Switch User Manual

area stub
25-16 OSPFv3 Configuration
Mode
RouterOSPFv3configuration:C3(su)‐>router(Config‐router)#
Usage
Addressrangescontroltheadvertisementofroutesacrossareaboundaries.Routinginformation
issummarized,oraggregated,atareaboundaries.Externaltothearea,atmostasinglerouteis
advertised(viaaninter‐area‐prefix‐LSA)foreachaddressrange.Arouteisadvertisedifandonly
iftheaddressrange’s
statusissettoadvertise.Thedefaultconditionistoadvertise.
ForABRsconfiguredforNSSA,routesummarization/aggregationcanbeimplementedbasedon
LSAtype—eithersummaryLSAs(specifiedwiththesummarylinkparameter),orNSSAexternal
LSAsType7(specifiedwith thenssaexternallinkparam eter).
Youcanconfiguremultipleaddress
rangeswiththiscommand.
Usethenoformofthiscommandtoremoveaconfiguredaddressrange.
Example
Thisexampleconfiguresanaddressrangetobeconsolidatedandadvertisedbasedonsummary
LSAs.
C3(su)->router(Config-router)# area 20 range 3FFe:501::/32 summarylink
area stub
ThiscommandcreatesastubareaforthespecifiedareaID.
Syntax
area areaid stub
no area areaid stub
Parameters
Defaults
None.
Mode
RouterOSPFv3configuration:C3(su)‐>router(Config‐router)#
Usage
AstubareaischaracterizedbythefactthatASexternalLSAsarenotpropagatedintothearea.
RemovingASexternalLSAsandsummaryLSAscansignificantlyreducethelinkstatedatabaseof
routerswithinthestubarea.
Usethenoformofthecommandtodeleteastubarea.
areaid Specifies
theareaIDinIPaddressformat(dotted‐quad)orasadecimal
value.