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30 Cards in this Set
- Front
- Back
Router(config)#router ospf 123
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Starts OSPF process 123. The process ID is any positive integer value between 1 and 65535. The process ID is not related to the OSPF area. The process ID merely distinguishes one process from another within the device
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Router(config-router)#network 17.16.10.0.0 0.0.0.255 area 0
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OSPF advertises interfaces, not networks. Uses the wildcard mask to determine which itnerfaces to advertise. Read this line to say "Any interface with an address of 172.16.10.x is to be put into area 0."
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Router(config=router)#log-adjacency-changes detail
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Configures the router to send a syslog message when there is a change of state between OSPF neighbors
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Router(config)#interface loopback 0
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Creates a virtual interface named loopback -, and then moves the router to interface configuration mode.
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router(config-router)#router-id 10.1.1.1
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Sets the router ID to 10.1.1.1
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Router(config-if)#ip ospf priority 50
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Changes the OSPF interface priority to 50.
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Router(config-if)#bandwidth 128
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If you change the bandwidth, OSPF recalculates the cost of the link
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Router(config-if)#ip ospf cost 1564
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Changes the cost to a value of 1564
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Router(config-router)#area 0 authentication
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Enables simple authentication; password will be sent in clear text
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Router(config-if)#ip ospf authentication-key fred
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Sets key (password)to fred
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Router(config-router)#area 0 authentication message-digest
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Enables authentication with MD5 password encryption
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Router(config-if)#ip ospf message-digest-key 1 md5 fred
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1 is the key.id this value must be the same as that of your neighboring router. md5 indicates that the MD5 hash algorithm will be used
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router(config-if)#ip ospf hello-interval timer 20
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Changes the Hello Interval timer to 20 seconds.
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Router(config-if)#ospf dead-interval 80
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Changes the dead interval timer to 80 seconds.
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Router(config-router)#default-information originate
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Sets the default route to be propagated to all OSPF routers.
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Router(config-router)#default-information originate always
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The always option propagates a default "quad=zero" route even if one is not configured on this router.
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Router#show ip ospf interface
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Displays OSPF info as it relates to all interfaces
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Router#show ip ospf interface
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Displays OSPF info as it relates to all interfaces
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show ip ospf border-routers
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Displays border and boundary router information
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Router#show ip ospf neighbor
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lists all ospf neighbors and their states
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Router#show ip ospf neighbor detail
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displays a detailed list of neighbors
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Router#show ip ospf database
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displays contents of the OSPF database
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Router#show ip ospf database nssa-external
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Displays NSSA external link states
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Router#clear ip route *
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Clears entire routing table.
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Router#clear ip route a.b.c.d
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clears specific roue to network a.b.c.d
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Router#clear ip opsf counters
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resets ospf counters
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router#clear ip ospf process
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Resets entire ospf process, forcing ospf to recreate neighbors, database, and routing table
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Router#debug ip ospf events
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Displays all ospf events
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Router#debug ip ospf adjacency
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Displays various OSPF states and DR/BDR election between adjacent routers
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Router#debug ip ospf packets
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Displays OSPF packets
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