Re: Update to OSPF Hello procedure[draft-kou-ospf-immediately-replying-hello-00.txt]

[Don Goodspeed <[e-mail]>]

Only if everyone of the attached network implement this mechanism,
otherwise how could it.

A shared hub or switch goes down then comes back up.  Two routers
implementing the mechanism have a lower priority than a 3rd router
that has a higher priority and had been the DR.  The two lower priority
routers "ack" each other and go to ExStart then Full and one of the
two is elected DR, churning the network LSAs.

Am I missing something here?

-don

-----Original Message-----
From: [e-mail]
[mailto:[e-mail]] On Behalf Of Zengjie Kou
Sent: Thursday, December 29, 2005 6:40 PM
To: Mailing List
Subject: Re: Update to OSPF Hello
procedure[draft-kou-ospf-immediately-replying-hello-00.txt]

Hi,Manav
    I don't find any harm except a few additional hello packets before the
state reaches "ExStart".

    The Immediate Hello do not affect which router will be elected DR. It
only expedite the election.

thanks
kou.

----- Original Message ----- 
From: "Manav Bhatia" <[e-mail]>
To: <[e-mail]>
Sent: Thursday, December 29, 2005 7:27 PM
Subject: Re: Update to OSPF Hello
procedure[draft-kou-ospf-immediately-replying-hello-00.txt]


> So whats the harm in this? 
> 
> If you wanted a particular router to become the DR then you would have
given it a higher priority.
> The fact that you havent done that implies that you dont really care which
router becomes the DR.
> 
> Manav
> --- Nitin Kakkar <[e-mail]> wrote:
> 
>> Suppose there are n routers on a Link and all of them come up almost
>> simultaneously.
>> 
>> Seems like the routers which were fractionally faster to send hello will
be
>> picked for DR/BDR election !!!
>> 
>>  
>> 
>> May be you can think of  immediately replying to hello packet "Only when
DR
>> is already elected on the link".
>> 
>>  
>> 
>> Rgds
>> 
>> Nitin
>> 
>>  
>> 
>> -----Original Message-----
>> From: Mailing List [mailto:[e-mail]] On Behalf Of
>> Kouzengjie
>> Sent: Thursday, December 29, 2005 7:51 AM
>> To: [e-mail]
>> Subject: Update to OSPF Hello
>> procedure[draft-kou-ospf-immediately-replying-hello-00.txt]
>> 
>>  
>> 
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> The draft can be found here:
>>
http://www.ietf.org/internet-drafts/draft-kou-ospf-immediately-replying-hell
>> o-00.txt
>> 
>>  
>> 
>>  This memo documents an extension of the OSPF protocol to reach 
>>    "ExStart" state more quickly. Currently, the OSPF behavior requires 
>>    the Hello Packet to be sent between the neighbors every 
>>    HelloInterval. This document proposes to generalize the use of 
>>    Immediately Replying Hello which could reduce the time required to 
>>    reach the OSPF "ExStart" state and  expedite the routing table 
>>    convergence.   
>> 
>> 
> 
> 
> 
> 
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