Cisco® OSPF Command and Configuration Handbook by William R. Parkhurst

By William R. Parkhurst

As probably the most predominantly deployed inside Gateway Protocols, Open Shortest direction First (OSPF) calls for a wealth of information at the a part of internetworking pros operating with it each day. regrettably, publicly on hand documentation at the OSPF command set varies from being too skinny on insurance to being too difficult at the required apparatus had to try what the documentation covers. Cisco OSPF Command and Configuration guide is a transparent, concise, and whole resource of documentation for all Cisco IOS(r) software program OSPF instructions. how you use this publication depends upon your goals. while you're getting ready for the CCIE written and lab assessments, then this ebook can be utilized as a laboratory advisor to benefit the aim and correct use of each OSPF command. while you are a community dressmaker, then this e-book can be utilized as a prepared reference for any OSPF command.Cisco OSPF Command and Configuration guide presents instance situations that reveal the right kind use of each OSPF command that may be carried out on a minimal variety of routers. it will enable you study each one command with out requiring an in depth and costly lab configuration. The situations sincerely current the aim and use of every command. the various examples lead you into universal non-working occasions with the intention to make stronger the certainty of the operation of the actual OSPF command. This ebook is a part of the Cisco CCIE expert improvement sequence, which bargains expert-level guideline on community layout, deployment, and help methodologies to assist networking pros deal with advanced networks and get ready for CCIE tests.

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Extra info for Cisco® OSPF Command and Configuration Handbook

Example text

0 ! 0 ! 252 ! 0 no auto-summary Router A is advertising Loopback 0 as an OSPF type 5 external route because this route was injected into OSPF through redistribution. Routers A and B are also learning the redistributed RIP routes as external type 5 OSPF routes. 4 is directly connected, Serial1 Router C is learning the network redistributed by Router A as an OSPF external type 5 route. 4 is directly connected, Serial0 Now modify the OSPF configurations on Routers B and C in order to create the NSSA.

Checksum Sum 0x20790 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Area 1 Number of interfaces in this area is 1 It is a NSSA area Perform type-7/type-5 LSA translation Area has no authentication SPF algorithm executed 22 times Area ranges are Number of LSA 7. Checksum Sum 0x26D1D Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Now inspect the routing tables on Routers A, B, and C to view the effect of configuring Area 1 as an NSSA. 4 is directly connected, Serial1 The redistributed RIP routes have been converted from OSPF E2 routes to OSPF N2 routes.

With MD5 authentication, you can configure a new key and password on a link while leaving the old key and password in place. The old key and password will continue to be used until the new key and password are configured on the other end of the link. Modify the key and password on the link between Routers A and B. Add a new key and password on Router A in order to observe the behavior when the new key and password have only been configured on one end of the link. 252 no ip directed-broadcast ip ospf message-digest-key 2 md5 ciscoab ip ospf message-digest-key 4 md5 cisconew clockrate 64000 Verify that the OSPF neighbor relationship between Routers A and B is still active.

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