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 :: 2811 Shows High CPU Utilization

Sep 24, 2012

I have a router 2811 and shows high CPU utilization 90%, it is observed that this happens when the traffic increases, the router also has firewall enabled services, QoS, DHCP, ACLs, NAT. As my router could not determine what is appropriate for my use, and how it could choose a router that meets my needs.

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Cisco WAN :: High CPU Utilization On 2811 Router

May 9, 2011

there is no logging in the access-list (there is only one inbound access list).Using QoS or not, doesn't seem to make a differenceAll route-caching features are ON. (CEF, Flow, Policy, Fast)Yet the minimum CPU utilisation I have seen is 25%/25%... On average it's 40% during the day, but once traffic picks up to around 6000 packets per second, the router is gone...I have a 50/50 Mbps connection, but I can use only 6 for VoIP ?
Show interfaces:
GigabitEthernet0/0 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 0014.1c26.7c30 (bia 0014.1c26.7c30)
  Description: $ETH-LAN$$FW_INSIDE$
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 6/255, rxload 7/255


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Cisco WAN :: 2811 - High CPU Utilization While Heavy Traffic?

Oct 24, 2012

We are having issues with our Cisco 2811 when there a lot of traffic on the device. Usually the router is down around 5%-10%. Total traffic might be around 2.0 MB. This is a router we are using at a remote campus. We do HD video conferencing every friday. We have a 10 MB internet connection that has our VPN connection to the main campus on it. While doing these VTC, the totall traffic is about 6 MB. The CPU Utilization then rises to approx 75% cause call issues and loss of sound. With another test with no one using the connection for anything else the utilization went up to 35%. The router has 128 MB Ram in it. Does the router need more RAM or do we need a larger internet pipe.

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Cisco Switching/Routing :: 2811 / Reduce The High CPU Utilization?

Feb 23, 2013

we have 2811 router with multiple servers connected to it's lan from which there are monitoring servers in between , the router suffers always from high cpu utilization
configuration has alot of ACLs & NAT & IPSEC Tunnel with wan bandwidth 20 M? Is there any method to reduce the high CPU utilization shown below !!
CPU utilization for five seconds: 90%/80%; one minute: 93%; five minutes: 90%
PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
104   737029848   427864243       1722  5.45%  5.65%  5.65%   0 IP Input       
253    63392216    11081854       5720  1.04%  1.15%  1.12%   0 IP NAT Ager     
260    82602372   137425723        601  0.64%  0.64%  0.66%   0 PDU DISPATCHER 


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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 :: 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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Cisco WAN :: High CPU Utilization On 7206VXR Due To Traffic?

Apr 19, 2011

I have a 7206VXR router doing policy routing with CEF enabled on all interfaces, no Cache Misses, Align Errors or failed buffers. CPU peaks up to 80% every two or three minutes. I suspect it is traffic related as I have a standby box and when it becomes the active on in the HSRP pair to high CPU load and LAN interface input errors follows it. see various show command output below. The router has a NPE-G1 and I'm using a gigabit port off of this on the LAn side and a E3 Frame Relay interface on the WAN side.
UK-DHC-Policy1#show buffersBuffer elements:     1118 in free list (1000 max allowed)     3539658545 hits, 0 misses, 1119 created
Public buffer pools:Small buffers, 104 bytes (total 50, permanent 50, peak 229 @


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Cisco Firewall :: High CPU Utilization On ASA 5540

May 11, 2008

I have a remote site customer with a Cisco ASA 5540 running SSLVPN (Anyconnect)(8.03). It currently only serves about 450 SSLVPN clients. Since last friday, they've seen the CPU utilization go up to high 90% while only serving 400+ remote users. I saw some high cpu utilization bugs, but none looked to be relevant. How I can find the root cause of the CPU high utilization?

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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 Firewall :: High CPU Utilization - ASA 5520

Dec 22, 2012

we have ASA 5520 with IOS 8.0 , when i am trying to add more static routes on the inside interface the CPU utilization is going up. one faced the same issue. I am configuring through the cisco ASDM 6.1(3)f.

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Cisco Firewall :: High Cpu Utilization On Pix 515E?

Aug 9, 2012

I am facing high CPU util on my pix 515 E which is in failover mode.During peak hours the util is see rising to 60% where as in off peak hours it is normally12%.
During normal operation the average utilisation was observed to be 30% but suddenly from 2/3 days it is constantly 60% doule the value as earlier. Have gone through the logs and traffic but not able to tarce anything particular
below is the o/p of some command taken for analysis
IOS version 8.0(4) 
sh cpu usage
CPU utilization for 5 seconds = 51%; 1 minute: 61%; 5 minutes: 58%
sh cpu usage


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Cisco WAN :: High CPU Utilization On Router 2821 With 12.4 (24) T1

Jan 19, 2010

I have a Router 2821 with c2800nm-advipservicesk9-mz.124-24.T1.bin and with a Cisco Integrated Service Engine(s) Cisco Unity Express 7.1.1 in slot 1 , this router shows a high cpu utilization.I think is a bug with the IOS , because there is no voicemail configured on the CUE, there is no traffic to the CUE , just traffic from:

- voice calls
- ospf
The ospf  is not the cause of the high cpu , because the high cpu utilization appears before I put the ospf proccess on the router.

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Cisco :: Sudden High CPU Utilization On AIR 1142?

Jun 24, 2012

Five Cisco 1142 integrated in WDS infrastructure: 4 - AP, 1 - WDS with AP... At once on all access points loading of the processor increased to 100 %. And "show proc cpu" - in total in norm, log on all cisco identical below:
(Cisco IOS Software, C1140 Software (C1140-K9W7-M), Version 12.4(25d)JA1, RELEASE SOFTWARE (fc1))
Start problem...
Jun 25 16:11:58: %DOT11-6-ROAMED: Station f0cb.a123.d6f9 Roamed to 0c85.257f.05d0
Jun 25 16:11:58: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station f0cb.a123.d6f9 Reason: Sending station has left the BSS
Jun 25 16:23:36: %LEAPCL-3-TIMEOUT: AP Timed out authenticating to the WDS
Jun 25 16:23:42: %WLCCP_AP-6-INFRA: WLCCP Infrastructure Authenticated
Jun 25 16:23:44: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station a088.b405.7320
Jun 25 16:23:44: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 0021.5dbf.a3da

The problem suddenly began, proceeded about an hour and also suddenly ended...

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Cisco Switches :: High CPU Utilization On SGE-2000

Aug 17, 2012

High CPU Utilization on Cisco SGE-2000 

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Cisco WAN :: 7600 High CPU Utilization Due To Interrupt

Mar 3, 2013

We have next router:
spb-bg3#sh inventory
NAME: "CISCO7604", DESCR: "Cisco Systems Cisco 7600 4-slot Chassis System"
PID: CISCO7604         , VID: V01, SN: FOX1523H7E8


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Cisco WAN :: 3845 Processor High Utilization

Apr 22, 2011

My client using 3845 as a core router . 200 number of branch are connected through 6 ISP.Some of days average process shows 90 % . Max time 50 %.In the morning when Branch location are off then time also high utilization.High utilization is not continue after intervals of time or periodic time its goes to high.
have any solution for that ?. before once 3845 is crash for that. another is ready for replacee.We test another device like core switches for observation CPU rate.

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Cisco WAN :: High CPU Utilization On 7609-S Router?

Jan 20, 2011

Have high cpu utilization on Cisco 7609 router. when i check output "Sh proc cpu sort".

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Cisco Firewall :: High Cpu Utilization On ASA 5520?

Sep 25, 2012

I am seeing high cpu utilization on 5520.
fw# sh processes cpu-usage sorted non-zero
PC         Thread       5Sec     1Min     5Min   Process
0x081e1e11   0x6ddc1528   70.6%   66.5%   66.0%   Dispatch Unit
0x08ed170c   0x6ddb9b48     1.6%     1.7%     1.8%   Logger
0x08dd5f2c   0x6ddafee0     1.5%     1.5%     1.5%   SNMP Notify Thread
0x08e8d045   0x6dd99348     0.1%     0.1%     0.1%   ssh

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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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