Apr 04, 2014 Contents Introduction Background Information Case Study: Address Resolution Protocol (ARP) Interrupts Step 1: Identify the Process that Consumes CPU Cycles Step 2: Determine the CPU Queue that Causes the High CPU Usage Condition Step 3. Below is the logs from the switch: HOSTNAME#sh ver Cisco IOS Software, IOS-XE Software, Catal. Most of the time high CPU utilization is a software issue and not so much hardware but you never know. According to our customer's feedback, the CPU usage rate of a Cisco aggregation switch has increased recently. sh processes memory platform sorted location switch 1 rp0 (Page 1 only) The switch/stack is running on 16. Troubleshoot High CPU Usage in Catalyst Switch Platforms Running Cisco IOS-XE 16. Please help to resolve the issue. 5b without a noticeable change in CPU levels. In your case, it appeared that the software you loaded would not work with the hardware. Type escape sequence to abort. If the option is #2, it would be highly recommendable if the switch can be COLD reboot. 33 4. Cisco IOS-XE 16 — 概览; 排除 Catalyst 3850 系列交换机高 CPU 使用率问题; Cisco IOS®和IOS®-XE的嵌入式 数 据包捕获配置示例; 在运行IOS-XE 16. The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco. 02. 12-29-2009 02:32 PM - edited 03-06-2019 09:06 AM. You can check if you hit the following bug. Suggesting to upgrade to 03. PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process . 83 1088 fed 5637 968593 64678942 1101 24. Stack Manager and High Availability Commands;. 06 to 16. That train is plagued with defects and anomalies. vManage shows real-time CPU utilization for a device. x (Catalyst 3850 Switches). txt" action 6. Task . Eg. X then this is due to a well-known bug: CSCuo14511. Cisco IOS Software, IOS-XE Software, Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version 03. #sh proc cpu sort | e 0. 252572 2730335 0 0. I am facing high CPU utilization with 3850 switch. 6. 手順4:FEDトレースの使用. 65% 0 SNMP ENGINEThe stack cable could need to be replaced. Cisco IOS Software refers to the single bundled Cisco IOS image for both the Supervisor Engine and Multilayer Switch Feature Card (MSFC) module. WS-C3850-24XS-E. But at the same time other switches' delay is normal except 10. 3 74. Please provide the output to the command "sh processor memory platform sorted location switch 2 r0". Core 2: CPU utilization for five seconds: 57%; one minute: 65%; five minutes: 67% Core 3: CPU utilization for five seconds: 53%; one minute: 61%; five minutes: 62% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 5714 985059 97694899 424 45. Stack Adapter (if applicable) - Reseat the stack adapter at least two times in order to see if it fixes the problem. xxxx being punted to CPU. sample capture from device: switch#Show process CPU sorted | ex 0. This script monitors a SNMP OID used to read the CPU busy percentage in the last 5 seconds. If only one power supply is installed, it should always be in power supply bay 1. 506 Central: %IOSXE-5-PLATFORM: 2 process fed: Logging is not supported for Client/Group ACL Feb 22 07:06:56. The Cisco Catalyst 3850 Series Switch has a number of queues that cater to different types of packets (the FED maintains 32 RX CPU queues, which are queues that go directly to the CPU). ST3-Stack1-3850#sho proc cpu sort | e 0. x (Catalyst 3850 Switches) Chapter Title. Note - For information about unsupported features, see Important Notes. txt"We had the same issue on many stacks and ended up upgrading the IOS to at least Version 03. System returned to ROM by Power Failure. Es importante monitorear estas colas para descubrir qué paquetes se envían a la CPU y cuáles son procesados por Cisco IOSd®. 42 1088 fed 6258 3292482 92102444 4593 23. 1 Catalyst 3850 Series Switch High CPU Usage Troubleshoot Document ID: Contributed by Aninda Chatterjee and Yogesh Ramdoss, Cisco TAC Engineers. 監控這些隊列很重要，以便發現哪些資料包被轉發到CPU，哪些資料包由Cisco IOSd®處理。. show processes cpu | ex 0. What firmware is the stack running on and what is the uptime (post the complete version to the command "sh version"). El switch Catalyst de Cisco serie 3850 tiene varias colas que atienden a diferentes tipos de paquetes (la FED mantiene 32 colas de CPU RX, que son colas que van directamente a la CPU). 例: Cat9300#show platform software fed active punt cpuq all Punt CPU Q Statistics ===== CPU Q Id : 0 CPU Q Name. Investigate Why FED is Punting Packets to the. CSCuo14511 fed and stack-mgr causing High CPU on 3850 . 95% 78. We tried disabling ip dhcp snooping on user VLANs and adding deny all rule for ipv6 but nothing helps. Has anyone seen this and solved it without an upgrade. We use the switch to supply DHCP for the VLANs. 06. . Core 1: CPU utilization for five seconds: 18%; one minute: 24%; five minutes: 28%We have one Catalyat 3850 switch with High CPU utilization. show platform software fed switch active cpu-interface queue retrieved dropped invalid hol-block-----High rate app 994752082 994752082 0 0. Enterprise Switching Business Unit is happy to announce availability of Beta release of 16. 00 Core 0: CPU utilization for five seconds: 94%; one minute: 92%; five minutes: 90% 概要. €. On Catalyst 3850/3650 switches, input PACL and output PACL Access Control Entities (ACEs) are installed in two separate regions/banks. 12. It looks like the fed and iosd process is running high. for one particular 3850 stack, it shows 70%, whereas the switch CLI shows; #sh process cpu sorted. 95 1088 fedI realise cpu core0 of my cisco 3850 switch stack of 4 switches is having high cpu utilization of 100% constantly when i do a "show process cpu | ex 0. HI everybody. CPU Q Id : 23 CPU Q Name : CPU_Q. uSecs . conf" Last reload reason: Critical process fed fault on fp_0_0 (rc=139)Go to Cisco r/Cisco. GM-TI14RO131#sh proc cpu det process iosd | ex 0. Cisco Public 34. 7. The QoS Monitoring feature describes the Quality of Service (QoS) through sample configuration examples. PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY. Dieses Tool ist beispielsweise hilfreich, um Datenverkehr zu identifizieren, der die. ePub - Complete Book (2. Output from top. ステップ3:CPUに送信されるパケットのダンプ. contact Cisco TAC and open a ticket so they can look into the issue. 1a 23/Nov/2017. This is commonly seen when the CPU is interrupted due to ARP packets. 03-10-2009 09:24 PM. 0 Core 0: CPU utilization for five seconds: 45%; one minute: 44%; five minutes: 44% Core 1: CPU utilization for five seconds: 38%; one minute: 44%; five minutes: 45% The problem here I think is something that can't be expressed int this document because I'm seeing this high cpu issue happen on multiple 3850s with multiple images and to multiple queues. primarily due to interrupts, on the new Cisco IOS®-XE platform. I saw that there were similar issues with Cisco ASR devices and a customer poller was created. Cisco 버그 ID CSCup49704 - 3850 FED 충돌. If you have a 3850 stack then use the following command where the number signifies the stack member where the uplink resides: Prompt-3850#show platform acl counters hardware switch 1 | inc SGACL. 06. The CISCO-ENHANCED-IMAGE-MIB provides information about events running on the system and has been extended to be useful for modular operating systems. 07-08-2015 12:38 PM - edited 03-08-2019 12:53 AM. Monitor High CPU via SNMP OID. Cisco bug ID CSCup49704€- 3850 FED Crash - Waits for SPI channelsWe have a switch stack with 2 x WS-C3850-48T that is hitting high CPU usage. 0 Core 0: CPU utilization for five seconds: 53%; one minute: 39%; five minutes: 41% Core 1: CPU utilization for five seconds:. 0(2a)EX5 with the CPU processes to follow:. Layer 2 and Layer 3 Configuration Guide, Cisco IOS XE Everest 16. adams 2. 33% 0 SNMP ENGINEI have VSS running on 2 cisco WS-C4506-E. PDF - Complete Book (9. 283 I 574800 3225649 0 4. Checked from the monitoring software, the CPU usage is high. Resolution resolved our issue. so that you can only see the processes that actually use CPU cycles. Problem analysis process. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed;. さらに、このドキュメントでは. Address Resolution Protocol Interrupts Step 1. show processes cpu sort | exclude 0. 5 Helpful. 6 28. 20 has the issue while . MAC address Hw Ver. Catalyst 3750XのCPU使用率が高いという問題があり、シスコ社の文書を参考にしてトラブルシューティングを行いました。. Identify the Process that Consumes CPU Cycles Step 2: Determine the CPU Queue that Causes the High CPU Usage Condition Step 3: Dump the Packet Sent to the CPU Step. ARP Requests from Apple Devices High CPU. A vulnerability in the IP Version 4 (IPv4) processing code of Cisco IOS XE Software running on Cisco Catalyst 3850 and Cisco Catalyst 3650 Series Switches could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service (DoS). The high CPU utilization is caused by constantly recalculating paths. 2. ) run high on CPU and there is really not much you can do about it except upgrading to a different version, and that sometimes help but not always. Please see details below. 6. 6, haven't seen any related bugs for this version. 80. 35 Command Summary - High CPU Troubleshooting Steps Check CPU usage on IOS threads Commands show process cpu detailed process iosd [sorted] Check CPU usage on platform dependent and Nova threads Check traffic on the RX and TX CPU queues show process cpu detailed process {fed platform_mgr stack-mgr ha_mgr. In Cisco IOS XE Release 3. [6] The switch ships with one power supply by default, and the second power supply can be purchased at the time of ordering the switch or at a later time. 10-08-2013 09:30 AM - edited 03-07-2019 03:54 PM. However, due to the differences in architecture and forwarding mechanisms between. 2 cli command "enable" action 0. 07-15-2013 10:39 PM. This will be the second beta rebuild on 16. My Catalyst 3850 is showing high CPU utilization and I am unsure what is causing the issue. This release note gives an overview of the features for the Cisco IOS XE Denali 16. 3 or Earlier Address Resolution Protocol Interrupts. Switch Ports Model Serial No. These switches seem to be working fine with no CPU issues so far but as I said before they all have bugs. We are looking for early feedback from customers before 16. Es importante monitorear estas colas para descubrir qué paquetes se envían a la CPU y cuáles son procesados por Cisco IOSd®. Cisco bug ID CSCup49704€- 3850 FED Crash - Waits for SPI channelsCisco Employee オプション. x software on the Cisco Catalyst 3850 Series Switches. 4 and below is a copy of the command "show process cpu | ex 0. I have already found out that the high core usage is only happening on switch 1. 如果最近没有对网络进行任何更改，则安全问题尤其. . we had an alert through for a sustained period of high cpu usage, upon investigation we observed the following. show platform cpu packet. Initiating Graceful Switchover. 2E iosixe version where i can observe high cpu due to below process. and activating IPV6 MLD snooping solved . 4, and 16. Das FED-Tool zur CPU-Paketerfassung hilft bei der Identifizierung von Daten, die die Kontrollebene passieren, und liefert Informationen über unterbrochenen Datenverkehr ( Pakete von ASIC zu CPU) oder injizierten (Pakete von CPU zu ASIC). Cisco shows fed (PunjectRx and Xcvr) process is mostly consuming the CPU. System memory: 3980144K total, 3493056K used, 487088K free, Lowest: 487088K. The output (Cisco IOSd® CPU output) shows that ARP Snoop, IP Host Track Process, and ARP Input are high. ステップ1:CPUサイクルを消費しているプロセスを特定する. IStep 2: Determine the CPU Queue that Causes the High CPU Usage Condition. Cold reboot means pulling the power cable(s) and not issue the "reload" command. MAC address Hw Ver. The idea with switches is to process the traffic at the hardware level (using the ASICs) when possible. 72% Switch #2 (the ironic thing is that this switch is a hot spare and has nothing plugged into it) stack-mgr = 32. 0 cli command "show platform punt statistics port-asic 0 cpuq -1 direction rx | append flash:HG-CPUlog. 71 69. The CPU on the Cisco StackWise Virtual active switch. EEM-Beispielskript (Embedded Event Manager) für Cisco Catalyst Switches der Serie 3850. Stack Manager and High Availability. 1) Collect the below output periodically and check whether the "Size" counter increases over time for "platform_mgr" process. High CPU的问题一般分进程高和中断高两种。中断高常由于实时的流量造成，要根据网络的实际情况具体分析，原因有很多种。进程高，不同的进程也有不同的root cause。 在比较常见的几种占用CPU资源进程中，有一种叫 IP Input。Core 2: CPU utilization for five seconds: 93%; one minute: 96%; five minutes: 95%. Quite a few IOSs in the 3750s, will use a lot of CPU for Hulc LED process, but that normally doesn't impact performance. This is the output from the command show processes cpu sorted. #show processes cpu detailed process iosd sort | ex 0. Its definitly some kind of bug, disable dhcp snooping is our solution, but that wasnt the question. Since you have tried all the option we have now the last resort is Open a TAC case with bug id, so they can able to suggest to best. txt" action 0. 242 808819595 3949538 204800 65. CAt 9300 is the better option and cisco more promoting Cat 9300 rather. 通过设备 showprocess cpu sorted detai led 可以看到CPU四个核基本都达到90%以上，其中占用最多的进程为fed。. A vulnerability in the IP Version 4 (IPv4) processing code of Cisco IOS XE Software running on Cisco Catalyst 3850 and Cisco Catalyst 3650 Series Switches could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service (DoS). High CPU observed in punjectrx fed-ots-main thread. X的Catalyst交换机上配置Punt/Inject FED数据包捕获 ; 技术支持和文档 - Cisco Systemswrote: PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 5881 3303778 46124849 472 49. Options. . Here are some outputs: switch#sh proc cpu sort | e 0. 3. Core 3: CPU utilization for five seconds: 30%, one minute: 39%, five minutes: 36%. A different VLAN-ID can be set in the switch for the AVB VLAN using cli avb vlan <vlan-id>. _MX# sh processes cpu detailed process fed sorted Core 0: CPU utilization for five seconds: 6%; one minute: 5%; five minutes: 5%. 01-09-2020 07:33 AM. 3 cli command "show process cpu sorted | append nvram:. We have two 24 port 3850 switches stacked. 03aSwitching . after a while it recovery to normal. Although the RSPAN VLAN does not learn any MAC addresses, a copy of the packet with unknown source MAC is still sent to and dropped at the CPU. r/Cisco. clear socket PID. 0 Core 0: CPU utilization for five. Stack Manager and High Availability. 05 will be stable ? or 16. In some network deployments, a busy CPU is normal. 12. 6. 3 has a possible issue with the FED (Forward Engine Driver) which can take cpu 0 to 100%, while it should not affect network performance. switch# show lacp sys-id. Fast-switching #2 is somewhat obsolete. Does anyone know how to fix high CPU utilization caused by SSH on 6509-e? SW-CORE-6509#sh processes cpu sorted | e 0. Beginner Options. DC1#show process cpu detail process fed sorted | ex 0. 4802: -Process= "IOSD ipc task", ipl= 0, pid= 74. 4 software release is posted on CCO for General Availability (GA). I hope this helps!1 12 WS-C3750G-12S 12. PT-3850#show proc cpu sorted The stack has been up for 1 Year and 16 weeks. " Reference: Catalyst 3850: Troubleshooting Output drops. NOTE: Stack in Bundle Mode. #sh processes cpu detailed process fed sorted 1min | e 0. Cisco shows fed (PunjectRx and Xcvr) process is mostly consuming the CPU. Post the complete output to the following commands: sh platform software status control-processor brief. 10-11-2017 08:11 AM. Like. WS-C3850-12XS-S. Core 0: CPU utilization for five seconds: 1%; one minute: 4%; five minutes: 23%. Diagnose a Potential Stack Cable or Port Issue. We pulled the same config from the 2960X and now the 3850 is hitting 90%+ CPU. If you're having constant high cpu on 3. WS-C3850-12XS-S. 0 show proc cpu sorted | ex. Check that the CPU utilization is not too high. As stated earlier, I plan to upgrade the software to 3. The nagios reports the following message: "cisco_load | CPU: 99 99 99 : 99 > 98". I was struggling with high CPU utilization problems happening on the distribution switch. 04. Release Notes for Catalyst 3850 Series Switch, Cisco IOS XE Release 3. RegardsThe CPU is so high but there is any process consuming the CPU as you can see bellow. Masks/Values Masks/values. action 3. 3. EEM-Beispielskript (Embedded Event Manager) für Cisco Catalyst Switches der Serie 3850. cisco 3650 CPU占用高 查看解答. x. Thanks PL. In Polaris code, use the following: show platform software fed switch x acl counters hardware. Problem analysis process. This command would also list the processes as shown below but it would not add up to 100%. 12. 03. NCM is reporting lower CPU for our 3850 & 3650 switches. Schritt 3: Verwerfen Sie das an die CPU gesendete Paket. If there is SFP port in use, it might be a little bit high. EN US. 3 0 fed. Description. Please see the output from sho platform software fed switch active cpu-interface. 0 cli show processes cpu sort >> bootflash:high-cpu. 07. 4802: -Process= "IOSD ipc task", ipl= 0, pid= 74. xxxx being punted to CPU. 02 1088 fed Hi all, I have a stack of 4 Catalyst 3850-24X working as a distribution switch, lying in between a Nexus 7K core switch and 34 C3850 access switches/stacks. I performed the platform packet capture and it's indeed a lot of ARP Requests being spammed. CPU utilization of the process in minutes and seconds. you have to execute "show platform QoS queue stats" output to check for drops. Eg: switch# show platform software process list switch active R0 sort memory. 6 28. Few of our branch office switches are running with high memory utilization, we are receiving alerts on our monitoring tool for the same. 6. Stack Manager and High Availability Configuration Guide, Cisco IOS XE Fuji 16. Beginner. 11 0. Field Notice: FN - 64191 - Catalyst 3850/3650 Switches That Run Cisco IOS XE Releases 3. Invoked . show process cpu sorted | ex 0. 26 50. - Update both Power Supplies and RPS. We have (11) 3850's; 2 are stacked and 9 standalone. 2. The show process cpu command is used in order to display the current process state inside of the IOSd daemon. 506 Central: %IOSXE-5-PLATFORM: 2 process fed: Logging is not supported. We have a problem with 3650 and 3850 with high CPU, the problem is that we cant detect it in our management systems until the CPU is so high that the switches is not responding to snmp. 109. x (Catalyst 3850 Switches) Chapter Title. To perform a manual switchover and to use the high availability feature enabled in the switch, execute the redundancy force-switchover command. Darüber hinaus werden in diesem Dokument verschiedene neue. 6. FN - 64191 - Catalyst 3850/3650 Switches That Run Cisco IOS XE Releases 3. Hi Guys, i have one cisco switch WS-C3850-48XS-S with image 16. Similar to Cisco routers, switches use the show processes cpu command in order to show CPU utilization to identify the causes of high CPU utilization. SE. You can use following procedures to find out if your Catalyst switch seeing high CPU utilization is affected by this problem, and implement respective solutions. I noticed that sh run, wr and some other sh commands are taking forever to execute. WS-C3850-24XS-S. The memory utilization for switch 2 is abnormally high (ideally <50%). 0 Core 0: CPU utilization for five seconds: 19%; one minute: 25%; five minutes: 26% Core 1: CPU utilization for five seconds: 17%; one. High CPU utilization percentage with a low interrupt percentage indicates a problem with an operating system process. Symptom: When abruptly reloading (eg: manual power cycle) or adding/removing a switch member from a 3850 stack, other switches in the stack may begin crashing on the FED (forwarding engine driver) due to a timeout on the SPI, which is the internal message-passing system that lets services communicate with one. 0 Core 0: CPU utilization for five seconds: 53%; one minute: 39%; five minutes: 41% Core 1: CPU. This command initiates a graceful switchover from the active to the standby switch. Schritt 2: Bestimmen der CPU-Warteschlange, die die hohe CPU-Auslastung verursacht. 1900 <-- Your system MAC address. Here is the part of the "show process cpu sorted". 62 34816 iosd . 74 1088 fed. PDF - Complete Book (8. Core 2: CPU utilization for five seconds: 100%; one minute: 99%; five minutes: 99% Core 3: CPU utilization for five seconds: 100%; one minute: 99%; five minutes: 100% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 5635 4023094 34582089 2885 74. 1. 6. But I canSwitching High CPU troubleshooting on cisco 3850; Options. The Cisco® 40GBASE QSFP (Quad Small Form-Factor Pluggable) portfolio offers customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing 00networks, enterprise core and distribution layers, and service provider applications. This command gives you a list of active processes, along with their corresponding process ID, priority, CPU time used, number of times invoked, and other information. we had an alert through for a sustained period of high cpu usage, upon investigation we observed the following. This is commonly seen when the CPU is interrupted due to ARP packets. Also, I was reading this about NX-OS : The Cisco NX-OS operating system takes advantage of preemptive CPU multitasking, so processes can take advantage of an idle CPU in order. 93 0 stack-mgr 5846 3930459 20739688 103 24. txt. Check if somebody is logged into and executing commands through an SSH session. 69 34817 iosd There are several bugs involving high CPUs and "stack-mgr" and "iosd" processes and CSCuo14511 is one of them. Although the RSPAN VLAN does not learn any MAC addresses, a copy of the packet with unknown source MAC is still sent to and dropped at the CPU. 5. Home; Documents; Troubleshooting Cisco Catalyst 3850 and 3650 Series. Unless otherwise noted, the terms switch and device refer to a standalone switch and to a switch stack. 27777 26990 0% 0% 0% S 314179584 fman_rp. x software on the Cisco Catalyst 3850 Series Switches. Release Notes for Cisco Catalyst 3850 Series Switches, Cisco IOS XE Denali 16. 50 69. Linux will schedule a process (remember IOSd is a single process from the Linux perspective) on a CPU core based on a number of different factors, including utilization of the other cores at any given time. show proc cpu | exclude 0. 2 27. Here is some output: SW58#sh mod. 4799: Memory allocation of 3380 bytes failed from 0xAAB9E1E5A0, alignment 8. Schritt 4: Verwenden der FED-Ablaufverfolgung. CAM Utilization for ASIC# 0 Max Used. Étape 2 : Déterminez la file d'attente du processeur qui entraîne la condition d'utilisation élevée du processeur. A value for exit-val ensures that the script does not run in an endless loop. 27777 26990 0% 0% 0% S 314179584 fman_rp. 10187 2009764 10763907 145 1. 06. 80. The default queue structure is unified across all Cisco Catalyst 9000 family switches for all ports, regardless of speed, and is based on a two-queue model. With the 17. 2. And I knock to command being delay. Cisco 3850 CPU usage FED / PDSEvent My Cisco 3850 stack is having some higher than normal CPU usage on the FED process and the PDSEvent Process. For example, on a 3650 I have traffic punted to the CPU from FED for SW forwarding queue and notice a lot of dropped packets. 0 #show process cpu detail process fed sorted Core 0: CPU utilization for five seconds: 67%; one minute: 61%; five minutes: 63% Core 1: CPU utilization for five seconds: 90%; one minute: 63%; five minutes: 68% Core 2: CPU utilization for five seconds: 44%; one minute: 77%; five minutes: 74% Core 3: CPU utilization for five seconds: 99%; one. Use this handle in the show pds client <handle> packet last sink command. 0 Core 0: CPU utilization for five seconds: 34%; one minute: 35%; five minutes: 41% Core 1: CPU utilization for five seconds:Core 2: CPU utilization for five seconds: 100%; one minute: 99%; five minutes: 99% Core 3: CPU utilization for five seconds: 100%; one minute: 99%; five minutes: 100% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 5635 4023094 34582089 2885 74. 通过设备 showprocess cpu sorted detai led 可以看到CPU四个核基本都达到90%以上，其中占用最多的进程为fed。. - Check the status of the transceiver. Use show process cpu , to determine which process causes this issue. Invoked . 89 0 iosd-FED process crash -flash write issue -Traffic destined to the CPU is dropped following a reload and a shut/no shut of SVI fixes it until the next reload. E. Mem: 7508840k total, 6830632k used, 678208k free, 67344k buffers. x. I was looking at a show proc CPU history on a 3850 (IOS-XE) switch and I see short CPU spikes. Delivery of Cisco cryptographic products does not imply third-party authority to import, export, distribute or use encryption. 42 1088 fed 6258 3292482 92102444 4593 23. 通常，CPU 使用率较高是由安全问题（例如网络中运行的蠕虫或病毒）引起的。. PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process . the second number in arrow above shows the interrupt percentage value. Core 1: CPU utilization for five seconds: 34%; one minute: 14%; five minutes: 13%. An E-series Catalyst 4500 switch configured with RSPAN might display high CPU utilization during the host learning process. 54 0 stack-mgr For temparary remdiation, if you have maintenance window, reboot teh device and test. According to our customer's feedback, the CPU usage rate of a Cisco aggregation switch has increased recently. 1.