Re: draft-kou-ospf-immediately-replying-hello-00.txt

[Acee Lindem <[e-mail]>]

Hi Zengjie,

Zengjie Kou wrote:

>Hi,Acee,
>    If a router interface whose role is changed(e.g.DR goes down), the router will notify all routers about the change by immediate hello.
>  
>
This is only when the DR/BDR knows that it is going down or the case 
where the router
priority is set to 0.

For a router becoming DR/BDR, all the routers should elect the same DR/BDR
so I don't see how it helps.

Thanks,
Acee

> After all router get the change, election will be reprocessed. In contrast to normal hello, immediate hello avoid the backupSeen.
> Namely, improving convergence.
>
>Thanks a lot,
>Zengjie
>
>----- Original Message ----- 
>From: "Acee Lindem" <[e-mail]>
>To: <[e-mail]>
>Sent: Saturday, February 18, 2006 5:17 AM
>Subject: draft-kou-ospf-immediately-replying-hello-00.txt
>
>
>  
>
>>Hi Zengjie,
>>
>>Under what situations does having the router who changed to/from
>>DR/BDR improve convergence (section 6.2)? Since DR/BDR election
>>is a distributed algorithm dependent on the calculating routers state, it
>>seems this won't help in all that many cases.
>>
>>Thanks,
>>Acee
>>    
>>
>
>  
>