答复: mboned: RE: [magma] suggestion for simplifying IGMPV3/MLDV2 to discard EXC LUDEmode

1  I agree with Stig that EXCLUDE mode is kept for ASM, to say precisely, be
kept for (*,G)join on the host side. 
That is expressed by EXCLUDE<NULL> in the IGMPv3.  And there is another
alternative to represent the (*.G)join as an 
extension for INCLUDE mode, i.g., INCLUDE<ALL>. Then it is possible that
EXCLUDE mode not supported by IGMP3 host. 
But for compatibility reason, EXCLUDE <NULL> is prefered.

2 On the router part, there is also a filter mode definition in igmpv3 to
optimize the state description within the router. 
Without the EXCLUDE (S, G) report, there is little need to maintain
router-filter-mode. The judgement is easier to take 
by the router and no complex mode-switching is required.
    
3  As Marshall mentioned, if lite version is a feasible choice, I agree that
new implemention should not introduce interoperation problem. 

Thanks
Hui Liu

> -----邮件原件-----
> 发件人: [email protected] 
> [mailto:[email protected]] 代表 Marshall Eubanks
> 发送时间: 2006年6月9日 10:29
> 收件人: Hitoshi Asaeda
> 抄送: [email protected]; [email protected]; [email protected]
> 主题: Re: mboned: RE: [magma] suggestion for simplifying 
> IGMPV3/MLDV2 to discard EXCLUDEmode
> 
> I think that the way to do this might be to create a profile 
> for "IGMPv3 lite" which does not do (S,G) excludes for ASM.
> 
> Clearly, as Dave Thaler said at the last IETF, anything 
> that's done has to interoperate with equipment that implement 
> the full IGMPv3. I worry that if nothing is done here, there 
> will emerge a range of partial implementations, which may not 
> all interoperate.
> 
> Regards
> Marshall
> 
> On Jun 8, 2006, at 9:39 PM, Hitoshi Asaeda wrote:
> 
> >> But, as I said, I'm not necessarily seeing implementations follow 
> >> those rules.
> >
> > IGMPv3/MLDv2 host-side implementations included in KAME support all 
> > conditions (INCLUDE/EXCLUDE and all state tranditions) mentioned in 
> > these specs.
> > I'm sure it is easy to support only INCLUDE mode, though.
> > --
> > Hitoshi Asaeda
> > _______________________________________________________________
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