question on DR

Unanswered Question
May 7th, 2008
User Badges:


Hi Friends,


As everybody know the DR election process is like the highest router id will be the DR am i right?


Then what is the router id any body can give right info.



Regards,

Naidu.


  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4 (2 ratings)
Loading.
srue Wed, 05/07/2008 - 10:38
User Badges:
  • Blue, 1500 points or more

http://www.cisco.com/warp/public/104/1.html#t21


"The router with the highest OSPF priority on a segment will become the DR for that segment. The same process is repeated for the BDR. In case of a tie, the router with the highest RID will win."

sundar.palaniappan Wed, 05/07/2008 - 10:49
User Badges:
  • Green, 3000 points or more

Naidu,


The default OSPF priority of an interface is '1'. Hence, if the priority wasn't changed on any of the router interfaces in the multi-access segment then the router with the highest RID would be elected DR for that segment. Just to let you know you can set the interface priority to '0' if you don't want a router to become a DR under any circumstance.


HTH


Sundar

ilnaiduccna Wed, 05/07/2008 - 20:42
User Badges:


Sundar,


As you told how i should proceed to change router int priority, what are the commands from starting can you give.


Regards,

Naidu.

soray Wed, 05/07/2008 - 10:51
User Badges:

Hello Naidu -


The highest IP address on the router will be the assigned router ID. With that being said. If the router have a loopback address assigned. Then the loopback address will be the router ID. If there are more than one loopback on the router,then the highest loopback address will be the Router's ID. You can also assign a RID under the OSPF process.


I hope I haven't confused you.


soray

ilnaiduccna Wed, 05/07/2008 - 20:30
User Badges:


Hi,


Thanks to both Sundar & Soray for their quick responce and good info on my conversation, it help out me.



REgards,

Naidu.

Actions

This Discussion