Otherwise, we're just guessing. Packets Received by Packet Queue Queue Total 5 sec avg 1 min avg 5 min avg 1 hour avg ---------------------- --------------- --------- --------- --------- ---------- Esmp 48613268 38 39 38 39 If the root cause of the high CPU utilization is a Layer 2 loop, the spanning tree configuration could be the problem. High CPU Utilization due to Processes Check which process is loading the CPU. Check This Out
To do this you can use the show processes cpu sorted command as follows: Some of the sample output is as follows …. Even though you do not see a command prompt, the switch accepts the undebug all command at any time. However, the best way to address this issue is to get a Hardware Encryption module installed for this device which eliminates the need for encryption to take place through the software. 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 http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/troubleshooting/cpu_util.html
If the interrupt percentage is too high relative to the total CPU utilization percentage, the CPU utilization problem is caused by receiving too many packets from system hardware. After you enter the command, allow some time for the buffered debug messages to subside and for the debugging message buffer to empty. Unresolved Issues If the troubleshooting steps in this document do not help you to determine the root cause of high CPU utilization, you should contact the Technical Assistance Center (TAC) for The Catalyst 2960 switch running the LAN base image has a smaller number of active processes than a stack of Catalyst 3750 switches.
For ease of use, save the script in a file such as /usr/bin/router-script. This output is from a fully loaded Catalyst 4507R. The first packet for this destination (or flow - depends on the type of fast switching configured) will be processed. Ip Input High Cpu Old static routes that could be causing a loop?
Otherwise, we're just guessing. This memory is used for internal communication between the system controller and other parts, so it appears to be high all the time. This is very CPU intensive. Issue the show spanning-tree summary command.
Note:Total CPU utilization should not be used as a measure of the ability of the router to switch more packets. Cat4k Mgmt Lopri High Cpu Close to half of the switching packet-per-second power comes after 90 to 95 percent CPU utilization. Therefore, the CPU usage is high when building a new running configuration process and when forwarding the new configurations to other switches. But, if the CPU is high due to traffic being punted to the CPU, you need to determine why the traffic is being punted.
You can see that the L3 Fwd Low queue receives quite a lot of traffic. A sustained CPU utilization of over 50 percent is potentially problematic. Hulc Led Process High Cpu In order to determine the type of traffic that hits the CPU, issue the show platform cpu packet statistics command. Show Memory Usage Cisco You can determine that the packets that the CPU processes and the reason for the high CPU utilization is BPDU processing.
Broadcast suppression uses filtering that measures broadcast activity on a LAN over a 1-second time period and compares the measurement with a predefined threshold. his comment is here Use the show platform cpu packet statistics command for all troubleshooting. show interfaces Command The command reference contains a detailed explanation of the show interfaces command. L2 protocol—Used for protocol packets such as UDLD, and so on. How To Check Bandwidth Utilization On Cisco Router
If a process exceeds the target/expected utilization, that process runs under the low-priority context. Before you activate Debug, what are some of its characteristics that you should consider? Determine baseline CPU usage, and identify when spikes occur. this contact form If a stack of Catalyst 3750 Switches that run Cisco IOS Software Release 12.1(14)EA1a are connected to another switch, such as a Cat6500 that runs CatOS, which generates MAC-based IGMP queries
Switch# show platform tcam utilization CAM Utilization for ASIC# 0 Max Used Masks/Values Masks/values Unicast mac addresses: 6364/6364 31/31 IPv4 IGMP groups + multicast routes: 1120/1120 1/1 IPv4 unicast directly-connected Cisco Fed Process Consider changing the SDM template. Identifying the Cause as System Process or Network Traffic To determine how busy the CPU is and which operating system processes are using the most CPU time, enter the show processes
Notice line that starts with 0070. Use the first 16 bits after that as shown here: 3850-2#show platform port-asic ifm iif-id 0x0104d88000000033Interface TableInterface IIF-ID : 0x0104d88000000033Interface Name : Gi2/0/20Interface Block Pointer : 0x514d2f70Interface State : READYInterface Stauts Understand the Catalyst 4500 CPU Packet-Handling Architecture The Catalyst 4500 has an in-built quality of service (QoS) mechanism in order to differentiate between types of traffic that are destined to the How To Check Utilization On Cisco Router Interface This warning message appears when a TCAM overflow happens: %C4K_HWACLMAN-4-ACLHWPROGERRREASON: (Suppressed 1times) Input(null, 12/Normal) Security: 140 - insufficient hardware TCAM masks. %C4K_HWACLMAN-4-ACLHWPROGERR: (Suppressed 4 times) Input Security: 140 - hardware TCAM
With the Catalyst 6500, there is an access list engine that enables filtering to take place at wire rate. Was this Document Helpful? Therefore, the impact on the CPU is not as great as before the improvement. http://silkiconfinder.com/high-cpu/vlc-high-cpu-usage-mkv.html For a complete list, refer to the PBR Configuration Guidelines.
However, the next hop router that enables the Catalyst 4500 to reach the destination is in the same subnet as PC A. Starting in IOS 12.2 T, the “show processes cpu history” command gives a nice CPU utilization graph. Issue the command under the relevant SVI or L3 interface. For example, if both a control packet, such as a BPDU, and an ICMP echo request are pending, the CPU services the control packet first.
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