Re: pim auto-rp priority missing?

The mapping agent listens to all RP candidate announcements and builds a
table with the information. If several RPs announce themselves for a
multicast group range, the mapping agent chooses only onethe RP with the
highest IP address. It then advertises the RP to all PIM routers in the
network using an RP discovery message. Mapping agents send this information
every 60 seconds (the default setting).

in the DOC cd also !!!!

Salah

On Fri, Apr 3, 2009 at 8:13 PM, Ernest Wambari <ewambari_at_gmail.com> wrote:

> On DocCD:
>
>
>
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12
.2_44_se/configuration/guide/swmcast.html
>
> " the mapping agent selects the router or switch with the highest IP
> address as the active RP and stores this RP address in the Group-to-RP
> mapping cache."
>
> W.
>
>
> On Fri, Apr 3, 2009 at 8:08 PM, Salah ElShekeil <salah.elshekeil_at_gmail.com
> > wrote:
>
>> here you go
>>
>>
>>
http://www.cisco.com/en/US/tech/tk828/technologies_configuration_example09186
a00801cb923.shtml
>>
>>
>> *!--- R4 is elected because it has a higher IP address*
>>
>> HTH
>>
>> Salah
>>
>> 54 PM, Wouter Prins <wp_at_null0.nl> wrote:
>>
>> > Thanks for the replies everyone, do you have a link that states that the
>> > higher ip will win in this situation? I was not able to find that at
>> all. :)
>> >
>> > 2009/4/3 Salah ElShekeil <salah.elshekeil_at_gmail.com>
>> >
>> > Auto-RP
>> >>
>> >>
>> >>
>> >> Multiple RPs can be used to serve different group ranges or *serve as
>> >> backups to each other*. For Auto-RP to work, a router must be
>> designated
>> >> as an RP-mapping agent, which receives the RP-announcement messages
>> from the
>> >> RPs and arbitrates conflicts. The RP-mapping agent then sends the
>> consistent
>> >> group-to-RP mappings to all other routers. Thus, all routers
>> automatically
>> >> discover which RP to use for the groups they support.
>> >> Directly from the DOC cd
>> >>
>> >> the higher ip address will be the RP,
>> >>
>> >>
>> >>
>> >> On Fri, Apr 3, 2009 at 6:28 PM, Wouter Prins <wp_at_null0.nl> wrote:
>> >>
>> >>> hi list,
>> >>>
>> >>> I was wondering how to create a backup RP for a certain group when
>> using
>> >>> Auto-RP. I cannot configure any priorities as you can when configuring
>> it
>> >>> for use with a bsr?
>> >>> I checked the doccd but i am not able to find a similar function? How
>> >>> does
>> >>> the mapping-agent decide which RP to use when two RP's announce them
>> same
>> >>> groups in Auto-RP mode?
>> >>>
>> >>> Thanks,
>> >>> --
>> >>> Wouter Prins
>> >>> wp_at_null0.nl
>> >>> 0x301FA912
>> >>>
>> >>>
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>> >>>
>> >>>
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>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>
>> >
>> >
>> > --
>> > Wouter Prins
>> > wp_at_null0.nl
>> > 0x301FA912
>>
>>
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>>
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Received on Fri Apr 03 2009 - 20:15:16 ART