Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

OSPF state change

Hi

What would be the reason when ospf state changes from extrat to init frequently.                  

Everyone's tags (2)
1 REPLY
Hall of Fame Super Silver

OSPF state change

Hello Hemakumar,

the init state is theone of the first states in OSPF neighbor state machine.

Init

This state specifies that the router has received a hello packet from       its neighbor, but the receiving router's ID was not included in the hello       packet. When a router receives a hello packet from a neighbor, it should list       the sender's router ID in its hello packet as an acknowledgment that it       received a valid hello packet.

see

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0e.shtml#init

Regressing to INIT state means the local node does not see its own Router-id listed in the neighbor originated Hello.

If you can access the neighbor device you should check that router log to see if the interface has flapped and what kind of OSPF neighbor change has happened.

For troubleshooting problems in OSPF adjacency formation you can use

debug ip ospf adj

It should provide enough information to understand what is going wrong.

Hope to help

Giuseppe

296
Views
2
Helpful
1
Replies
CreatePlease login to create content