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

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.
>> >
>> >
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>> --
>> Regards,
>>
>> Joe Astorino - CCIE #24347 R&S
>> Technical Instructor - IPexpert, Inc.
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Received on Sat Aug 15 2009 - 15:20:50 ART