Cheatography
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Basic ConfigurationRouter(config)# hostname R1
| set hostname of Router | Router(config)# no ip domain-lookup
| disable dns lookup | Router(config)# enable secret class
| set password for privileged EXEC mode | Router(config-line)# password cisco
| sets console password | Router(config-line)# login
| enables login | Router(config)# copy run start
| copies running configuration to startup configuration |
TopologyTopology for 8.2.4.5 and 10.2.2.3 Verify OSPFRouter# show ip ospf
| shows all ospf information | Router# show ip ospf neighbor
| shows ospf neighbor routers | Router# show ip route ospf
| verify ospf networks | Router# show ip protocols
| verify ospf configuration | Router# show ip ospf interface
| shows summary of OSPF-enabled interfaces | Router# show ip ospf interface F0/0
| shows ospf information about that interface |
For OSPFv3 add ipv6 to the command: Router(config)# show ipv6 route ospf | | Configure OSPFRouter(config)# router ospf 1
| enable ospf with specific process id | Router(config-router)# network 192.168.1.0 0.0.0.255 area 0
| configure network with area id 0 | Router(config-router)# router-id 1.1.1.1
| set router id manually | Router(config-router)# auto-cost reference-bandwith 10000
| change default reference bandwith | Router(config)# clear ip ospf process
| clears ospf to refresh everything (f.e after set router-id) | Router(config)# passive-interface F0/0
| routing updates won't send on that interface | Router(config)# no-passive-interface F0/0
| router will send OSPF routing updates on that interface | Router(config-if)# ip ospf cost 1565
| set cost on a interface | Router(config-if)# ip ospf priority 255
| configure interface with ospf priority | Router(config-if)# ip ospf priority 0
| router can not be become DR or BDR |
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