vlan troubleshooting tools

Troubleshooting of non-synchronous VLAN configuration information in VTP, vtpvlan VTP (VLANTrunk Protocol, VLANTrunk Protocol) is a dedicated Cisco VLAN used to maintain and manage dynamic VLANs (such as VLAN Based on MAC addresses, IP addresses, network protocols, and VLAN

the following troubleshooting steps. (1) The VLAN6 and VLAN7 VLAN information in the Annette Network management switch All deleted, all the ports are zoned in the normal VLAN1 of the Internet, which they completely and VLAN1 the same. But the problem remains the same, while the users in other office areas VLAN1 the Internet. (2) from the Step (1) inferred that the problem is not the

below: 6509 # conf t Enter configuration commands, one per line. End with CNTL/Z. 6509 (config) # interface gigabitEthernet 3/48-enter the cascade interface 6509 (config-if) # switchport trunk? -View the Trunk status Allowed Set allowed VLAN characteristicswhen interface is in trunking modenative Set trunking Native characteristics when interface is in trunking modepruning Set Pruning VLAN characteristics

Chapter 8 JVM performance monitoring and troubleshooting tools (2), jvm troubleshooting Note: This blog is mainly recorded in "deep understanding of Java Virtual Machine (version 2)" Note: For details about JVM performance monitoring and troubleshooting tools on the command

Chapter 7 JVM performance monitoring and troubleshooting tools (1), jvm troubleshooting 1. Locate System Problems Basis GC log Heapdump/hprof File) Thread snapshot (threaddump/javacore file) Running log Exception Stack Tools used for analysis Jps: displays all JVM processes in a specified

Java virtual machine performance monitoring and troubleshooting tools, virtual machine troubleshooting 1. jdk command line tool 1) jps: Virtual Machine Process status Tool Jps [option] [hostid] Main parameters: 2) jstat: Virtual Machine statistics monitoring tool Jstat- Main parameters: For example, if the gc information of process 8675 is queried twice every 8

parsing the Java stackThe jstack is used to generate thread snapshots at the current moment.Use the following methods:123456789101112131415Usage:Jstack [-l] (to connect to running process)Jstack-f [-M] [-l] (to connect to a hung process)Jstack [-M] [-l] (to connect to a core file)Jstack [-M] [-l] [[email protected]](to connect to a remote debug server)Options:-F to force a thread dump. Use if Jstack -M to print both Java and native frames (mixed mode)-L Long listing. Prints additional informati

[-] Memory troubleshooting tools and related documents introduction focus 1 procsysvmmin_free_kbytes 2 procsysvmdrop_caches 3 Procsysrq-trigger 31 interpretation of the echo m Procsysrq-trigger output 4 Cat Procslabinfo 5 Cat Procmeminfo 51 Important Information 6 Top Information 7 Free Command 8 other files in the PRO

Troubleshooting tools for ISA Server 10.1.3 Exercise: Test port status In this exercise, you need to use the Netstat and Telnet commands to determine the port status of the ISA Server computer. This technique can be used to verify security or to determine whether services running on the ISA Server computer are available to external sites. Exercise: Test the ISA Server port In this exercise, run the Netstat

Options Role -F Forces the output thread stack when a normal output request is not responded to -L Displays additional information about the lock, in addition to the stack -M If you call to a local method, you can display the C + + stack Jstack Execution ExampleJust intercept the part and see this is the 10492 thread snapshot of the current time of the virtual machine process ID. The thread is in the run

Options Role -F Forces the output thread stack when a normal output request is not responded to -L Displays additional information about the lock, in addition to the stack -M If you call to a local method, you can display the C + + stack Jstack Execution ExampleJust intercept the part and see this is the 10492 thread snapshot of the current time of the virtual machine process ID. The thread is in the run

solve these problems. PTA works to diagnose the causes of Exchange server performance problems. Similar to Performance Monitor, PTA needs to occupy some system resources, which causes the performance of servers that lack system resources to decline further. However, we must remember that the PTA tool is designed to use the least effort to find the root cause of the problem, however, tools like Performance Monitor require you to guess what is wrong an

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This article reads the reading notes for the deep understanding of Java Virtual Machine-JVM advanced features and best practices, and it organizes the performance monitoring and Troubleshooting section of the virtual machine.About the two parts of the guide map or hope that you can personally test the experience, there are a lot of articles on the Internet, here are excerpts from several individuals think good articles for reference: Jstat/ji

Registry. Run msconfig and set the system back to normal booting. Shut down the VM. In XenServer Console, change the device_id parameter for the VM using the command XE vm-param-set uuid={your uuid} PLA tform:device_id=0001 . I had issues with the system going in endless reboots when trying to install the client if I didn ' t does this. Snapshot the VM again so you had a clean version without XenServer Tools in case you need into roll bac

grouped by enclosing units, and the analysis of memory leaks mainly uses the functions of the "Heap histogram" and oql tags. The former can find the object with the largest total capacity in memory. The latter is a standard object query language that uses SQL-like syntax to query statistics on objects in memory.Vi. Jstack:java Stack Trace ToolThe Jstack command is used to generate a thread snapshot of the current moment of the virtual machine. The thread snapshot is the collection of method sta

First install VMware in WindowsInstall Linux with VMware ( many online tutorials are not mentioned here )Click Install VMware Tools in VMwareIn this case, there is a VMware Tools installation package in the/dev/cdrom directoryMount to another directory mount/dev/cdrom/mntIn the/MNT directory there will be a tar.gz compressed package, extracted to another directoryGo to the unpacked directory and execute the

Environment: VMware8.0 Virtual Machine ubuntu:12.04After you have just installed Ubuntu, the screen cannot be displayed in full screen at this time:1. Installing VMware ToolsSteps:1.1 After entering the Ubuntu system, click on "VM", "Install VMware Tools" on the virtual machine and go back to the desktop to see a VMware ToolsCDROM icon.1.2 Double click to open, copy "vnwaretools-8.8.0-471268.tar.gz" to/home/liuqin/directory. Unzip with the command "TA

JSTAT:JVM Statistics Monitoring Tool The Jstat command monitors various runtime state information for the JVM virtual machine, including memory status, garbage collection, loading of classes, and so on. Jstat command format: jstat [option Vmid [interval] [count]] Jstat command Examples Command: JSTAT-GC 1203 500 3 Command explanation: Check the status of garbage collection with process ID 1203 every 500 milliseconds, query 3 times Command options Options Role

When it comes to locating the system, we often need to understand and analyze the runtime state of the JVM. What should be the starting point? The answer is to start with the data. The data here include: GC logs, exception stacks, thread snapshots (threaddump), heap dump snapshots (heapdump), and so on. The JDK is built with a wealth of virtual machine monitoring and analysis tools to use. Can make our trouble shooting more with less. Oracle Hotspot