Re: [magma] Query on querier version in IGMPv3

Hi Bharat,

              Do not lower the querier version. Let the v2 updates's it
querier timer from v3 query or let it use it's configured query interval.
Otherwise, the reselection can happen after every General query.

Thanks,
Indranil

On Mon, Jul 19, 2010 at 10:39 AM, Bharat Joshi <bharat_joshi@infosys.com>wrote:

> Hi All,
>
>      I was re-reading RFC 3376 for handling compatibility for lower version
> of querier.
>
>      In section 7.3.1, it is mentioned that a querier configured to run in
> V3 mode
>      should lower its version when it sees a lower version query on the
> same
>      network. From that time onwards, a router should send the lower
> version
>      queries.
>
>      Now the question is, when this router should revert back to its
> configured higher
>      version? The text in section 7.3.1 or elsewhere does not talk about
> this.
>
>      Should a timer 'lower_version_querier' be started and updated as and
> when lower
>      version queries are removed? Please note this is not same as
> other-querier-present
>      timer.
>
>      Can someone, who has implemented IGMPv3, let me know how this
> particular case
>      has been handled in their implementation?
>
> Regards,
> Bharat
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