Subject: Re: [mobile-ip] Where the 50msec comes from in MIPv6?

From: Greg Daley <[email-masked]>
Date: Wed, 16 Apr 2003 09:35:31 +1000

Hi Mr Lee,

I'm sorry about the lateness of the reply.

The minimum values for MinRtrAdvInterval and
MaxRtrAdvInterval specified by the latest MIPv6
drafts are 30ms and 70ms, respectively.

Unsolicited RA's are distributed randmomly
between MinRtrAdvInterval and MaxRtrAdvInterval.

The mean interval between unsolicited RA's is
therefore 50ms.

    I_mean = ( I_min + I_max ) / 2

It should be noted that timing mechanisms in some
systems will not be able to provide scheduling
granularity as low as 1ms, and so these
advertisements may be aligned on scheduling bucket
boundaries.

Greg Daley

[email-masked] wrote:
> Hi.
>  
> I'm wondering where the 50 msec coms from in MIPv6.
> In draft-ietf-mobileip-ipv6-XX.txt, it says:
>  
>     - MinRtrAdvInterval 0.03 seconds
>  
>     If the case where the minimum intervals and delays are used, the 
> mean time between
>     unsolicited multicast router advertisements is 50ms.
>  
> Where this 50ms comes from?
> How we can calcurate it?
>  
> Thanks.
>  
>  
> ---------------------------------------------------------
> ???
> ??????, ETRI
>  
> Jun Seob Lee
> ETRI, Protocol Engineering Center
> 161 Kajong-Dong,Yusong-Gu, Daejeon, 305-350, Korea
> Phone  : +82-42-860-3859,  FAX: +82-42-861-5404
> E-mail : [email-masked] <mailto:[email-masked]@etri.re.kr>
> ---------------------------------------------------------
>