Troubleshooting High Cpu Utilization Caused By Interrupts
cisco-ios-12 cisco-6500 snmp share|improve this question asked May 25 '13 at 23:49 Adam Loveless 1,96141646 1 What supervisor are the 6500's running? Events Experts Bureau Events Community Corner Awards & Recognition Behind the Scenes Feedback Forum Cisco Certifications Cisco Press Café Cisco On Demand Support & Downloads Community Resources Security Alerts Security Alerts The first number, 5%, tells how busy the CPU was in the past 5 seconds. Does being engaged (to be married) carry any legal significance? http://technologyprometheus.com/high-cpu/cisco-router-high-cpu-interrupts.html
Checking Memory Utilization Similar to CPU cycles, memory is a finite resource shared by the various processes that together form the Cisco IOS operating system. show sdm templates all Lists the SDM templates available on the switch. Each queue is given a priority, allowing the CPU to drain higher priority queues before lower priority queues. igmp snooping—A queue for IGMP packets.
Troubleshooting High Cpu Utilization Caused By Interrupts
This is normal. Enter the show controllers cpu-interface privileged EXEC command to see the packet count per queue. The most current measurement of CPU busy is 10%. Cisco Hulc Led Process Because of this, it is quite normal for routers to be running at high CPU loads during peaks in network traffic.
If the root cause of the high CPU utilization is a Layer 2 loop, the spanning tree configuration could be the problem. The CPU usage is shown as 40%, but there is no processes that is using this much CPU power. Use the output from the show controllers cpu-interface privileged EXEC command to learn which queues to start debugging first. https://supportforums.cisco.com/discussion/10366736/how-read-cpu-utilization Enter the command several times to see if the counts for sw forwarding are rapidly incrementing.
Enter the Cisco IOS show processes cpu sorted 5sec privileged EXEC command to show the current the CPU utilization and which IOS processes are using the most CPU time. Fed Process Cisco Step 3 logging buffered 128000 Enable system message logging to a local buffer, and set the buffer size to 12800 bytes. High CPU Utilization due to Interrupts For more information, refer to Troubleshooting High CPU Utilization Caused by Interrupts. Browse other questions tagged cisco-ios-12 cisco-6500 snmp or ask your own question.
Cisco High Cpu Ip Input
It is the second number in the 5 second utilization percentage. http://technologyprometheus.com/high-cpu/w3wp-exe-high-cpu-iis.html What is the importance of Bézout's identity? asked 3 years ago viewed 3522 times active 3 years ago Get the weekly newsletter! Two hours ago, it was 39%, and so on. Numbers are shown for the past 3 days or 72 hours. -RayHere is the output from a router that has been up How To Check Bandwidth Utilization On Cisco Router
When the switch CPU is busy, management tools such as Telnet or SSH are usually not very useful. show processes cpu sorted [ 5sec ] Shows percentages for CPU utilization and CPU time spent on interrupts and lists the most active system processes in order of CPU utilization. The HIGHCPU message has no impact on the router. http://technologyprometheus.com/high-cpu/system-exe-high-cpu.html Not sure...
If you notice any of these symptoms, follow the troubleshooting steps in this document to alleviate the problem. Troubleshoot High Cpu Usage Linux Depending on the model and the type being used this can range from 5 to 40% If the switch is stacked then, at a minimum, the CPU will operate normally a The CPU is doing both of these functions simultaneously.
Thus, the CPU is receiving an ICMP packet flood.
compare polling ifHCInOctets on a 6500 with 48 interfaces vs a 6500 with 336 interfaces... Figure 4-10 The show processes cpu Command Output Example The example depicted in Figure 4-10 shows that over the past minute 31 percent of the available CPU has been used and However, it is always better to be safe than sorry and get the CPU utilisation caused by SNMP to bare minimum so as to ensure the Routers function smoothly. Arp Input High Cpu There can be hundreds of active system processes on the CPU at any time.
Thus, more recent values have more influence on the calculated average. All rights reserved. 800 East 96th Street, Indianapolis, Indiana 46240 current community chat Network Engineering Network Engineering Meta your communities Sign up or log in to customize your list. Identifying Network Packets Received by the CPU These techniques to determine the type of packets being sent to CPU can complement each other or can be used individually. Check This Out This is a sample output of the show interfaces switching command for one interface: RouterA#show interfaces switching Ethernet0 Throttle count 0 Drops RP 0 SP 0 SPD Flushes Fast 0 SSE
Symptoms of High CPU Utilization This list describes common symptoms of high CPU utilization. Terminal length is set to something short (15 in this case), and the "q" character is sent only by prompt. Checking Interfaces Checking the performance of the device interfaces while troubleshooting, especially while hardware faults are suspected, is as important as checking your device’s CPU and memory utilization. It is not recommend to use software encryption for any encryption deployment with a reasonable throughput requirement.
show ip route summary Shows the number of route entries used by each protocol. If you are worried that your CPU is running too high I would recommend using a more robust monitoring tool to see the actual cpu load in real time. Used by Cisco system processes to communicate across the stack. show interfaces Command The command reference contains a detailed explanation of the show interfaces command.
See the “Debugging Packets from the Switch CPU Receive Queues” section.