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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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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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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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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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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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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Mar 28, 2013
We have a Cisco 3845 router configured as a voice gateway with multi SIP trunks. But when it reachs 200 calls traffic, the CPU increase to 60-70% and caused by CCSIP_SPI_CONTROL process.
CPU utilization for five seconds: 46%/30%; one minute: 54%; five minutes: 58%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
377 400729448 171017979 2343 6.31% 10.71% 12.44% 0 CCSIP_SPI_CONTRO
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Jan 31, 2012
We are facing high CPU Utilization on Cisco 3750X-48P-L without any traffic on it. find the attached log files for 2 separate 3750's stack, we have upgraded the IOS of SW2 from "c3750e-universalk9-mz.122-55.SE3.bin" to "c3750e-universalk9-mz.122-55.SE4.bin" but still we found the same issue with CPU utilization.
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Apr 24, 2013
I've been looking at reported problems with our Vdeio Conferencing kit attched to a stack of 3750's (which I think is down to QoS) but this got me looking at the logs. We get a lot of high CPU utilization warnings mainly for SNMP (315), Hulc running con (95), Virtual exec (289). I understand the last two are normal, and the SNMP one is probably Cisco Works polling as it happens every 4 hours.
However I've got an odd one: Apr 25 07:34:58: %SYS-1-CPURISINGTHRESHOLD: Threshold: Total CPU Utilization(Total/Intr): 93%/0%, Top 3 processes(Pid/Util): 296/85%, 144/0%, 154/0%
What is Pid 296? It's not listed on the switch:
293 39056 18456 2116 0.00% 0.00% 0.00% 0 SpanTree Helper
294 8 73 109 0.00% 0.00% 0.00% 0 EEM Server
295 0 2 0 0.00% 0.00% 0.00% 0 EEM Policy Direc
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May 20, 2012
From couple of weeks we have observed the cpu utilization of cisco 6509 with SUP 720 is high. During daytime from 9:00 to 21:00 it keeps increasing & reaches 98% & after 21:00 becomes normal.
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Mar 19, 2013
Cpu always hitting 70% to 80 % and interrrupt traffic is 70%. Want to know the root cause for this issue.
CPU utilization for five seconds: 73%/65%; one minute: 71%; five minutes: 67%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
1 8 59 135 0.00% 0.00% 0.00% 0 Chunk Manager
2 58864 3290773 17 0.00% 0.00% 0.00% 0 Load Meter
3 1784 238001 7 0.07% 0.01% 0.00% 2 Virtual Exec
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Jan 13, 2013
I have a 2 cisco core (cisco WS-C6509-E (R7000) processor) and been working for quite sometime.they are conneted with HSRP with active standby config with a 10 g module for redundancy just today I see that the cpu utilization went to about 50% and its the same on both cores.
[Code] .......
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May 3, 2012
I have some events where the CPU utilization in a cluster switches of WS-3750 is going to 100%, the process with the major utilization of CPU is the "hulc running con".
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Feb 8, 2011
We have seen high CPU utilization on some Cisco switches of type 2960S. Also we got info, that applications are running with poor performance or with interruption.Following IOS is loaded: C2960s-universalk9-mz.122.55.SE
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Sep 20, 2012
I am seeing a strange situation on my 6500 switch?By having snmp walk on '1.3.6.1.4.1.9.9.109.1.1.1.1.3' (== cpmCPUTotal5sec), I came to know that there are two processor and the cpu util for switching processor is gone to 88 % and some time creeps to 99 %.
snmpwalk -v2c -c "removes" sw6500 '1.3.6.1.4.1.9.9.109.1.1.1.1.3'
SNMPv2-SMI::enterprises.9.9.109.1.1.1.1.3.1 = Gauge32: 12 (--- this is for CPU of Router Processor )
SNMPv2-SMI::enterprises.9.9.109.1.1.1.1.3.3 = Gauge32: 99 (--- this is for CPU of Switching Processor )
but when I do sh process cpu on the console, all looks normal as it shows cpu utilization of RP. why the value is so high on the switching processor ?
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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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Dec 13, 2011
We have cisco 4510R+E switch with IOS-XE Software Version 03.01.01.SG RELEASE SOFTWARE (fc1).Our this switch is having two core & one core is always going to about 90% to 98% cpu utilization while other core is showing normal (about 5% to 10%),we check with-This switch is gateway of our LAN.
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Dec 9, 2011
I am experiencing high cpu utilization in my 29501 switch. see the copied sh process cpu output.
CPU utilization for five seconds: 99%/95%; one minute: 89%; five minutes: 37%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
1 0 2 0 0.00% 0.00% 0.00% 0 Chunk Manager
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May 22, 2012
I am running a 1712 12.4(25d) with NAT, VPN and FW/IDS. I have a broadband ethernet connection at 20mb. As I run some traffic through it, the processor jumps up to near 100% and throughput comes to a screeching halt. IP CEF is turned on and makes no difference when it is turned off or on.
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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:
4444333334444433333333333333333333333333333333333333333333
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Nov 2, 2010
I am looking at the utilization on a Catalyst 3560-E. I am running a test with eight 1 GIGE links RXing at 95 % utilization. All of the traffic is going to a TenGigE port. The device on the TenGigE port is echoing back all of the traffic received, so the 1 GIG links are TXing at 95% as well.When I do a "show controllers utilization", the port utilization numbers are correct, but the fabric utilization is higher than I would expect. The fabric should be 128 gigbits / second in this switch, and there is 7.6 gigabits TX/RX to the ten gig port. The fabric utilization is at 49%. I would expect 7.6 / 128 = 5.9% or possible double that. [code]
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Jan 29, 2011
Cisco 6509 modular IOS getting high cpu in interrupt but the switch process switching is still less. Any sugeestion what could be the problem?
Process sbin/ios-base, type IOS, PID = 16407CPU utilization for five seconds: 12%/81%;
Sometimes cpu goes upto 100%
Version - s72033-ipservicesk9_wan-vz.122-33.SXH5
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Feb 6, 2013
We have a Switch Catalyst 4500, model WS-C4510R+E, with 2 Supervisors, models V-10GE, which is showing high CPU values all times.When this occures, the switch shows 95-100% for total cpu for a few hours at a time.show proccesses cpu shows process Cat4k Mgmt LoPri with an unusual cpu value of 56% The show platform heath command gave me a high reading for K2L2 Address Table R which is curently 9,45% but the last hour is around a 20% average CPU ?[URL] what the process K2L2 Address Table R means and what could be the cause of this peak?
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Jan 2, 2013
getting CPU utilization around 62%
CPU utilization for five seconds: 54%/6%; one minute: 61%; five minutes: 61%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
35 82081 9642 8512 0.31% 0.21% 0.18% 0 Compute load avg
[Code]....
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Sep 6, 2012
I have a Switch WS-C3750E-48PD-SF with IOS 12.2(58)SE2 which reports more than 80% in utilization of memory I don't know what is causing the high memory utilization.
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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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Oct 9, 2012
We have just purchased Cisco 3750X 24 S switches (QTY 2), last week we put them in prodcution in simple Layer 2 mode. No Core, just act as Access switch in order to only check the performace and availibility of switches.
But strange thing I have noticed the highest cpu utilization, cpu sits on 13 to 14% and from historical logs it hit above 60%. I am confused what is happening. Remember to terminate copper connection we have inserted Copper SFP Modules on both switches.
Both switches connected on Layer 2 mode via trunk, in LAN environment we have here 7 3Com 2824 Management switches which are terminated on Copper SFP modules at Cisco 3750X 24 S. All 3Comm Switches uplink are terminated on Cisco 3750 Switch 1, another switch is idle. Whole setup is running on VLAN1 .
Also refer no port in TCP and UDP packets in show ip traffic. any abnormal condition you predict..basically, In near days we plan to make these switches as Core layer and run intervlan routing, HSRP/VRRP and OSPF. But in this cpu usage how we can go ahead until this resolved..
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Sep 25, 2012
We've got Cisco 2821 for our 90mb/s Internet Access. Its CPU usage is around 80%. Show process cpu does not show any cpu proccess with high utilization. But we have got plenty of policing configured for our clients using policy maps. Can this policing affect cpu usage?
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Dec 6, 2011
I've noticed that my 6509's running VSS seem to have high I/O memory utilization.
I/O memory: Sw/Mod Bytes: Total Used %Used
1/1 8126344 7886544 97%
1/2 11796240 11442472 97%
1/5 RP 12058384 10715832 89%
1/5 SP 8388608 8104304 97%
1/7 8126344 7886544 97%
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May 2, 2013
I noticed on the 2960 switches we have deployed that are running the latest IOS, 12.2(58)SE2, memory utilization is really high (almost 80 percent). I have not noticed any side effects but I wanted to verify this is acceptable. My question is does the high memory utilization matter? I see this may be related to bug CSCtw83946 but no resolution is mentioned.
I did some testing various IOS revisions and below is what I have found using a WS-C2960-48TC-L with default configuration and only my laptop connected to a switchport in vlan1. You will notice memory utilization will grows with each version but jumps drastically with 58. One difference with 58 I needed to use a different command to retrieve memory utilization. The output was gathered by pasting the output of the show command into the Cisco Output Interpreter on their website.
IOS
Show Command
Output
c2960-lanbasek9-mz.122-35.SE5.bin
show memory
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Jan 23, 2010
I have a Head Quarter and a remote site running over a OC3 circuit. [code]
On the HQ, I have a Cisco VXR7204 running IOS 12.4.15T(10) Advanced IP Serviceand the remote site is a Cisco 2851 also running IOS 12.4.15T(10) Advanced Ip Service. The HQ has a Riverbed Steelhead 5050H capable of delivering 100MbpsWCCP throughput. The remote site has a Riverbed Steelhead 1050H which can deliver 10Mbps WCCP throughput. At the HQ, the LAN network is 192.168.251.0/24.The Steelhead residing on the 192.168.251.0 network.At the remote site, the LAN network is 192.168.103.0/24 and 192.168.211.0/24.The Riverbed resides on the 192.168.103.0/24 network.
When a host on network 192.168.211.0/24 download a file from network192.168.251.0/24 network via http, the CPU on the Cisco 2851 goes to 99% utilization and that it stays there for the duration of the http session. There is very little traffic goes across the WAN whichis the way it should be but the CPU on the 2851 stays at constant at99% CPU utilization.
Why would WCCP consume so much CPU on the Cisco 2851? By the way, I am only getting about 5Mbps download instead of 90Mbps download, I think because of the high CPU on the router?
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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:
Code...
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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Nov 9, 2012
I am facing high memory utilization in Cisco 2960 switch having IOS version 12.2(55)SE3.
The error we are getting is:
A "LiveHealthAlarm" event has occurred, from SwCiscoIOS device, named Switch2960. eHealth Alarm Start Time - Fri 09 Nov,2012 - 03:02:48 eHealth. Switch2960-RH-MemoryPool-Processor-Processor-1.Memory utilization high-Threshold set at 70%SPECTRUM ALARM ID|22233284 I have attached the logs also.
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