Dante audio, as well as multicast Video over IP.

I'm seeing VERY high cpu usage, (averaging around 84%), and 50% or more of that is coming from "snooptask". Should I be worried? What happens if it spikes to 100%? What should I be looking for to troubleshoot this issue?

Thanks!
Josh D.

[Retired_Member]

Hi @joshduguid999 

Welcome to Community!

Don't worry, "snooptask" is the component to handle IGMP Snooping traffic, as your switch is using for Dante audio, as well as multicast Video over IP. There is a lot of mulcast that switch need to handle, so it's a normal case.

Regards,

EricZ

Netgear

[joshduguid999]

So no worries about the high CPU usage otherwise? Is 89%+ normal?

[Retired_Member]

Yes, don't worry.

Just please keep monitor for average CPU Utilization, and check if there is any interrupt for multicast video traffic.

[VistaICT]

We experienced the same on our stack of M4300 switches. snoopTask was consuming all the CPU.

To date we found firmware 12.0.4.7 has been the most reliable but every 30 days the CPU usage creeps up and we have to reboot the stack in oder to keep IGMP/Multicast working properly.

We've just upgraded to 12.0.7.17 and are having issues again.

I have cases open with support to diagnose the issues.

[joshduguid999]

Glad to hear I'm not the only one with issues. A switch sitting at 80%+ CPU seems really suspicious to me. Mine doesn't creep up however, it jumps right to 80%+ after reset.

What is odd is I have another site with M4300 switches (stack of three, one M4300-96X and two M4300-28G) with WAY more going on, and only 40% CPU utilization.

Let me know how things work out with support.

[Retired_Member]

@joshduguid999  @VistaICT 

Ok, for further analysis,Could you please provide the tech-support file of the Switch:
How do I send tech-support files from my Managed Switch to NETGEAR community moderators?

https://kb.netgear.com/31439/How-do-I-send-diagnostic-files-from-my-Managed-Switch-to-NETGEAR-commun...

Regards,

EricZ
NETGEAR employee

[VistaICT]

Get in touch with support as @Retired_Member mentioned. They are super helpful

[joshduguid999]

Hey @Retired_Member,

Here's the tech support file for you. Thanks for reaching out.

Josh D.

*************** show version ***************

Unrecognized command : show version

Error! Command 'show version' doesn't exist.
Hence aborting TechSupport execution.

*************** show running-config ***************

!Current Configuration:
!
!System Description "M4300-28G-PoE+ ProSAFE 24-port 1G PoE+ and 2-port 10GBASE-T and 2-port 10G SFP+, 12.0.6.6, B1.0.0.11"
!System Software Version "12.0.6.6"
!System Up Time "6 days 11 hrs 28 mins 34 secs"
!Additional Packages QOS,Multicast,IPv6,IPv6 Management,Stacking,Routing
!Current SNTP Synchronized Time: SNTP Client Mode Is Disabled
!
serviceport protocol none
serviceport ip 192.168.0.1 255.255.255.0 192.168.0.1
vlan database
set igmp groupmembership-interval 1 125
set igmp querier 1 address 192.168.41.1
vlan routing 1 1
exit
configure
no sntp client mode
stack
member 1 2
exit
no ip domain lookup
logging buffered 0
no ip routing
line console
exit
line telnet
exit
line ssh
exit
no spanning-tree
!
set igmp querier address 192.168.41.1
set igmp querier query-interval 60
classofservice trust ip-dscp
classofservice ip-dscp-mapping 34 5
classofservice ip-dscp-mapping 46 6
interface 1/0/1
description 'Remote Access PC'
exit
interface 1/0/2
description 'Screen Control'
exit
interface 1/0/3
description 'LivestreamRX Vid'
mtu 9000
exit
interface 1/0/4
description 'Proj Control'
exit
interface 1/0/5
description 'BackstageRX Dante'
exit
interface 1/0/6
description 'GreenroomRX Dante'
exit
interface 1/0/7
description 'LivestreamRX Dante'
exit
interface 1/0/8
description 'PodiumTX Vid'
mtu 9000
exit
interface 1/0/9
description 'Bottom Proj Control'
exit
interface 1/0/10
description 'SPARE 1'
exit
interface 1/0/11
description 'Top Proj Control'
exit
interface 1/0/12
description 'BackstageRX Vid'
mtu 9000
exit
interface 1/0/13
description 'GreenroomRX Vid'
mtu 9000
exit
interface 1/0/14
description 'CameraTX Vid'
mtu 9000
exit
interface 1/0/15
description 'ProjRX Vid'
mtu 9000
exit
interface 1/0/16
description 'Booth TSC-80'
exit
interface 1/0/17
description 'Theatre Core110f'
exit
interface 1/0/18
description 'SPARE 2'
mtu 9000
exit
interface 1/0/19
description 'Theatre Amp'
exit
interface 1/0/20
description 'BoothTX Vid'
mtu 9000
exit
interface 1/0/21
description 'SPARE 3'
exit
interface 1/0/22
description 'ProjRX Dante'
exit
interface vlan 1
routing
ip address 192.168.41.1 255.255.255.0
exit
ip management vlan 1 192.168.41.1 255.255.255.0
router rip
exit
router ospf
exit
ipv6 router ospf
exit
service dhcp
ip dhcp excluded-address 192.168.41.1 192.168.41.100
ip dhcp pool "AV"
lease infinite
network 192.168.41.0 255.255.255.0
netbios-node-type b-node
exit
no bonjour run
exit

*************** debug crash & kernel logs ***************

*************** Debug crashlog 0 unit 1 ********
Displaying FASTPATH Crash Dump 0
For kernel Crash Dump - osapiDebugCrashDumpDisplay(x,1)
Crash Dump 0 is not found

*************** Debug crashlog 1 unit 1 ********
Displaying FASTPATH Crash Dump 1
For kernel Crash Dump - osapiDebugCrashDumpDisplay(x,1)
Crash Dump 1 is not found

*************** Debug crashlog 2 unit 1 ********
Displaying FASTPATH Crash Dump 2
For kernel Crash Dump - osapiDebugCrashDumpDisplay(x,1)
Crash Dump 2 is not found

*************** Debug crashlog 3 unit 1 ********
Displaying FASTPATH Crash Dump 3
For kernel Crash Dump - osapiDebugCrashDumpDisplay(x,1)
Crash Dump 3 is not found

*************** Debug crashlog 4 unit 1 ********
Displaying FASTPATH Crash Dump 4
For kernel Crash Dump - osapiDebugCrashDumpDisplay(x,1)
Crash Dump 4 is not found

*************** Debug crashlog kernel 0 unit 1 ********

*************** Debug crashlog kernel 1 unit 1 ********

*************** Debug crashlog kernel 2 unit 1 ********

*************** Debug crashlog kernel 3 unit 1 ********

*************** Debug crashlog kernel 4 unit 1 ********

*************** Display stack-path information. ***************

Switch 2 does not exist!

Switch 3 does not exist!

Switch 4 does not exist!

Switch 5 does not exist!

Switch 6 does not exist!

Switch 7 does not exist!

Switch 8 does not exist!