Re: Multicast IGMP - "General Query" and "Query Membership"

Hello,

Membership Query is what they were called in igmpv1. When igmpv2 came out,
they were broken up into General Queries and Group-Specific Queries, with
the General Query taking the role of the old Membership Query. I never
noticed that the timer did not change before. It looks like Cisco will use
the v1 interval for all versions, by default.You can change it of course:

R1(config-if)#ip igmp query-interval 125

-hth

On Sat, Aug 15, 2009 at 2:20 AM, But Nicky <lyredhair_at_gmail.com> wrote:

> Hi,
> Thanks Dennis and all.
>
> Firstly, I did not mean "Membership Query" is the "Source Specific Query".
> I
> clear the problem when I read the link to RFC.
> But when I read the Wendell Odem Official Book - 3th Edition, I saw
> sometime
> the author say Query interval is 60 second and sometime he say 125 second.
> And the summary in page 563 as below.
>
> Feature IGMPv1 IGMPv2 IGMPv3
> Default Query Interval 60 seconds 125 seconds 125 seconds
>
> But when I configure the router, the Interval of all version 1, 2 and 3 is
> only 60 second.
> !
> R0(config)#int fa 0/0
> R0(config-if)#ip igmp version 1
> R0(config-if)#do sh ip igmp int fa 0/0 | in host version|query interval
> Current IGMP host version is 1
> IGMP query interval is 60 seconds
> !
> R0(config-if)#ip igmp version 2
> R0(config-if)#do sh ip igmp int fa 0/0 | in host version|query interval
> Current IGMP host version is 2
> IGMP query interval is 60 seconds
> !
> R0(config-if)#ip igmp version 3
> R0(config-if)#do sh ip igmp int fa 0/0 | in host version|query interval
> Current IGMP host version is 3
> IGMP query interval is 60 seconds
> !
> Please, help me clear the problem?
>
> Many thanks
> But Nguyen.
>
>
> On Sat, Aug 15, 2009 at 11:52 AM, Dennis Worth <dennis.worth_at_gmail.com
> >wrote:
>
> > Check out RFC 2236. http://www.ietf.org/rfc/rfc2236.txt
> >
> > <http://www.ietf.org/rfc/rfc2236.txt>good stuff
> >
> > On Fri, Aug 14, 2009 at 9:45 PM, Joe Astorino <jastorino_at_ipexpert.com
> >wrote:
> >
> >> A general query is just a query that essentially says "what hosts are
> >> joined
> >> to which groups???" whereas a group specific query is specific for a
> >> certain multicast group as in "who is joined to 239.1.1.1"
> >>
> >> HTH
> >>
> >> On Sat, Aug 15, 2009 at 12:34 AM, But Nicky <lyredhair_at_gmail.com>
> wrote:
> >>
> >> > Dear all,
> >> > I am confusing about that. How is different between them?
> >> > I appreciate with your help, you guys.
> >> >
> >> > Regards,
> >> > But Nguyen.
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
> _______________________________________________________________________
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> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >>
> >>
> >> --
> >> Regards,
> >>
> >> Joe Astorino - CCIE #24347 R&S
> >> Technical Instructor - IPexpert, Inc.
> >> Cell: +1.586.212.6107
> >> Fax: +1.810.454.0130
> >> Mailto: jastorino_at_ipexpert.com
> >>
> >>
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> >>
> >> _______________________________________________________________________
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> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> > --
> > Dennis Worth
>
>
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-- 
Bryan Bartik
CCIE #23707 (R&S), CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
Blogs and organic groups at http://www.ccie.net