Show Menu
Cheatography

Basic Config­uration

Router­(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

Topology

Topology for 8.2.4.5 and 10.2.2.3

Verify OSPF

Router# 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 OSPF

Router­(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

Topology

Topology for 10.1.1.13
 

Metadata

  • Languages:
  • Published: 5th February, 2020

Comments

No comments yet. Add yours below!

Add a Comment

Your Comment

Please enter your name.

    Please enter your email address

      Please enter your Comment.

          Related Cheat Sheets

          Single-Area OSPF Cheat Sheet

          More Cheat Sheets by marcx28