From: Bob Sinclair (bsin@cox.net)
Date: Thu Nov 04 2004 - 00:14:44 GMT-3
Cert,
With autorp listener, you will see 224.0.1.39 and 224.0.1.40 as dense mode
groups. Autorp listener permits these two groups to use dense mode, even
when the interfaces are configured with sparse mode only. BTW, On many
IOS, you can enter the command - ip pim autorp listener - in global config,
but it often does not show up in the syntax as a valid option with the
question mark.
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: "Cisco Net" <network.cisco@gmail.com>
To: "Group Study" <ccielab@groupstudy.com>
Sent: Wednesday, November 03, 2004 10:05 PM
Subject: Auto RP with sparse mode and listner will fall in to dense mode ???
> Hi
> May be a stupid question. But i thought i better verify this.
> Also I did not had the ip pim auto-rp listner command on my routers to
> try this out.
>
> Assuming that i have configured the following
> 1-multicast on all the routers
> 2-ip pim sparse mode on all the interface
> 3- enabled ip pim auto-rp listner on all the routers
> 4- One router say R3 is configured as RP (auto RP) for a specific
> group 230.1.1.1
> 5- MA is already configured
>
> Everything should work as expected...
> Now if i have configured igmp-join for another group 225.5.5.5 on one
> of the router.
> Does the ping to this group will work ?
>
> All routers will fall in to dense mode for this group even though
> routers are configured for sparse only...
>
> Will i see 224.0.1.40 and 224.0.1.39 in my mroute table ?
> Thank you
> Regards
> Cert
>
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