From: Majonestx (majonestx@gmail.com)
Date: Fri Aug 15 2008 - 22:31:41 ART
Yeah I know it works. I just don't understand in theory why it works.
If all interfaces are pim sparse
How is auto rp traffic (dense) working without sparse dense or the
auto rp listener command. In theory that 224.0.1.39/40 which only
travels as dense mode shouldn't be able to form auto rp mappings.....
Do a show ip pim rp mapping and you'll see the static entry then you
also see a dynamic entry. That's my confusion... I can get it to work
just don't know why it works.. Thanks for taking the time to lab it.
Again, do a show ip pim rp mappings and you'll see both entries.
Sent from my iPhone
On Aug 15, 2008, at 8:12 PM, Hobbs <deadheadblues@gmail.com> wrote:
> I got it to work. I need this on all routers:
>
> ip pim rp-address 1.1.1.1 1
> access-list 1 permit 224.0.1.39
> access-list 1 permit 224.0.1.40
>
> my hub loopback was 1.1.1.1.
>
> Without these commands on the spokes the RP lookup fails. Do a debug
> ip
> mpacket to see what's going on. If you can't see any output disable ip
> mroute-cache on your interfaces:
>
> int s1/0
> no ip mroute-cache
> int s1/1
> no ip mroute-cache
>
> Also, don't forget ip pim nbma-mode on the hub.
>
> hope that helps.
>
>
>
> On Fri, Aug 15, 2008 at 6:46 PM, Hobbs <deadheadblues@gmail.com>
> wrote:
>
>> im gonna lab it right now. see what i can find
>>
>>
>> On Fri, Aug 15, 2008 at 6:38 PM, Majonestx <majonestx@gmail.com>
>> wrote:
>>
>>> Yes! You got it. I'll tell you one thing internetworkexpert
>>> materials can
>>> fry your brain at times.
>>>
>>> :)
>>>
>>> Sent from my iPhone
>>>
>>> On Aug 15, 2008, at 7:35 PM, Hobbs <deadheadblues@gmail.com> wrote:
>>>
>>> Is your requirement not to use sparse-dense mode or autorp
>>> listener? Never
>>> tried that but it's interesting...
>>>
>>> On Fri, Aug 15, 2008 at 4:54 PM, Michael Jones < <majonestx@gmail.com
>>> >
>>> majonestx@gmail.com> wrote:
>>>
>>>> Experts I can not wrap my brain around this, please help!
>>>>
>>>> Scenario: I'm running all sparse mode interfaces, the workbook is
>>>> asking
>>>> for
>>>> R2(below) to be Auto RP/ C-RP and MA.
>>>>
>>>> The announce command takes care of the C-RP
>>>> The discovery command takes care of MA
>>>> The static RP command takes care of the auto rp- because its
>>>> tied to
>>>> the
>>>> access lits. The access lists says only permit 150.1.2.2 to be
>>>> the auto
>>>> rp
>>>> for the mentioned groups.
>>>>
>>>> What I do understand is that the candidate RP will talk on the
>>>> 224.0.1.39address while the Mapping agent listens exclusively for
>>>> any
>>>> Candidates
>>>> talking on that address. The Mapping agent then turns around and
>>>> speaks
>>>> on
>>>> the 224.0.1.40 for the "client routers"and tells them who the RP
>>>> is.
>>>> What I
>>>> don't understand is, why do you need the access lists ?? If
>>>> 150.1.2.2is
>>>> the only speaking candidate in the network, shouldn't this become
>>>> the RP
>>>> by
>>>> default for all multicast groups ? Also is this really auto RP ?
>>>> Because
>>>> without the Auto rp listener command or sparse dense mode on the
>>>> interface
>>>> how is that 224.0.1.39/40 even getting pushed out since they're no
>>>> sparse-dense/dense mode interfaces ???
>>>>
>>>>
>>>> ip pim rp-address 150.1.2.2 1
>>>> ip pim send-rp-announce 150.1.2.2 scope 16
>>>> ip pim send-rp-discovery Loopback0 scope 16
>>>> !
>>>> access-list 1 permit 224.0.1.39
>>>> access-list 1 permit 224.0.1.40
>>>>
>>>>
>>>> Thanks in advance for getting me straightened out!
>>>>
>>>>
>>>> Blogs and organic groups at <http://www.ccie.net>http://
>>>> www.ccie.net
>>>>
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>
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