At 4:06 PM +0000 10/3/02, [EMAIL PROTECTED] wrote:
>Hello friends,
>
> I have a question for you, maybe you can help me.......
>
>
> Suppose that I have an Ethernet segment with some routers
>speaking OSPF, one of them is the DR and other is the BDR. Suppose that I
>add a new router to the Ethernet segment. I know that this doesn't start a
>new ellection of DR or BDR process, (the normal way is that when the DR
>fails, the BDR takes its place and one new BDR is ellected). Now suppose
>that I want the new router be the DR... How can I force this?? I know that
>I can force the priority in the election process (ip ospf priority
>command), but I am not sure that changing this priority will start a new
>election..... Must I shut down the DR and BDR routers in order to force a
>new DR and BDR?? I don't think so....
Yes you must both:
stop OSPF on the existing DR and BDR
bring up the new desired DR
if there is a router with a better priority still on, it may become DR.
the only certain way to make a router interface DR is to have it the
only active router
bring up the other routers.
ISIS does things a different way. Essentially, it doesn't have the
BDR concept, and you can force a particular router to be DR
equivalent.
These are some of the fundamental design differences between OSPF and ISIS.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=54818&t=54810
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