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Cisco CCNA Routing and Switching ICND2 200-101 Official Cert Guide by Wendell Odom

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OSPF Interface Troubleshooting

ImageLesson 4: Troubleshooting OSPF

OSPF has the same basic requirements as EIGRP for interfaces, with a few exceptions. First, EIGRP routers need to use the same autonomous system number (ASN) as their neighboring routers, as configured in the router eigrp asn global configuration command. OSPF routers can use any process ID on the router ospf process-id command, with no need to match their neighbors. Second, OSPF requires that the interfaces connected to the same subnet be assigned to the same OSPF area, whereas EIGRP has no concept of areas.

Example 11-5 shows a mostly working OSPF internetwork, again based on Figure ...

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