Understanding Transparent Web Cache Balancing (TWCB) faildetect
23-6 Transparent Web Cache Balancing Configuration
Mode
Routercommand,CacheServerConfigurationmode:Matrix(rw)‐>Router(config ‐twcb‐cache)#.
Usage
Theapplicationmethoddefaultstoacheckofserviceavailabilityonport80.Thischeckcanbe
overriddenbytheweb‐cachegroupconfigurationofhttp‐portusingthehttp‐portcommand.
Example
Thisexamplesetsthefailuredetectiontypetothepingmethodforcacheserver186.89.10.51:
Matrix(rw)->Router(config)#ip twcb wcserverfarm s1Server
Matrix(rw)->Router(config-twcb-wcsfarm)#cache 186.89.10.51
Matrix(rw)->Router(config-twcb-cache)#faildetect type ping
faildetect
UsethiscommandtospecifytheTWCBcacheserverupordownstatusdetectionmethod
parametervalues.
Syntax
faildetect [ping-int seconds] [ping-retries number] [app-int seconds
app-retries number]
Parameters
Defaults
Ifnoparameterisspecified,allparametersremainunchanged.
Mode
Routercommand,CacheServerConfigurationmode:Matrix(rw)‐>Router(config ‐twcb‐cache)#.
Example
Thisexamplesetsthefailuredetectiontypetothepingmethodforcacheserver186.89.10.51and
setsthepingintervalto7andthenumberofpingretriesto3:
Matrix(rw)->Router(config)#ip twcb wcserverfarm s1Server
Matrix(rw)->Router(config-twcb-wcsfarm)#cache 186.89.10.51
Matrix(rw)->Router(config-twcb-cache)#faildetect type ping
Matrix(rw)->Router(config-twcb-cache)#faildetect ping-int 7 ping-retries 3
ping‐intseconds (Optional)Specifiestheintervalbetweenpingsinseconds.Valuesrange
from1to3600.Defaultvalueof5.
ping‐retriesnumber (Optional)Specifiesthenumberofpingretriesinsecondsbefore
declaringthecacheserverdown.Valuesrangefrom1to255.Default
valueof4.
app‐intseconds (Optional)
Specifiestheintervalbetweenappretriesinseconds.Values
rangefrom1‐3600.Defaultvalueof15.
app‐retriesnumber (Optional)Specifiesthenumberofretriesbeforedeclaringthecache
serverdown.Valuesrange of1to255.Defaultvalueof4.
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