Normal Behavior on the Network

If you are familiar with the network when it is fully operational, you can be more effective at troubleshooting problems that arise. To understand the normal behavior of the network, monitor the network over a long period of time. During this time you can see a pattern in the traffic flow, such as which devices users access most or when peak usage times occur.

To identify problems, you can use a baseline analysis, which is an important indicator of overall network health. A baseline serves as a useful reference of network traffic during normal operation, which you can then compare to captured network traffic while you troubleshoot network problems. A baseline analysis speeds the process of isolating network problems. By running tests on a healthy network, you compile normal data for your network. You can compare this normal data against the results that you get when the network experiences trouble.

For example, ping each node to discover how long it typically takes to receive a response from devices on your network. Capture and save each response time and you can use these baseline response times to help you troubleshoot. You can also use the show tech/show fulltech and show khi performance {buffer-pool|cpu|memory|process|pthread|slabinfo} commands to obtain baseline output for normal system behavior.

Note

Note

Depending on the hardware platform, the output of show khi performance memory command can differ.

Example

In the following example, the show khi performance memory command shows the average memory utilization at various time intervals. The show khi performance memory history command shows the VMSize utilization values in kilobytes for each process at various time intervals. After 1 hour elapses, the system stores this information in /intflash/coreFiles/slot/khi_mem_log.

Switch:1#show khi performance memory
    Slot:1Slot:1
         Used: 1609636 (KB)
         Free: 2396068 (KB)
         Current utilization: 40 %
         5-minute average utilization: 40 %
         5-minute high water mark: 40 (%)
         10-minute average utilization: 39 %
         10-minute high water mark: 39 (%)
         1-Hour average utilization: 37 %
         1-Day average utilization: 0 %
         1-Month average utilization: 0 %
         1-Year average utilization: 0 %

Switch:1#show khi performance memory history
    Slot:1
Values indicate VMSize in KB

Pid    Pname                 5-Min    10-Min   1-Hour   1-Day    1-Month  1-Year

 4762  logger                1        1        1        --       --       --
 4779  namServer             20       20       20       --       --       --
 4780  sockserv              4        4        4        --       --       --
 4782  oom95                 214      214      214      --       --       --
 4784  oom90                 214      214      214      --       --       --
 4786  imgsync.x             19       19       19       --       --       --
 4860  logServer             24       24       24       --       --       --
 4861  trcServer             18       18       18       --       --       --

--More-- (q = quit)

Switch:1#show tech

Sys Info:
---------------

General Info :

        SysDescr     : Switch (4.5.0.1_B008) (PRIVATE)
        SysName      : Switch
        SysUpTime    : 0 day(s), 00:49:06
        SysContact   : support@extremenetworks.com
        SysLocation  : 

Chassis Info:

        Chassis            : 8608
        Serial#            : SDNI86CWD018
        H/W Revision       : R0D
        H/W Config         :
        Part Number        : EC9402001-E6
        NumSlots           : 8
        NumPorts           : 80
        BaseMacAddr        : f8:73:a2:03:80:00

--More-- (q = quit)