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18.4. 故​​​​​​​障​​​​​​​解​​​​​​​除​​​​​​​工​​​​​​​具​​​​​​​

本​​​​​​​部​​​​​​​分​​​​​​​总​​​​​​​结​​​​​​​了​​​​​​​系​​​​​​​统​​​​​​​管​​​​​​​理​​​​​​​员​​​​​​​程​​​​​​​序​​​​​​​、​​​​​​​网​​​​​​​络​​​​​​​工​​​​​​​具​​​​​​​和​​​​​​​高​​​​​​​级​​​​​​​调​​​​​​​试​​​​​​​工​​​​​​​具​​​​​​​（关​​​​​​​于​​​​​​​如​​​​​​​何​​​​​​​使​​​​​​​用​​​​​​​这​​​​​​​些​​​​​​​工​​​​​​​具​​​​​​​来​​​​​​​配​​​​​​​置​​​​​​​红​​​​​​​帽​​​​​​​虚​​​​​​​拟​​​​​​​化​​​​​​​服​​​​​​​务​​​​​​​的​​​​​​​更​​​​​​​多​​​​​​​信​​​​​​​息​​​​​​​，请​​​​​​​参​​​​​​​考​​​​​​​相​​​​​​​关​​​​​​​的​​​​​​​配​​​​​​​置​​​​​​​文​​​​​​​档​​​​​​​）。​​​​​​​你​​​​​​​可​​​​​​​以​​​​​​​使​​​​​​​用​​​​​​​这​​​​​​​些​​​​​​​标​​​​​​​准​​​​​​​的​​​​​​​系​​​​​​​统​​​​​​​管​​​​​​​理​​​​​​​员​​​​​​​工​​​​​​​具​​​​​​​和​​​​​​​日​​​​​​​志​​​​​​​来​​​​​​​协​​​​​​​助​​​​​​​故​​​​​​​障​​​​​​​解​​​​​​​除​​​​​​​：
  • xentop
  • xm dmesg
  • xm log
  • vmstat
  • iostat
  • lsof
你​​​​​​​可​​​​​​​以​​​​​​​使​​​​​​​用​​​​​​​这​​​​​​​些​​​​​​​标​​​​​​​准​​​​​​​的​​​​​​​系​​​​​​​统​​​​​​​管​​​​​​​理​​​​​​​员​​​​​​​工​​​​​​​具​​​​​​​和​​​​​​​日​​​​​​​志​​​​​​​来​​​​​​​协​​​​​​​助​​​​​​​故​​​​​​​障​​​​​​​解​​​​​​​除​​​​​​​：
  • XenOprofile
  • systemTap
  • crash
  • sysrq
  • sysrq t
  • sysrq w
你​​​​​​​可​​​​​​​以​​​​​​​使​​​​​​​用​​​​​​​这​​​​​​​些​​​​​​​网​​​​​​​络​​​​​​​工​​​​​​​具​​​​​​​来​​​​​​​协​​​​​​​助​​​​​​​故​​​​​​​障​​​​​​​解​​​​​​​除​​​​​​​：
  • ifconfig
  • tcpdump
  • brctl
brctl 是​​​​​​​一​​​​​​​个​​​​​​​在​​​​​​​虚​​​​​​​拟​​​​​​​化​​​​​​​ Linux 内​​​​​​​核​​​​​​​里​​​​​​​检​​​​​​​查​​​​​​​和​​​​​​​配​​​​​​​置​​​​​​​以​​​​​​​太​​​​​​​网​​​​​​​桥​​​​​​​配​​​​​​​置​​​​​​​的​​​​​​​网​​​​​​​络​​​​​​​工​​​​​​​具​​​​​​​。​​​​​​​在​​​​​​​执​​​​​​​行​​​​​​​这​​​​​​​些​​​​​​​示​​​​​​​例​​​​​​​命​​​​​​​令​​​​​​​时​​​​​​​，你​​​​​​​必​​​​​​​须​​​​​​​拥​​​​​​​有​​​​​​​根​​​​​​​用​​​​​​​户​​​​​​​权​​​​​​​限​​​​​​​： 
# brctl show 

bridge-name    bridge-id          STP  enabled  interfaces  
-----------------------------------------------------------------------------
xenbr0             8000.feffffff       no        vif13.0
xenbr1             8000.ffffefff       yes       pddummy0
xenbr2             8000.ffffffef       no        vif0.0

# brctl showmacs xenbr0

port-no           mac-addr                  local?       ageing timer

1                 fe:ff:ff:ff:ff:           yes            0.00
2                 fe:ff:ff:fe:ff:           yes            0.00


# brctl showstp xenbr0

xenbr0 

bridge-id              8000.fefffffffff

designated-root        8000.fefffffffff

root-port              0                   path-cost             0

max-age                20.00               bridge-max-age        20.00

hello-time             2.00                bridge-hello-time     2.00

forward-delay          0.00                bridge-forward-delay  0.00

ageing-time            300.01

hello-timer            1.43                tcn-timer             0.00

topology-change-timer  0.00                gc-timer              0.02