From: Shamin (ccie.xpert@gmail.com)
Date: Thu Jul 19 2007 - 02:54:13 ART
HI Antonio,
Thanks for the reply.
The reason i asked is because in the DOC CD , the explanation is as below.
An IGMP group state for (G) needs to be counted (either per interface or
globally) if (0.0.0.0, G) is permitted by the default or configured by the
access-list attribute. The IGMP group state for (G) is not counted if it is
denied by the access list.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/himc_c/
chap10/mcbcigmp.htm#wp1027188
Thanks
shamin
On 7/10/07, Antonio Soares <amsoares@netcabo.pt> wrote:
>
> The groups under the ACL will not count. Here's an example:
>
> +++++++++++++++++++++++++++++++++
> R6#sh runn int f0/0
> Building configuration...
>
> Current configuration : 165 bytes
> !
> interface FastEthernet0/0
> ip address 10.10.10.6 255.255.255.0
> ip pim sparse-dense-mode
> ip igmp limit 10 except DO_NOT_COUNT_THESE
> duplex auto
> speed auto
> end
>
> R6#
> +++++++++++++++++++++++++++++++++
> R6#sh ip access
> Standard IP access list DO_NOT_COUNT_THESE
> 20 permit 225.1.1.1 (56 matches)
> 10 permit 224.1.1.1 (74 matches)
> 30 permit 226.1.1.1 (56 matches)
> R6#
> +++++++++++++++++++++++++++++++++
> R6#sh ip igmp membership
> Flags: A - aggregate, T - tracked
> L - Local, S - static, V - virtual, R - Reported through v3
> I - v3lite, U - Urd, M - SSM (S,G) channel
> 1,2,3 - The version of IGMP the group is in
> Channel/Group-Flags:
> / - Filtering entry (Exclude mode (S,G), Include mode (*,G))
> Reporter:
> <mac-or-ip-address> - last reporter if group is not explicitly
> tracked
> <n>/<m> - <n> reporter in include mode, <m> reporter in
> exclude
>
> Channel/Group Reporter Uptime Exp. Flags
> Interface
> *,238.1.1.1 10.10.10.1 00:01:05 02:25 2A Fa0/0
> *,237.1.1.1 10.10.10.1 00:01:06 02:27 2A Fa0/0
> *,236.1.1.1 10.10.10.1 00:01:04 02:25 2A Fa0/0
> *,235.1.1.1 10.10.10.1 00:01:06 02:27 2A Fa0/0
> *,234.1.1.1 10.10.10.1 00:01:00 02:31 2A Fa0/0
> *,233.1.1.1 10.10.10.1 00:01:00 02:28 2A Fa0/0
> *,232.1.1.1 10.10.10.1 00:01:03 02:24 2A Fa0/0
> *,230.1.1.1 10.10.10.1 00:01:09 02:29 2A Fa0/0
> *,229.1.1.1 10.10.10.1 00:01:08 02:23 2A Fa0/0
> *,227.1.1.1 10.10.10.1 00:01:07 02:21 2A Fa0/0
> *,226.1.1.1 10.10.10.1 00:01:03 02:28 2A Fa0/0
> *,225.1.1.1 10.10.10.1 00:01:00 02:21 2A Fa0/0
> *,224.1.1.1 10.10.10.1 00:01:08 02:24 2A Fa0/0
> *,224.0.1.40 10.10.10.6 00:29:58 02:20 2LA Fa0/0
> R6#
> +++++++++++++++++++++++++++++++++
> R6#sh ip igmp int
> FastEthernet0/0 is up, line protocol is up
> Internet address is 10.10.10.6/24
> IGMP is enabled on interface
> Current IGMP host version is 2
> Current IGMP router version is 2
> IGMP query interval is 60 seconds
> IGMP querier timeout is 120 seconds
> IGMP max query response time is 10 seconds
> Last member query count is 2
> Last member query response interval is 1000 ms
> Inbound IGMP access group is not set
> IGMP activity: 69 joins, 55 leaves
> Interface IGMP State Limit : 10 active out of 10 max
> Multicast routing is enabled on interface
> Multicast TTL threshold is 0
> Multicast designated router (DR) is 10.10.10.6 (this system)
> IGMP querying router is 10.10.10.1
> Multicast groups joined by this system (number of users):
> 224.0.1.40(1)
> R6#
> +++++++++++++++++++++++++++++++++
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Shamin
> Sent: terga-feira, 10 de Julho de 2007 16:48
> To: Cisco certification
> Subject: ip igmp limit number [except access-list]
>
> Hi,
>
> I am trying to understand the logic of the access-list along with the *ip
> igmp limit* *number* command.
> i.e *ip igmp limit* *number* [*except **access-list*]
>
>
> I am not able to understand the except logic as to whether the groups
> permitted by the access-list are not counted towards the total or is it
> otherwise.
>
> If someone can clarify this to me please.
>
> Regards
> Shamin**
>
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