Enabling service internal followed by debug platform log feature k2l2addresstable will show output similar to the following. Once updated I rebooted and these machines dropped off my report as well. Also, you may want to fire up wireshark and see there's an abnormal amount of broadcasts on the network. 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 this contact form
The 16 queues allow the Catalyst 4500 to queue the packets on the basis of the packet type or priority. Similar to the classic switches, the E-series switches, has the powerful tools and sufficient commands to aid in the identification of the root cause of high CPU-utilization scenarios. This mechanism allows the CPU to run high-priority processes when necessary. Any examples, command display output, and figures included in the document are shown for illustrative purposes only.
Background Information Before you look at the CPU packet-handling architecture and troubleshoot high CPU utilization, you must understand the different ways in which hardware-based forwarding switches and Cisco IOS Software-based routers 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 Layer 2 forwarding loops Layer 2 forwarding loops can be caused by poor implementation of Spanning Tree Protocol (STP) and various issues that can affect STP. Marginally exceeding the target CPU utilization (or a brief utilization spike) does not reflect a problem that requires investigation.
Figure 2 indicates this requirement. Also, review the Configuring Network Security with ACLs configuration guideline in order to optimize the ACL configuration and programming in the hardware. Jan 21, 2012 I have a new cisco 3750 stack comprised of 8 members (6 x 3750G-48PS and 2 x 3750V2-48PS) running 'c3750-ipservicesk9-mz.122-58.SE2.bin'. Adj Sameif Fail Mar 19, 2013 Cpu always hitting 70% to 80 % and interrrupt traffic is 70%.
The solution is to disable ICMP redirect. This situation occurs in Cisco IOS Software releases earlier than Cisco IOS Software Release 12.2(20)EWA. I then found and downloaded the latest driver which came out a couple of months ago. I checked back with my switch and here is an idea of what I saw once all machines had been worked on:
Switch# show processes cpu sorted
Step 1: Check for the Cisco IOS process with the show processes cpu command. K5l3unicast Adj Tabl we have got 5 similar switches in other floors having the same problem. In order to determine the type of traffic that hits the CPU, issue the show platform cpu packet statistics command. We get a lot of high CPU utilization warnings mainly for SNMP (315), Hulc running con (95), Virtual exec (289).
This root cause is one of the common reasons for high CPU utilization on the Catalyst 4500. The following table provides some basic information about the important platform-specific processes that appear in the output of the show platform health command. K5cpuman Review High Cpu Best regards, Andras On Wed, Aug 31, 2011 at 11:53 PM, Terry Rupeni <rupeni_t [at] usp> wrote: > Hi All, > > > > We have a Cat4506 facing high CPU. K5 L2 Hardware Address High Cpu LAB Router#show ip trafficIP statistics: Rcvd: 3249411 total, 2367891 local destination 0 format errors, 0 checksum errors, 200092 bad hop count 0 unknown protocol, 0 not a gateway 0 security failures,
http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00804cef15.shtmlCategories: Switching No TrackBacks TrackBack URL: http://www.ryanhicks.net/cgi/mt/mt-tb.cgi/2 Leave a comment Name Email Address URL Remember personal info? weblink The change can lead to a traffic black hole if you have devices in your network which are mobile. Refer to the High CPU troubleshooting document from corresponding information for the classic supervisor engines. In the output, notice that the K2CpuMan Review process uses most of the CPU cycles. Cisco 4500 Iosd Process High Cpu
However, not all devices respond to an ICMP redirect. This mechanism guarantees that the network is stable even under high utilization of the CPU. The sniffer is truly the tool to solve this particular issue. navigate here Other things to consider here is the possibility of a Denial of Service (DoS) attack.
When you say 100% utilization is that the average usage??? K2l2 Address Table R Contributed by Cisco Engineers Was this Document Helpful? View 5 Replies View Related Cisco Switching/Routing :: WS-3750 - High CPU Utilization May 3, 2012 I have some events where the CPU utilization in a cluster switches of WS-3750 is
Control packets that are captured by the input static ACL (such as OSPF, HSRP). The Catalyst 4500 Series Switch CPU performs the following functions: •Host learning and aging - Host learning and aging in hardware is not supported on Catalyst 4500 series switches and Catalyst Switch#show platform cpu packet statistics all !--- Output suppressed. Packetbufraw Root Guard—Enforces root bridge placement in the network.
Default action is to drop. Non-Cisco IP phones do not support this voice VLAN or auxiliary VLAN configuration. Cisco Switching/Routing :: High Fabric Utilization On 3560-e Cisco Switching/Routing :: 6509 Modular IOS High CPU Utilization? http://blackplanetsupport.com/high-cpu/mac-os-x-mail-high-cpu-usage.html In order to troubleshoot high CPU utilization, look for a higher number in the %CPU actual column in the output.
Switch#show platform health %CPU %CPU RunTimeMax Priority Average %CPU Total Target Actual Target Actual Fg Bg 5Sec Min Hour CPU Lj-poll 1.00 0.03 2 0 100 500 0 0 0 9:49 For example, a spike of CPU utilization is normal during the hardware programming of a large ACL in the TCAM. TagMan-RecreateMtegR 1.00 0.00 10 4 100 500 0 0 0 0:00 K2CpuMan Review 30.00 27.39 30 53 100 500 42 47 42 4841: K2AccelPacketMan: Tx 10.00 8.03 20 0 100 500 Note This document applies only to Cisco IOS Software-based switches and not CatOS-based switches.
Table 3– TCAM Capacity on Catalyst 4500 Supervisor Engines/Switches Product Feature TCAM (per Direction) QoS TCAM (per Direction) Supervisor Engine II+/II+TS 8192 entries with 1024 masks 8192 entries with 1024 masks Cheers, Mark. _______________________________________________ cisco-nsp mailing list cisco-nsp [at] puck https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ Index | Next | Previous | Print Thread | View Threaded Cisco BBA NAS NSP Examples of software-forwarded packets are IPX or control packets, such as BPDUs. But there can be an excessive number of topology changes because of a flapping link, faulty switch, or host ports that are not enabled for PortFast.
Now we just keep capturing until the options value of the show ip traffic command starts to increment... On the next few I tried only updating the driver, nothing else. Help Desk » Inventory » Monitor » Community » This output is from a fully loaded Catalyst 4507R.
These processes process control plane as well as data packets that need to be software-switched or processed. For some of the protocols (OSPF and HSRP), the access-list cannot determine whether the feature is configured; all the control traffic is captured. Troubleshooting Tools to Analyze the Traffic Destined to the CPU All E-series switches have CPU analyzing tools such as the CPU traffic SPAN and the Built-In CPU sniffer. ACL is programmed from the top down.
This identification enables you to debug the high CPU utilization problems. Switch# show processes cpu sorted CPU utilization for five seconds: 75%/0%; one minute: 80%; five minutes: 79% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 54 16177852 1680243 9628 58.89% Cisco Switching/Routing :: 2811 / Reduce The High CPU Utilization? Cisco Switching/Routing :: 3750 Stack - High Memory Utilization?
Table 2 – Description of the Platform-Specific Processes from the show platform health Command Platform-Specific Process Name Description Pim-review Chassis/line card state management Ebm Ethernet bridge module, such as aging and The first one I tried traced back perfectly as expected as this was a true, physical host. Users were telling me that somehow the system will close unexpectedly and the CPU usage was the problem of this.