Cisco WAN :: High CPU (99%) Utilization Of 4507 Switch

Dec 21, 2011

I am facing lots of issue with cisco 4507 switch recently.. Every alternate day, its CPU is getting utilized by 99% and network stopped working..finally it has to be restared.
Below is the CPU utilization of the process:-
------------------ show process cpu ------------------
CPU utilization for five seconds: 99%/0%; one minute: 99%; five minutes: 99%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process


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Cisco Switching/Routing :: Catalyst 4507-R Running 15.1.2 - High CPU Utilization

Feb 11, 2013

we have 2 catalyst 4507 Switches (Catalyst 4507-R running 15.1.2.release) configured in VRRP and vlans are distributed across both the switches.For few vlans core1 is master and for remaining vlans core2 is master.Both cores showing different CPU utilization.when we did our troubleshooting,we realized that the server vlan on core1 (Core1 is master for this vlan) is creating high utilization.when we switched this server vlan to core2 the core1 utilization came down and core2 utilization increased.we identified that server vlan is culprit in this issue.  i would like to know weather any method is available in core switch wherein i can check which server in this vlan is contributing for this utilization.(To identify the server which contribute this utilization,we can actually shut 1 server each at time to see weather utilization is going down.with this kind of testing ideally we should be able to identify the server but this will disturb the server environment which we don't want in live environment)  

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Cisco Switching/Routing :: Switch 4507 Having High Latency / CPU

Aug 19, 2012

We are facing issue of high Latency and slowness with Switch Cisco 4507R at the Customer logging for the Switch and if there is any IOS related issue [BUG] or some other finding for this case.

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Cisco WAN :: High CPU Utilization In 4506 Switch?

Sep 6, 2011

I am getting High CPU utilization in one of my switch which has many layer 3 vlan interface and many other routing interface.In the o/p of show process cpu i get 64 % CPU utilization. The o/p is as below
PID Runtime(ms) Invoked    uSecs    5Sec    1Min       5Min    TTY  Process
30 37656252881151776906     3269     62.31%   63.95%   64.82%    0     Mgmt LoPri

And rest of the other process are very normal. Only cat4k Mgmt LoPri is consuming very high cpu utilization. I have checked all the interface input queue and all are very normal.

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Cisco WAN :: High CPU Utilization On 3560 Switch

Oct 6, 2009

We are facing a weird problem of high CPU utilization on 3560 switch. Even without connecting  a single PC to switch, CPU utilization is showing 22 %. Any particular reason for this? Can configuration affect the CPU utilization even though there is no PC connected?

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Cisco Switching/Routing :: High CPU Utilization In 3750 Switch

Oct 19, 2012

In Cisco 3750 facing high CPU utilization for specific period. During this period traffic response times across the switch degrades. Steps to identify interface potentially generating traffic. I have attached 'sh proc cpu history' , ' sh ip traffic', 'sh proc cpu sorted'  during troubled period .

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Cisco Switching/Routing :: High CPU Utilization On Switch 2960?

Feb 16, 2012

I am a new network engineer on a retail company and I am having a problem on the High utilization of my 3-stack switch 2960 only during Peak Hours of the Store Sales.
Note: on Peak hours, it is peaking at 90-95 %
here is the utilization after Peak hours:


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Cisco Switching/Routing :: High CPU Utilization On 4006 Switch CAT OS?

Sep 5, 2012

I have been facing High CPU Utilization issue with few of my Cisco 4006 Switches together from last one month. Out of which 1 switch issue sorted out auto after 2 days however the problem is still exists with rest 3 switches.They are 6-7 year old and having one SUP engine and other are switch port modules.

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Cisco Switching/Routing :: EWA14 - High CPU Utilization In Core Switch

Dec 20, 2011

I am experiencing high cpu utilization in my 4000 series core switch.
I checked the loggs. i saw some strange loggs.
Please see the below logs:


What is the "invalidsourceaddresspacket" ?
Is this is due to some virus attack or something?? Also one more thing this switch is the Active router in HSRP.

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Cisco Switching/Routing :: High Utilization On 3750x Switch Stack?

Feb 25, 2013

i am seeing very high utilization on a random basis on the stack. and the logs indicate me that there is a pattern where there is a stack power cable shows inserted (which was never unplugged) followed by sudden spike in the utilization.
001018: *Mar  6 16:21:22.138: %PLATFORM_STACKPOWER-6-CABLE_EVENT: Switch 4 stack power cable 1 inserted
001019: *Mar  6 18:18:37.982: %SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU


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Cisco Switching/Routing :: Very High CPU Utilization Core Switch 4503?

Feb 14, 2012

We  had a core switch(30 vlans) in our environment and it's noticed that  CPU utilization of the core switch is showing high during recent days. I  have checked logs and processes, but couldn't find the root cause. The  issue found only in the office hourly only(after that the cpu  utilization is idle and normal). I have already referred the following  link to troubleshoot the issue " [URL]
see the following outputs from the core switch
CPU utilization for five seconds: 99%/0%; one minute: 99%; five minutes: 99%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
  30   6687557041432420936        466 47.52% 47.10% 45.98%   0 Cat4k Mgmt LoPri
  55  30667074884269560256          0 45.36% 45.50% 45.85%   0 IP Input
  29  28552856922870089254          0  3.59%  3.50%  3.57%   0 Cat4k Mgmt HiPri

Note: Each Invalid source mac entry in each day from same port (above is the output after clearing logs before 3 days)
My queries regarding the issues are following
1) How can we find root cause regarding the high cpu utilization?

2) Is a single invalid mac address makes the cpu highly utilized for suppressing it?

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Cisco Switching/Routing :: High CPU Utilization On 4510R Switch With Dual SUP V -10G

Feb 14, 2012

We have a problem of igh CPU Utilization in Cisco 4510R-with dual SUP V-10G modules.
Cisco 4510R switch is the CORE switch and have 30 no's of VLans. It was running PVST/PVST+ previously. But Now we have migrated to MST. But after upgradation the CPU utilization reached alomst 98%.

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Cisco Switching/Routing :: ME3400 Switch High CPU Utilization Due To ARP Input

Sep 3, 2012

We have Cisco ME3400 switch, with configuration described below.
GE0/1 port is uplink:
interface GigabitEthernet0/1
description ***MATED-IUB_C&U-Plan***
port-type nni
switchport trunk allowed vlan 331,450,4085
switchport mode trunk
GEo/2 is configured as below:

interface GigabitEthernet0/2
description ***From NIB***
port-type nni
switchport access vlan 4085
We have also tried Loopguard feature enabled on all ports: but after some period same problem is repeated.
version information is below:
Cisco IOS Software, ME340x Software (ME340x-METROIPACCESSK9-M), Version 12.2(25)SEG3, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 25-Jul-07 22:56 by amvarma

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Cisco Switching/Routing :: 2960 - Switch Port High Utilization

Aug 16, 2012

In my network we use all cisco 2960 switches, problem is when someone copying  4gb data or high from one switch to another switch, by that time rto (Request time out) is coming.

1. when user 1 copy data from server ,at that time who is in switch2 behind like user2 ,he is getting problem like when ping to default-gateway,or rto is coming and network is very slow .
2. when i open sw2,sw1,sw3,trunk ports utilization is very high except sw4 to sw1 trunk ports,who behind sw4 like user4 ,he is not getting problem.
3.all switches trunkport in my network is faster ethernet and i have no option to connect trunkport to gigaehternet and ethernet channel.

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Cisco Switching/Routing :: C2960-24-TT-L - Switch Memory Utilization High After Upgrading IOS

Nov 8, 2011

I upgraded the newest IOS 15.0(1)SE for our SW C2960-24-TT-L, the process was succeseful. However, we found SW memory utilization raised to 82% this morning in normal situation. (Momery: Total 21341260, Used17471692) Did you guys meet the same problem after upgrading to 15.0(1)SE? I also would like to know what the normal memory utilization is? and what is the impact of memory utilization highly?

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Cisco Switching/Routing :: High Memory Utilization Of 3560 Switch After Upgrade IOS

Mar 5, 2013

I upgrade the IOS of my switch 3560 from   C3560-IPBASE-M), Version 12.2(25)SEB4,  To   C3560-IPBASEK9-M), Version 12.2(55)SE5 after that the utilizatio of the memory increase to 80% I attached the output of show memory statistics history

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Cisco Switching/Routing :: WS-C3750G-24TS-S1U High CPU Utilization In 3750 Switch Stack

Jan 30, 2012

WS-C3750G-24TS-S1U switch stack with high CPU utilization. 3 switches are stacked and using PBR on that. I am attaching the show cpu process as an attachment.The current template is "desktop routing" template.The selected template optimizes the resources in the switch to support this level of features for 8 routed interfaces and 1024 VLANs. [code]

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Cisco :: LMS 4.0.1 - High Memory Utilization

Oct 12, 2011

What causes LMS 4.1 to have high memory utilization?

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Cisco WAN :: High CPU Utilization On 7606?

Sep 28, 2012

Our Router  7606 is in a problem with high CPU Utilization. We are using one EBGP  and one IBGP session. We are also running OSPF with area 0 between two  IBGP router to exchange few local networks. When bandwidth cross 100 MB  than only CPU use become 100%. when bandwidth consumption is 80MB CPU  use become 80% end so on.

Out put is when bandwidth consumption is 34MB
CPU utilization for five seconds: 44%/43%; one minute: 42%; five minutes: 30%
PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
  78          44        9625          4  0.39%  0.03%  0.00%   2 Virtual Exec
  13          40         375        106  0.07%  0.00%  0.00%   0 ARP Input
  30         116        1098        105  0.07%  0.01%  0.00%   0 IPC Seat Manager


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Cisco :: High CPU Utilization On 7609-S?

Aug 10, 2011

I have a hight CPU utilisation problem in my CISCO7609-S routers. the cpu utilisation can rise 99% et this is usually. In the moment of hight CPU the the process CPU give the following:

the show processe cpu history give: show version

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Cisco WAN :: 2811 High Cpu Utilization

Apr 29, 2013

I have a 2811 that is really hitting the CPU hard.  Nothing shows on CPU processes.  It has an IPsec VPN tunnel back to HQ which also has a 2811 that terminates the VPN.  The HQ has 2-3 IPsec tunnels to other remote sites.  The CPU at the HQ avg 50% utilization during business hrs, peaks at about 80%.  The remote one is very high 95% peaks, avg 80%-95% during business hours with bandwidth utilization of only 10-20Mbps.  I read somewhere that its possible that fragmentation could be causing this.  My question is, if I set the MTU to 1450 on the remote, I am guessing I will need to do all the other routers as well, the HQ and other remote sites?  Siince they use the same outside interface to my HQ, is that correct?

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Cisco WAN :: CPU Utilization High In 2811

Jun 23, 2011

We have Cisco 2811 router and facing high CPU utilisation as 70%/67%;,IOS Runing :c2800nm-advsecurityk9-mz.124-3f.bin.

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Cisco WAN :: High CPU Utilization On 7206VXR

Jan 7, 2013

High cpu utilization on cisco 7206 vxr router.[code]                                    

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Cisco WAN :: High CPU Utilization On 7206VXR (NPE-G1)

Jun 20, 2012

I am observing very high CPU utilization on my Cisco 7206VXR (NPE-G1) Router. We have done all the necessary troubleshooting but not able to identify root cause. [code]

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Cisco :: Prime 4.2 - High CPU Utilization

Dec 4, 2012

I am running Cisco Prime 4.2(UNIX version) on a VM. CPU utilization will run between 90 and 100% constantly. Reloading the server will stabilize the CPU for a short period of time, however the CPU usage will always return to 90-100% utilization. Currently I have about 130 devices added to the system.

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Cisco WAN :: C4507R High CPU Utilization

Jun 12, 2013

we have 2 Cisco C4507 Switches working As Core Layer, but the CPU Utilization is about 54% most of the time and sometimes it goes up to 70% or 80% also.
which services are causing this utilization. [code]

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Cisco WAN :: 4510R+E High CPU Utilization

Dec 12, 2011

we have cisco 4510+R switch with Cisco IOS-XE software & we are facing high cpu utilization on core 1 (95%) & on core 0 (15%) since last 2 hours.
I have taken logg file but did not understand how to analyzed it & where is problem. log file is attached.

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Getting High Bandwidth Utilization

Sep 18, 2011

I am working as net admin which is i need to monitoring and manage my workplace network( education center )I got a few question about network traffic flow. Here is the issued.I got high bandwidth utilization so high after office hours which is only on night. as we know, after office hours there is no person at the office but the traffic flow on bandwidth utilization is high.what are the possibilities of this issued?

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Cisco :: 7613 Having Frequent High CPU Utilization?

Apr 25, 2012

I have Cisco 7613 on my edge(MPLS Backbone). CPU utilization is shooting to 100% at frequent intervals. When I tell vendors managing device they tell that it is happening due to one of my server(connected on Fast ethernet port of 100Mbps) generating heavy traffic. My questions are:

1. Can a router of 720Gbps capability be choked due to traffic generated by 100Mbps link?

2. Interrupt CPU process utilization is well below 10% at the said time. BGP router process consumes most of the CPU. Does this means that server in question is generating too many routing updates?

3. Is there any way that I can limit routing updates on a particular link?

4. how to check which link is causing more CPU utilization.

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Cisco WAN :: High CPU Utilization On 7200-VXR With NPEG2

Nov 30, 2012

My router is running with BGP (One eBGP and One IBGP session). I have filterdown the BGP roting table by using prefix-List and default route to upstream router.But still found the CPU process is high (80%/80% with 60MB traffic).
Sh Proc CPU
CPU utilization for five seconds: 88%/88%; one minute: 87%; five minutes: 87%
PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process


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Cisco Firewall :: High CPU Utilization On ASA 5550?

Mar 10, 2013

I have Active Standby ASA5550 setup with VPN premium license. A few days back we had a requirement of SSL VPN connection for and we got a temporary from Cisco for same, this license expired and the ASA reverted to it's original license. 3 4 days after this we saw a sudden increase in CPU utilization (upto 90% + -5%) on the ASA during production hours but were not able to figure out the reason, in order to restore the services we failovered the firewall to secondary and everything worked fine. We were suspecting one of the following but there were no logs for any of this
1. The ASA hardware was haivng problem

2. Some client was doing a DoS attack to bring down the ASA (no logs for this as well).
We took a downtime to look further by failovering the ASA back to primary and it worked fine without any issues ruling out the 1st option. We also came across a licesing doc [URL]
Downgrading any license (for example, going from 10 contexts to 2 contexts).
# Note If  a temporary license expires, and the permanent license is a downgrade,  then you do not need to immediately reload the security appliance; the  next time you reload, the permanent license is restored.
As per this doc, sooner or later a restart was required on the ASA. We restarted secondary ASA and everthing was fine but when we restarted the primary ASA by swtiching over to secondary some of the server (not all) in the DMZ stopped working (even ICMP unreachable) and only came back to normal when the primary ASA was restored and working fine (with failover).
The reboot was done by shuting down the physical link between the Core switch and ASA inside individually.
I am not sure what could be the issue that the servers in the DMZ wen unreachable.

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Cisco :: High CPU Utilization 7603 WS-SUP32

Dec 20, 2010

Since a couple of months, I have some CPU problem.
There is no high process :
l#sh processes cpu | exclude 0.00CPU utilization for five seconds: 39%/30%; one minute: 32%; five minutes: 32% PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process 130    52713208 240359987        219  0.95%  0.91%  1.00%   0 IP Input         202     1811824   1218190       1487  0.07%  0.06%  0.05%   0 HIDDEN VLAN Proc 338    20873364    219225      95214  7.11%  0.94%  0.71%   0 BGP Scanner  
total amount of traffic on the router around  700Mb-1Gb out /  300Mb In
cisco CISCO7603 (R7000) processor (revision 1.1) with 458752K/65536K bytes of memory.Processor board ID FOX090308DTR7000 CPU at 300Mhz, Implementation 0x27, Rev 3.3, 256KB L2, 1024KB L3 CacheLast reset from power-on5 Virtual Ethernet interfaces9 Gigabit Ethernet interfaces1915K bytes of non-volatile configuration memory.
65536K bytes of Flash internal SIMM (Sector size 512K)

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Cisco WAN :: High CPU Utilization In GGSN (7604 Ios 12.4)

Jul 26, 2011

We have a CISCO 7604 Router (GGSN) in our customer site. Since two weeks are observing high CPU utilization (even touching 100 percent). We performed a SNMP configuration on this routers 2 weeks back as well. But SNMP process is not consuming much CPU resources.  The following is the output of the "show proc cpu" and "show proc cpu history.
------------------ show process cpu ------------------ 
CPU utilization for five seconds: 50%/15%; one minute: 49%; five minutes: 51%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process


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