Re: [magma] Querier transition based on Group Specific Query?

[Indranil Bhattacharya <[e-mail]>]

Hi Bharat,

              RFC 2236, from Section 2.1

0x11 = Membership Query
        There are two sub-types of Membership Query messages:
        - General Query, used to learn which groups have members on an
          attached network.
        - Group-Specific Query, used to learn if a particular group
          has any members on an attached network.

         So Membership Query means both.

Thanks,
Indranil

On Tue, Jan 31, 2012 at 7:00 PM, Bharat Joshi <[e-mail]>wrote:

> Hi Indranil,
>
>      Is this defined in an RFC like that? Can you point me to the
> reference where it says what you mean below?
>
>      I just did a google search on this and few top results for this seems
> to refer to general query only.
>
> Regards,
> Bharat
> ________________________________________
> From: Indranil Bhattacharya [[e-mail]]
> Sent: Tuesday, January 31, 2012 6:58 PM
> To: Bharat Joshi
> Cc: [e-mail]
> Subject: Re: [magma] Querier transition based on Group Specific Query?
>
> Hi Bharat,
>
>              "IGMP Membership Query"query does not mean only General
> Query. It means both GQ and GSQ. Anything on this?
>
> Thanks,
> Indranil
>
> On Tue, Jan 31, 2012 at 4:33 PM, Bharat Joshi <[e-mail]
> <mailto:[e-mail]>> wrote:
> Hi Indranil,
>
>        I think a router should always be looking at general queries.
>
>        This is what is available in RFC 2236:
>
> >>>
>
>  The following three events can cause the router to change states:
>
>  - "query timer expired" occurs when the timer set for query
>    transmission expires.
>
>  - "query received from a router with a lower IP address" occurs when
>    an IGMP Membership Query is received from a router on the same
>    network with a lower IP address.
>
>  - "other querier present timer expired" occurs when the timer set to
>    note the presence of another querier with a lower IP address on the
>    network expires.
>
> <<<
>
>    The second point clearly says that it should be an "IGMP Membership
> Query" which can trigger a change in querier state.
>
> Regards,
> Bharat
> ________________________________________
> From: [e-mail]<mailto:[e-mail]> [
> [e-mail]<mailto:[e-mail]>] On Behalf Of
> Indranil Bhattacharya [[e-mail]<mailto:
> [e-mail]>]
> Sent: Tuesday, January 31, 2012 8:56 AM
> To: [e-mail]<mailto:[e-mail]>
>  Subject: [magma] Querier transition based on Group Specific Query?
>
> Hi,
>
>  In the querier transition state machine, RFC 2236 only mentions 'Query'
> and does not specify GQ or GSQ. Can a querier transition take place based
> on GSQ? Or is it okay to for a querier to ignore GSQ? Can anyone please
> help me with this?
>
> Thanks,
> Indranil
>
>
> **************** CAUTION - Disclaimer *****************
> This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended
> solely
> for the use of the addressee(s). If you are not the intended recipient,
> please
> notify the sender by e-mail and delete the original message. Further, you
> are not
> to copy, disclose, or distribute this e-mail or its contents to any other
> person and
> any such actions are unlawful. This e-mail may contain viruses. Infosys
> has taken
> every reasonable precaution to minimize this risk, but is not liable for
> any damage
> you may sustain as a result of any virus in this e-mail. You should carry
> out your
> own virus checks before opening the e-mail or attachment. Infosys reserves
> the
> right to monitor and review the content of all messages sent to or from
> this e-mail
> address. Messages sent to or from this e-mail address may be stored on the
> Infosys e-mail system.
> ***INFOSYS******** End of Disclaimer ********INFOSYS***
>
>