From: Hobbs (deadheadblues@gmail.com)
Date: Thu Feb 12 2009 - 14:58:26 ARST
Hi Gaurav,
I just quickly labbed these scenarios and this is my understanding,
please chime in if I am mistaken:
Solution 1: You are preventing joins for the AUTO-RP groups, so in
effect it does what you are tasked with. Since the upstream device
prevents the downstream device from joining those groups, it will not
forward AUTO-RP messages out of that interface.
Solution 2: You are actually preventing the AUTO-RP messages from
being sent to the downstream router. You are also preventing any
mroute state for any group.
Solution 3: I think this accomplishes the same as #1 because you are
preventing the AUTO-RP groups from being joined by the downstream
router.
It looks like the filter-autorp keyword works on groups that were
denied by the ACL. So if you are going to deny everything anyway, then
filter-autorp is redundant. ANd if you are going to prevent the
AUTO-RP groups from being joined, the filtering AUTO-RP messages for
the other groups is again redundant.
That being said, they all seem to solve your task. If I had a choice,
I don't know what I would pick... :)
-hth
On Thu, Feb 12, 2009 at 8:06 AM, GAURAV MADAN <gauravmadan1177@gmail.com> wrote:
> HI All
>
> I have a task that says multicast AUTO-RP announce and discovery messages
> should not be sent out f0/0
>
> Sol 1
> ************
> access-li 11 deny 224.0.1.39
> access-li 11 deny 224.0.1.40
> access-li 11 per any
>
> int f0/0
> ip multicast boundary 11
>
> Sol 2
> ********
> access-li 12 deny 224.0.0.0 0 15.255.255.255
> acess-li 12 per any
>
> int f0/0
> ip multicast boundary 12 filter-autorp
>
> As far as i understand ; In sol2 i dont want any multicast traffic coming in
> this interface and also i am denying auto-rp announce and discovery messages
> out this interface.
> Am i right ?
>
> Sol 3
> *********
>
> access-li 11 deny 224.0.1.39 access-li 11 deny 224.0.1.40
> access-li 11 per any
>
> int f0/0
> ip multicast boundary 11 filter-autorp
>
> I am really confused with this "filter auto-rp " keyword now
>
>
> Can someone explain the meaning of 3 sols given above
>
> Thnx in advance
> gaurav madan.
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sun Mar 01 2009 - 09:44:11 ARST