Table of Contents

Introduction.


1. OSPF Process Configuration Commands.
router ospf process-id. router ospf process-id vrf name

2. OSPF Area Commands.
area area-id authentication. area area-id authentication message-digest. area area-id default-cost cost. area area-id nssa. area area-id nssa default-information-originate. area area-id nssa no-redistribution. area area-id nssa no-summary. area area-id range ip-address mask. area area-id range ip-address mask advertise. area area-id range ip-address mask not-advertise. area area-id stub. area area-id stub no-summary. area transit-area-id virtual-link router-id. area transit-area-id virtual-link router-id authentication . area transit-area-id virtual-link router-id authentication message-digest. area transit-area-id virtual-link router-id authentication null. area transit-area-id virtual-link router-id authentication-key password. area transit-area-id virtual-link router-id dead-interval seconds. area transit-area-id virtual-link router-id hello-interval seconds. area transit-area-id virtual-link router-id message-digest-key key-id md5 . area transit-area-id virtual-link router-id retransmit-interval seconds. area transit-area-id virtual-link router-id transmit-delay seconds

3. Auto Cost.
auto-cost reference-bandwidth bandwidth

4. Default Route Generation.
default-information originate. default-information originate always. default-information originate metric cost. default-information originate always metric cost. default-information originate metric-type type. default-information originate always metric-type type. default-information originate route-map route-map-name

5. Setting the Default Metric for Redistributed Protocols.
default-metric cost

6. Administrative Distance.
distance administrative-distance. distance administrative-distance source-ip-address source-ip-mask. distance administrative-distance source-ip-address source-ip-mask . distance ospf external administrative-distance. distance ospf inter-area administrative-distance. distance ospf intra-area administrative-distance

7. Filtering Routes with Distribute Lists.
distribute-list access-list-number in. distribute-list access-list-number in interface-type interface-number. distribute-list access-list-number out. distribute-list access-list-number out interface-type interface-number. distribute-list access-list-number out routing-process. distribute-list access-list-name in. distribute-list access-list-name in interface-type interface-number. distribute-list access-list-name out. distribute-list access-list-name out interface-type interface-number. distribute-list access-list-name out routing-process. distribute-list prefix prefix-list-name in. distribute-list prefix prefix-list-name in interface-type interface-number. distribute-list prefix prefix-list-name out. distribute-list prefix prefix-list-name out interface-type interface-number. distribute-list prefix prefix-list-name out routing-process

8. Handling of MOSPF LSAs.
ignore lsa mospf

9. Logging OSPF Neighbor Changes.
log-adjacency-changes. log adjacency-changes detail

10. Multiple Path Configuration.
maximum-paths number-of-paths

11. OSPF neighbor Commands.
neighbor ip-address. neighbor ip-address cost cost. neighbor ip-address database-filter all out. neighbor ip-address poll-interval interval. neighbor ip-address priority priority

12. OSPF network Command.
network ip-address wild-card-mask area area-id

13. Passive OSPF Interfaces.
passive-interface interface-name interface-number. passive-interface default

14. Route Redistribution
redistribute routing-process process-id. redistribute routing-process process-id metric ospf-metric. redistribute routing-process process-id metric-type metric-type. redistribute routing-process process-id subnets. redistribute routing-process process-id tag tag-value. redistribute routing-process process-id route-map route-map-name

15. Controlling the OSPF Router ID
router-id ip-address

16. Summarizing External Routes.
summary-address ip-address mask. summary-address ip-address mask not-advertise. summary-address ip-address mask tag value

17. OSPF Timers.
timers lsa-group-pacing seconds. timers spf delay interval

18. Traffic Sharing.
traffic-share min across-interfaces

19 .Interface Configuration Commands.
ip ospf authentication. ip ospf authentication authentication-key password. ip ospf authentication message-digest. ip ospf authentication null. ip ospf cost cost. ip ospf database-filter all out. ip ospf dead-interval seconds. ip ospf demand-circuit. ip ospf flood-reduction. ip ospf hello-interval seconds. ip ospf message-digest-key key-id md5 password. ip ospf mtu-ignore. ip ospf network broadcast. ip ospf network non-broadcast. ip ospf network point-to-multipoint. ip ospf network point-to-multipoint non-broadcast. ip ospf network point-to-point. ip ospf priority priority. ip ospf retransmit-interval seconds. ip ospf transmit-delay seconds

20. show Commands.
show ip ospf. show ip ospf process-id. show ip ospf border-routers. show ip ospf process-id border-routers. show ip ospf database. show ip ospf process-id database. show ip ospf database adv-router router-id. show ip ospf process-id database adv-router router-id. show ip ospf database asbr-summary. show ip ospf process-id database asbr-summary. show ip ospf database asbr-summary asbr-id. show ip ospf process-id database asbr-summary asbr-id. show ip ospf database database-summary. show ip ospf process-id database database-summary. show ip ospf database external. show ip ospf process-id database external. show ip ospf database network. show ip ospf process-id database network. show ip ospf database nssa-external. show ip ospf process-id database nssa-external. show ip ospf database router. show ip ospf process-id database router. show ip ospf database self-originate. show ip ospf process-id database self-originate. show ip ospf database summary. show ip ospf process-id database summary. show ip ospf flood-list. show ip ospf process-id flood-list. show ip ospf flood-list int-name int-number. show ip ospf process-id flood-list int-name int-number. show ip ospf interface. show ip ospf process-id interface. show ip ospf interface int-name int-number. show ip ospf process-id interface int-name int-number. show ip ospf neighbor. show ip ospf process-id neighbor. show ip ospf neighbor neighbor-id. show ip ospf process-id neighbor neighbor-id. show ip ospf neighbor int-name int-number. show ip ospf process-id neighbor int-name int-number. show ip ospf neighbor detail. show ip ospf process-id neighbor detail. show ip ospf neighbor detail neighbor-id. show ip ospf process-id neighbor detail neighbor-id. show ip ospf neighbor int-name int-number. show ip ospf process-id neighbor int-name int-number. show ip ospf request-list. show ip ospf process-id request-list. show ip ospf request-list neighbor-id. show ip ospf process-id request-list neighbor-id. show ip ospf request-list int-name int-number. show ip ospf process-id request-list int-name int-number. show ip ospf retransmission-list. show ip ospf process-id retransmission-list. show ip ospf retransmission neighbor-id. show ip ospf process-id retransmission neighbor-id. show ip ospf retransmission int-name int-number. show ip ospf process-id retransmission int-name int-number. show ip ospf summary-address. show ip ospf process-id summary-address. show ip ospf virtual-links. show ip ospf process-id virtual-links

21. debug Commands.
debug ip ospf adj. debug ip ospf events. debug ip ospf flood. debug ip ospf flood ip-access-list-number. debug ip ospf lsa-generation. debug ip ospf lsa-generation ip-access-list-number. debug ip ospf packet. debug ip ospf retransmission. debug ip ospf spf. debug ip ospf spf external. debug ip ospf spf external access-list-number. debug ip ospf spf inter. debug ip ospf spf inter access-list-number. debug ip ospf spf intra. debug ip ospf spf intra access-list-number

22. clear Commands.
clear ip ospf counters. clear ip ospf process-id counters. clear ip ospf process-id counters neighbor. clear ip ospf process-id counters neighbor int-name int-number. clear ip ospf process. clear ip ospf process-id process. clear ip ospf redistribution. clear ip ospf process-id redistribition

Index.

Promotional Information

Enterprise IP networks will typically employ the Open Shortest Path First (OSPF) protocol in one capacity or another. The documentation available for this routing protocol is covered in many different resources but there is no single source that brings every OSPF routing protocol command together in one reference as a handbook. Beyond background information, there also is little information available on its practical use and configuration. The handbook approach is unique in that at least one scenario is presented for every OSPF routing protocol configuration command. The purpose, proper use, configuration, verification, and debugging of the command is presented. Therefore, network designers and candidates for any of the Cisco® Career Certifications from CCNA® to CCIE® can use this handbook. Through the discussion of functionality and the scenario-based configuration examples, Parkhurst helps readers gain a thorough understanding of the practical side of the OSPF routing protocols.

About the Author

William R. Parkhurst, Ph.D., CCIE is the manager of the CCIE Development group at Cisco Systems(r). The CCIE Development group is responsible for all new CCIE written qualification and laboratory exams. Prior to joining the CCIE team, Bill was a Consulting Systems Engineer supporting the Sprint Operation. He first became associated with Cisco Systems while a Professor of Electrical and Computer Engineering at Wichita State University. In conjunction with Cisco Systems, WSU established the first CCIE Preparation Laboratory. Parkhurst is the author of several networking books, including Cisco BGP-4 Command and Configuration Reference, published by Cisco Press.