“OSPF is a link-state based routing protocol. It is designed to be run internal to a single Autonomous System. Each OSPF router maintains an identical database describing the Autonomous System’s topology. From this database, a routing table is calculated by constructing a shortest-path tree. OSPF recalculates routes quickly in the face of topological changes, utilizing a minimum of routing protocol traffic. OSPF provides support for equal-cost multipath. An area routing capability is provided, enabling an additional level of routing protection and a reduction in routing protocol traffic.” – RFC 1247
(switch(config)#) Enable an OSPF instance:
router ospf INSTANCE [vrf NAME] switch(config-ospf)# router-id ROUTER
(switch(config-ospf)#) Configure an OSPF area:
area AREA [stub|nssa|default-metric COST] Configure external
(switch(config-ospf)#) Route redistribution and control:
redistribute <bgp|connected|static>
default-metric VALUE switch(config-ospf)# maximum-paths VALUE
(switch(config-ospf)#) Influence route choice by changing the administrative distance:
distance VALUE
(switch(config-if)#) Enable OSPF on an interface:
ip ospf PROCESS-ID area AREA
(switch(config-if)#) Configure optional OSPF interface settings:
ip ospf cost COST
ip ospf hello-interval SECONDS
ip ospf dead-interval SECONDS
ip ospf retransmit-interval SECONDS
ip ospf transit-delay SECONDS
ip ospf network <broadcast|point-to-point>
ip ospf priority VALUE
ip ospf <active|passive>
ip ospf bfd
(switch(config-if)#) Configure OSPF interface authentication:
ip ospf authentication <message-digest|simple-text|null> switch(config-if)# ip ospf authentication-key PSWD
ip ospf message-digest-key md5 <cipher|plain>text KEY
(switch(config)#)
show ip ospf [interface|neighbors]
show ip route ospf
show commands looks correct.