Each queue is given a priority, allowing the CPU to drain higher priority queues before lower priority queues. You can use the debug privileged EXEC command to print to the console all CPU-received packets. Determine if the TCAM is full. If you notice any of these symptoms, follow the troubleshooting steps in this document to alleviate the problem. http://blackplanetsupport.com/high-cpu/troubleshoot-high-cpu-usage-cisco-router.html
For details about configuring HTTP and SNMP on a Cisco router, refer to the Cisco IOS Software Configuration document. You will have to shut down the processes which are not needed. Bridge Process 0 0 0 0 Cache misses 0 Fast 11 660 0 0 Auton/SSE 0 0 0 0 DEC MOP Process 0 0 10 770 Cache misses 0 Fast 0 Answers (10) Posted by: Maher Sadwan 28-September-2016 Why cisco certification is important ?
For more information about logging system messages, refer to the Log System Error Messages section of the Troubleshooting the Router configuration guide. This implies that the IOS device must support both CISCO-PROCESS-MIB and ENTITY-MIB for you to be able to retrieve relevant information about CPU utilization. HACL 0 More than 50 % Too many ACLs configured on the switch in a short time period. The switch counts discarded packets for each queue.
Look at the number of new flows per second. If the CPUAdj value increments rapidly, packets are being punted from switch hardware. Switch# show processes cpu sorted CPU utilization for five seconds: 5%/0%; one minute: 6%; five minutes: 5% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 1 4539 89782 50 0.00% Fed Process Cisco Ask a question, help others, and get answers from the community Discussions Start a thread and discuss today's topics with top experts Blogs Read the latest tech blogs written by experienced
Voice Ports Configured on the Router Even if there is no traffic, software continues to monitor channel-associated signaling (CAS), which uses CPU resources. How To Check Bandwidth Utilization On Cisco Router The console floods at the problem queue. Note:Total CPU utilization should not be used as a measure of the ability of the router to switch more packets. Identify CPU receive queues that are dropping packets due to flooding.
You can enable NetFlow switching by issuing the ip route-cache flow command. Hulc Led Process High Cpu For Eg. You can also use the "Foundation Summary" section to quickly review topics. host—Used for packets with a destination IP address matching any switch IP address.
Using the show cef drop command and the show interfaces switching command (this is a hidden command you can use to look for cache misses), verify that Cisco Express Forwarding isn't Routing topology change, such as BGP route flapping or OSPF route flapping. Troubleshooting High Cpu Utilization Caused By Interrupts Before you activate Debug, what are some of its characteristics that you should consider? Show Memory Usage Cisco Fast switching is enabled by default.
To learn about route summary, see the “Configuring IP Unicast Routing” chapter in the software configuration guide (only Layer 3 switches). news If the largest block is larger than a quarter of the main:text region, use a granularity of 10 ( 16 in hexadecimal). 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 Other processes—Other Processes section of the document Troubleshooting High CPU Utilization due to Processes PCI and FAST Memory Pools Show Very High Utilization It is normal to see low free memory Ip Input High Cpu
You see that RSP is utilized for 10%, and VIPs in slots 4 and 6 are utilized for one and two percent. %snmpwalk -v2c -c public 172.16.0.1 .22.214.171.124.126.96.36.199.188.8.131.52.9 !--- SNMP Query If data is collected periodically, the output of show version shows if the problem has a periodic nature, for example, if it appears always at a certain time of day or Review the syslog for a physical link losing and gaining connectivity. have a peek at these guys The Fast memory is a small amount of memory that has been set aside for use by the hardware Interface Descriptor Block (IDB) data structures.
Is the router inaccessible? Troubleshoot High Cpu Usage Linux Auton/SSE Autonomous switched, silicon switched or distributed switched packets. Slow performance Services on the router fail to respond, for instance: Slow response in Telnet or unable to Telnet to the router Slow response on the console Slow or no response
When the receive queue maximum is reached, the switch hardware discards packets destined for the congested queue. How many processes are running over the router and how many are desired for the production? 2. Unusual activity related to a process results in an error message in the log. Arp Input High Cpu YesNo Thank you for your feedback.
Privacy Reply Processing your reply... Determining Causes and Solving the Problem Use the show processes cpu command to check if CPU utilization is high due to interrupts or processes. Over time, the switch operates within a certain sustained CPU utilization range, which is considered the normal operations baseline. check my blog show platform ip unicast counts Shows routes that are not programmed into the TCAM.
High CPU due to Software Encryption When there is no hardware encryption module installed in the device, then all encrypted traffic coming through the device will have to be encrypted by Contributed by Cisco Engineers Was this Document Helpful? When a particular count is incrementing rapidly, the IP packet type is probably flooding the CPU. For more details, refer to the description of the service timestamps global configuration command.
This message is used to identify objects that use more CPU time than expected (but still not CPUHOG). rpf fail—A queue for reverse path forwarding failures. Knowing the time spent at interrupt is critical for determining the cause of CPU utilization. This is very CPU intensive.
If one of the listed system processes is the most active process in the CPU, it is likely that the corresponding type of network packet is flooding the CPU. High CPU Utilization due to Processes Check which process is loading the CPU. You can see this in show cef interface and show ip interface output. All other IP packets that had a TCAM miss are punted to the CPU.
When High CPU Utilization Is a Problem These sections tell how to identify high CPU utilization and determine if it is a problem: Normal Conditions with High CPU Utilization Network Symptoms This information is useful to identify any counts that are particularly high and incrementing rapidly. Components Used This document is not restricted to specific software and hardware versions. In this case, the router spends one percent at the process level over the last five seconds (process- switched packets - No MIB variable).
Fast Fast switched packets. These packet counts do not include the IP packets switched or routed in hardware. The required CPU time is directly proportional to the number of SNMP query packets received.