{"id":2159,"date":"2011-05-28T12:31:31","date_gmt":"2011-05-28T12:31:31","guid":{"rendered":"http:\/\/wiki.freeiz.com\/?p=2159"},"modified":"2016-08-09T12:08:27","modified_gmt":"2016-08-09T12:08:27","slug":"cisco-ospf-summary","status":"publish","type":"post","link":"https:\/\/wiki-see.info\/wp\/2011\/05\/28\/cisco-ospf-summary\/","title":{"rendered":"Cisco OSPF Summary"},"content":{"rendered":"

Configuring OSPF on a Cisco router<\/strong><\/span><\/a><\/span><\/p>\n

router(config)#router ospf 1
\nrouter(config-router)#network 10.130.0.0 0.0.255.255 area 130<\/span><\/code><\/p>\n

The command turns on the OSPF routing protocol with a process id of 1<\/span>.
\nThe network line must\u00a0be added to tell the router which networks will be
\nparticipating in OSPF. <\/span><\/p>\n

This command can be expanded to include stub areas<\/span> and not so stubby areas<\/span>.
\n<\/span>That is how Cisco refers to it. You can run multiple processes of<\/span> OSPF<\/span> using
\ndifferent<\/span> process ids<\/span>.<\/p>\n

Related commands:<\/span>
\nshow ip ospf neighbor
\nshow ip ospf interface<\/span><\/code><\/span><\/p>\n

Router-Id<\/span><\/strong><\/span><\/span><\/p>\n

The OSPF router-id will be, in order<\/span>:<\/span><\/p>\n

The one configured by the router-id command, if available and configured.
\nThe highest IP loopback interface when OSPF starts, if a loopback exists.
\nThe highest IP on a non-loopback interface.<\/span><\/p>\n

Objectives<\/span> :<\/span><\/p>\n

1. <\/span>Configure OSPF.<\/span> R1 <\/span><\/span>will act as an<\/span> ASBR<\/span> by redirecting a series of static routes
\ninto the OSPF network. These Routes should NOT increment their metrics as they
\npass through the network and should have an intial<\/span> OSPF cost of 200<\/span><\/span>.<\/span><\/span><\/p>\n

All routers should have a router-id<\/span> reflecting their hostname, you should be able to
\nping this router-id throughout the entire OSPF network.<\/span><\/p>\n

R1<\/span>:<\/p>\n

router ospf 1<\/span>
\n network 172.16.30.1 0.0.0.0 areaO<\/span>
\n router i.d 1.1.1.1<\/span>
\n redistribute static subnets metric 200 metric-type 2<\/span><\/p>\n

!<\/p>\n

E1<\/span> routes increase their metrics.<\/span>
\n E2 <\/span><\/span>is default and do not increment their metrics.<\/span><\/p>\n

!
\n!<\/p>\n

R2<\/span>:<\/p>\n

router ospf 1<\/span>
\nnetwork 172.16.31.2 0.0.0.0 areaO
\n router i.d 2.2.2.2<\/span><\/p>\n

!
\n!<\/p>\n

Router-id<\/span> should be set before configuring routing protocol network.<\/span>
\nIf Router-id<\/span> is set after configuring routing protocol then router interface
\nip address would take precedence.<\/span><\/p>\n

For router-id <\/span>the take precedence . run this command to clear the OSPF<\/span> process :<\/span><\/p>\n

clear ip ospf process<\/span><\/p>\n

!<\/p>\n

int loopback 1
\nip address 10.10.0.1 255.255.25.0
\n ip ospf network point-to-point<\/span><\/span><\/p>\n

Router OSPF will advertise a \/32 loopback 1 since it will see it a \/32 due to being
\na loopback interface.<\/span><\/p>\n

ip ospf network point-to-point<\/span> will see it as a real network \/24<\/p>\n","protected":false},"excerpt":{"rendered":"

Configuring OSPF on a Cisco router router(config)#router ospf 1 router(config-router)#network 10.130.0.0 0.0.255.255 area 130 The command turns on the OSPF routing protocol with a process id of 1. The network line must\u00a0be added to tell the router which networks will be participating in OSPF. This command can be expanded to include stub areas and not […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2159","post","type-post","status-publish","format-standard","hentry","category-routing-protocol"],"_links":{"self":[{"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/posts\/2159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/comments?post=2159"}],"version-history":[{"count":1,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/posts\/2159\/revisions"}],"predecessor-version":[{"id":5075,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/posts\/2159\/revisions\/5075"}],"wp:attachment":[{"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/media?parent=2159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/categories?post=2159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wiki-see.info\/wp\/wp-json\/wp\/v2\/tags?post=2159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}