Re: Querier transition based on Group Specific Query?
Indranil Bhattacharya <[email protected]> Tue, 31 Jan 2012 19:24:09 +0530
| Newsgroups | gmane.ietf.magma |
|---|---|
| Message-ID | <CAAaur94PU-fSwQ3QeMe+k9NieQu=iMonL8gxnVE02iwgkQO38A@mail.gmail.com> |
--===============2587566675399955503==
Content-Type: multipart/alternative; boundary=bcaec54eeb2018273704b7d34c83
--bcaec54eeb2018273704b7d34c83
Content-Type: text/plain; charset=ISO-8859-1
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 <[email protected]>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 [[email protected]]
> Sent: Tuesday, January 31, 2012 6:58 PM
> To: Bharat Joshi
> Cc: [email protected]
> 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 <[email protected]
> <mailto:[email protected]>> 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: [email protected]<mailto:[email protected]> [
> [email protected]<mailto:[email protected]>] On Behalf Of
> Indranil Bhattacharya [[email protected]<mailto:
> [email protected]>]
> Sent: Tuesday, January 31, 2012 8:56 AM
> To: [email protected]<mailto:[email protected]>
> 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***
>
>
--bcaec54eeb2018273704b7d34c83
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
<div>Hi Bharat,</div>
<div>=A0</div>
<div>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 RFC 2236, from Section 2.1</di=
v>
<div>=A0</div>
<div>0x11 =3D Membership Query<br>=A0=A0=A0=A0=A0=A0=A0 There are two sub-t=
ypes of Membership Query messages:<br>=A0=A0=A0=A0=A0=A0=A0 - General Query=
, used to learn which groups have members on an<br>=A0=A0=A0=A0=A0=A0=A0=A0=
=A0 attached network.<br>=A0=A0=A0=A0=A0=A0=A0 - Group-Specific Query, used=
to learn if a particular group<br>
=A0=A0=A0=A0=A0=A0=A0=A0=A0 has any members on an attached network.<br><br>=
=A0=A0=A0=A0=A0=A0=A0=A0 So Membership Query means both.</div>
<div>=A0</div>
<div>Thanks,</div>
<div>Indranil<br><br></div>
<div class=3D"gmail_quote">On Tue, Jan 31, 2012 at 7:00 PM, Bharat Joshi <s=
pan dir=3D"ltr"><<a href=3D"mailto:[email protected]">bharat_josh=
[email protected]</a>></span> wrote:<br>
<blockquote style=3D"BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PA=
DDING-LEFT:1ex" class=3D"gmail_quote">Hi Indranil,<br><br>=A0 =A0 =A0Is thi=
s defined in an RFC like that? Can you point me to the reference where it s=
ays what you mean below?<br>
<br>=A0 =A0 =A0I just did a google search on this and few top results for t=
his seems to refer to general query only.<br><br>Regards,<br>Bharat<br>____=
____________________________________<br>From: Indranil Bhattacharya [<a hre=
f=3D"mailto:[email protected]">[email protected]</a>]<br>
Sent: Tuesday, January 31, 2012 6:58 PM<br>To: Bharat Joshi<br>Cc: <a href=
=3D"mailto:[email protected]">[email protected]</a><br>Subject: Re: [magma] Queri=
er transition based on Group Specific Query?<br>
<div class=3D"im"><br>Hi Bharat,<br><br>=A0 =A0 =A0 =A0 =A0 =A0 =A0"IG=
MP Membership Query"query does not mean only General Query. It means b=
oth GQ and GSQ. Anything on this?<br><br>Thanks,<br>Indranil<br><br></div>
<div class=3D"im">On Tue, Jan 31, 2012 at 4:33 PM, Bharat Joshi <<a href=
=3D"mailto:[email protected]">[email protected]</a><mailto=
:<a href=3D"mailto:[email protected]">[email protected]</a>&g=
t;> wrote:<br>
Hi Indranil,<br><br>=A0 =A0 =A0 =A0I think a router should always be lookin=
g at general queries.<br><br>=A0 =A0 =A0 =A0This is what is available in RF=
C 2236:<br><br>>>><br><br>=A0The following three events can cause =
the router to change states:<br>
<br>=A0- "query timer expired" occurs when the timer set for quer=
y<br>=A0 =A0transmission expires.<br><br>=A0- "query received from a r=
outer with a lower IP address" occurs when<br>=A0 =A0an IGMP Membershi=
p Query is received from a router on the same<br>
=A0 =A0network with a lower IP address.<br><br>=A0- "other querier pre=
sent timer expired" occurs when the timer set to<br>=A0 =A0note the pr=
esence of another querier with a lower IP address on the<br>=A0 =A0network =
expires.<br>
<br><<<<br><br>=A0 =A0The second point clearly says that it should=
be an "IGMP Membership Query" which can trigger a change in quer=
ier state.<br><br>Regards,<br>Bharat<br>___________________________________=
_____<br>
</div>From: <a href=3D"mailto:[email protected]">[email protected]=
g</a><mailto:<a href=3D"mailto:[email protected]">magma-bounces@iet=
f.org</a>> [<a href=3D"mailto:[email protected]">magma-bounces@ietf=
.org</a><mailto:<a href=3D"mailto:[email protected]">magma-bounces@=
ietf.org</a>>] On Behalf Of Indranil Bhattacharya [<a href=3D"mailto:mys=
[email protected]">[email protected]</a><mailto:<a href=3D"ma=
ilto:[email protected]">[email protected]</a>>]<br>
<div class=3D"im">Sent: Tuesday, January 31, 2012 8:56 AM<br></div>To: <a h=
ref=3D"mailto:[email protected]">[email protected]</a><mailto:<a href=3D"mailt=
o:[email protected]">[email protected]</a>><br>
<div class=3D"HOEnZb">
<div class=3D"h5">Subject: [magma] Querier transition based on Group Specif=
ic Query?<br><br>Hi,<br><br>=A0In the querier transition state machine, RFC=
2236 only mentions 'Query' and does not specify GQ or GSQ. Can a q=
uerier transition take place based on GSQ? Or is it okay to for a querier t=
o ignore GSQ? Can anyone please help me with this?<br>
<br>Thanks,<br>Indranil<br><br><br>**************** CAUTION - Disclaimer **=
***************<br>This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMA=
TION intended solely<br>for the use of the addressee(s). If you are not the=
intended recipient, please<br>
notify the sender by e-mail and delete the original message. Further, you a=
re not<br>to copy, disclose, or distribute this e-mail or its contents to a=
ny other person and<br>any such actions are unlawful. This e-mail may conta=
in viruses. Infosys has taken<br>
every reasonable precaution to minimize this risk, but is not liable for an=
y damage<br>you may sustain as a result of any virus in this e-mail. You sh=
ould carry out your<br>own virus checks before opening the e-mail or attach=
ment. Infosys reserves the<br>
right to monitor and review the content of all messages sent to or from thi=
s e-mail<br>address. Messages sent to or from this e-mail address may be st=
ored on the<br>Infosys e-mail system.<br>***INFOSYS******** End of Disclaim=
er ********INFOSYS***<br>
<br></div></div></blockquote></div><br>
--bcaec54eeb2018273704b7d34c83--
--===============2587566675399955503==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
magma mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/magma
--===============2587566675399955503==--