Specifications

area virtual-link Configuring OSPF
Enterasys Matrix N Standalone (NSA) Series Configuration Guide 21-35
Defaults
Ifdefault‐information‐originateisnotspecified,nodefaulttypewillbegenerated.
Mode
Routercommand,Routerconfiguration:Matrix>Router(config‐router)#
Usage
AnNSSAallowssomeexternalroutesrepresentedbyexternalLinkStateAdvertisements(LSAs)
tobeimportedintoit.Thisisincontrasttoastubareathatdoesnotallowanyexternalroutes.
ExternalroutesthatarenotimportedintoanNSSAcanberepresentedbymeansofadefault
route.
ThisconfigurationisusedwhenanOSPFinternetworkisconnectedtomultiplenon‐OSPF
routingdomains.
The“no”formofthiscommandchangestheNSSAbacktoaplainarea.
Example
Thisexampleshowshowtoconfigurearea10asanNSSAarea:
Matrix>Router(config)#router ospf 1
Matrix>Router(config-router)#area 10 nssa default-information-originate
area virtual-link
UsethiscommandtodefineanOSPFvirtuallink,whichrepresentsalogicalconnectionbetween
thebackboneandanon‐backboneOSPFarea.
Syntax
area area-id virtual-link ip-address
Theoptionsforusingthissyntaxare:
area area-id virtual-link ip-address authentication-key key
area area-id virtual-link ip-address dead-interval seconds
area area-id virtual-link ip-address hello-interval seconds
area area-id virtual-link ip-address retransmit-interval seconds
area area-id virtual-link ip-address transmit-delay seconds
no area area-id virtual-link ip-address authentication-key key
no area area-id virtual-link ip-address dead-interval seconds
no area area-id virtual-link ip-address hello-interval seconds
no area area-id virtual-link ip-address retransmit-interval seconds
no area
area-id virtual-link ip-address transmit-delay seconds
Parameters
area‐id Specifiesthetransitareaforthevirtuallink.Validvaluesaredecimal
valuesorIPaddresses.Atransitareaisanareathroughwhichavirtual
linkisestablished.
ip‐address SpecifiestheIPaddressoftheABR.Avirtuallinkisestablishedfrom
theABR,wherevirtuallinkconfigurationis
takingplace.