User's Manual Part 2

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38JadeOSUserManual
EnablingOSPFrequiresthatyoucreateanOSPFrouterIDwhichistheonlyidentifier
inanASsystemandareaIDwhichspecifytherangeofroutingprocess.
IftherouterIDisnotconfigured,theloopbackinterfaceIPwillbetakenasrouterID.
Ifthereisnoloopbackinte rface,systemwillselectamaximumIPaddressfromallof
interfaceIPs.
ToconfigurearouterID,completethefollowingcommand:
(JadeOS) (config)#router ospf
(JadeOS) (config-router)#ospf router-id <IP>
ToconfigureaareaID,usethefollowingcommand:
（JadeOS）(config)# router ospf
（JadeOS）(config-router)# area <area id> <parameter>
Note:PleaserefertoJadeOSCommandManualformoreareaconfigurationparameter.
6.7.3ConfiguringOSPFInterfaceParameters
JadeOSallowsyoutoaltercertaininterface‐specificOSPFparametersasneeded.You
are not required to alter any of these parameters, but some interface parameters
mustbeconsistentacrossallroutersinanattachednetwork.Therefore,besurethat
ifyoudoconfigureanyofthesepar ameters,theconfigurationsforallroutersonyour
networkhavecompatiblevalues.
To specify inte rface parameters as needed for your network, use the any of the
commandslistedintable6‐1:
Command Purpose
ip ospf cost <value>
Explicitlyspecifythecostofsendingapack etonan
OSPFinterface.
ip ospf dead-interval
<value>
Setthenumberofsecondsthatadevice'shello
packetsmustnothavebeenseenbeforeits
neighborsdeclaretheOSPFrouterdown.
ip ospf
hello-interval
<value>
Specifythelengthoftimebetweenthehellopack‐
etsthattheCiscoIOSsoftwaresendsonanOSPF
interface.
ip ospf message-digest-key
<value> <passwd>
EnableOSPFMD5authentication.
ip ospf priority <value>
SetprioritytohelpdeterminetheOSPFdesignated
routerforanetwork.
ip ospf retransmit-interval
<value>
Specifythenumberofsecondsbetweenlinkstate
advertisementretransmissionsforadjacenciesbe‐
longingtoanOSPFinterface.
ip ospf trans-
Settheestimatednumberofsecondsittakesto