RE: Auto RP with sparse-mode and no dm-fallback..and its

HA! I actually read that this weekend while studying. I would direct that to Scott Morris (or one of the other GS Guru's) as in my opinion, that could either be considered an error in the documentation or over configuration (as a safety net). Dense-mode fallback is only a feature of sparse-dense mode.

Could you post your configs for R3 & R2?

Regards,

Nathan

________________________________________
From: Mohamed El Henawy [m.henawy_at_link.net]
Sent: Tuesday, August 25, 2009 4:20 PM
To: Nathan Richie; Cisco certification
Subject: Re: Auto RP with sparse-mode and no dm-fallback..and its working

Hello Nathan ,

we put the no dm fallback when we use sparse mode ...as per Cisco ..

Benefits of Auto-RP in a PIM Network , step 14
http://www.cisco.com/en/US/docs/ios/ipmulti/configuration/guide/imc_basic_cfg_ps6350_TSD_Products_Configuration_Guide_Chapter.html

my problem that I have done everything to prevent R3 to know the mapping but
yet I find that R3 knows the mapping

----- Original Message -----
From: "Nathan Richie" <nathanr_at_boice.net>
To: "Mohamed El Henawy" <m.henawy_at_link.net>; "Cisco certification"
<ccielab_at_groupstudy.com>
Sent: Wednesday, August 26, 2009 12:12 AM
Subject: RE: Auto RP with sparse-mode and no dm-fallback..and its working

Using "no ip pim dm-fallback" would not have any bearing since you are using
sparse mode (you would need sparse-dense mode for this command to have an
effect).

Have you configured the "ip pim autorp-listener" command? Also which router
is your mapping agent?

________________________________________
From: nobody_at_groupstudy.com [nobody_at_groupstudy.com] On Behalf Of Mohamed El
Henawy [m.henawy_at_link.net]
Sent: Tuesday, August 25, 2009 4:09 PM
To: Cisco certification
Subject: Auto RP with sparse-mode and no dm-fallback..and its working

Hello Group ,

this might be a silly question but...still I wish to learn how :) ..I'm
tired
of multicast really

I have this setup

f0/0--R1----LAN-----R2-----FR-----R3---LAN---R5

- I have put ip pim sparse mode on the interfaces
- configured auto rp on R2 with specific ACL
-put no ip pim dm-fallback on R2 & R3
-Join the group I permitted with the ACL on R1 F0/0

my question is ....how come ( without any pings from R3 ) I see the rp
mapping
on R3 & R5 ? if I'm blocking the 39 & 40 groups as I'm using ACL with the RP
(
correct ? ) and I'm putting no ip pim dm-fallback

where is the trick ?

Thanks....

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Received on Tue Aug 25 2009 - 17:29:04 ART