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

Hi Mohamed

Regarding your point:

-------------
Without any pings from R2 to this group there is maping ...Auto RP sent
> the update via maping agent R0 to R2
-------------

Pinging a multicast group has no relevance to RP announce or discovery
messages.
R2 is automatically listening to group 224.0.1.40 when PIM was enabled on an
interface.
As R0 sends RP discovery messages to 224.0.1.40, R2 learns of the group to
rp mappings.

2009/8/27 Mohamed El Henawy <m.henawy_at_link.net>

> Hello Roy ,
>
> yes i configured both to use the loopback 10.10.10.10
>
>
> here is the config
>
> > R1-----LAN-----R0-----FR------R2
> > R1
> > FastEthernet0/0 1.1.1.1 YES manual up up
> > !
> > interface FastEthernet0/0
> > ip address 1.1.1.1 255.255.255.0
> > ip pim sparse-mode
> > ip igmp join-group 224.11.11.11
> > duplex auto
> > speed auto
> >
> > R0
> > !
> > interface FastEthernet0/0
> > ip address 1.1.1.2 255.255.255.0
> > ip pim sparse-mode
> >
> > end
> >
> > R0#sh run int s1/0
> > ip address 2.2.2.1 255.255.255.0
> > ip pim sparse-mode
> > encapsulation frame-relay
> > serial restart-delay 0
> > frame-relay map ip 2.2.2.2 101 broadcast
> > end
> >
> > R0#
> >
> > interface Loopback0
> > ip address 10.10.10.10 255.255.255.0
> > ip pim sparse-mode
> > end
> >
> > ip pim send-rp-announce Loopback0 scope 10 group-list 10
> > ip pim send-rp-discovery Loopback0 scope 10
> >
> > R0#sh access-lists 10
> > Standard IP access list 10
> > 10 permit 224.11.11.11
> > R0#
> >
> > R2#
> > !
> > interface Serial1/0
> > ip address 2.2.2.2 255.255.255.0
> > ip pim sparse-mode
> > encapsulation frame-relay
> > serial restart-delay 0
> > frame-relay map ip 2.2.2.1 202 broadcast
> >
> > ip route 10.10.10.10 255.255.255.255 2.2.2.1
> >
> >
> > before this route was aded i get
> >
> > *Mar 1 00:16:39.427: IP(0): s=10.10.10.10 (Serial1/0) d=224.0.1.40
> > id=166, ttl=9, prot=17, len=52(48), RPF lookup failed for source
> >
> >
> >
> > then i correct it and after that i noticed this debug on R2
> >
> > RP 10.10.10.10
> > *Mar 1 00:19:35.375: MRT(0): Update (*,224.0.1.40), RPF /0.0.0.0
> > *Mar 1 00:19:35.375: MRT(0): Update Serial1/0/224.0.1.40 in the olist
> of
> > (*, 224.0.1.40), Forward state - MAC built
> > *Mar 1 00:19:37.051: MRT(0): Update (*,224.0.1.39), RPF /0.0.0.0
> > *Mar 1 00:19:37.051: MRT(0): Update Serial1/0/224.0.1.39 in the olist
> of
> > (*, 224.0.1.39), Forward state - MAC not built
> > *Mar 1 00:19:38.527: IP(0): s=10.10.10.10 (Serial1/0) d=224.0.1.40
> > id=229, ttl=9, prot=17, len=52(48), mroute olist null
> > *Mar 1 00:19:38.531: Auto-RP(0): Received RP-discovery, from
> 10.10.10.10,
> > RP_cnt 1, ht 181
> > *Mar 1 00:19:38.531: Auto-RP(0): Update (224.11.11.11/32,
> > RP:10.10.10.10), PIMv2 v1(?), v2v1 ===========================>
> > Info source: 10.10.10.10 (?), elected via Auto-RP
> > Uptime: 00:00:54, expires: 00:02:02
> > R2#
> >
> > R2#sh ip pim rp map
> > PIM Group-to-RP Mappings
> >
> > Group(s) 224.11.11.11/32
> > RP 10.10.10.10
> >
> > Without any pings from R2 to this group there is maping ...Auto RP sent
> > the update via maping agent R0 to R2
> >
> >
> >
>
> ----- Original Message -----
> *From:* Roy Waterman <roy.waterman_at_gmail.com>
> *To:* Mohamed El Henawy <m.henawy_at_link.net>
> *Cc:* Mark Matters <markccie_at_gmail.com> ; Keegan.Holley_at_sungard.com ; G2<farawayguy_at_gmail.com>; Cisco
> certification <ccielab_at_groupstudy.com> ; nobody_at_groupstudy.com
> *Sent:* Thursday, August 27, 2009 12:50 AM
> *Subject:* Re: Auto RP with sparse-mode and no dm-fallback..and its
> working
>
> Hi Mohammed
>
> Looks like RP = mapping agent = 10.
>
> *Mar 1 00:36:16.159: Auto-RP(0): Received RP-discovery, from *10.10.10.10
> *, <-- received from mapping agent
> RP_cnt 1, ht 181
>
> Have you configured both ip pim send rp announce & send rp discovery on
> 10.10.10.10?
> You should expect to see the mappings on your routers as they start
> automatically listening to 224.0.1.40 as soon as u configured pim...
>
> As Keegan mentioned, please post the configs...
>
> Regards
> Roy
>
> 2009/8/26 Mohamed El Henawy <m.henawy_at_link.net>
>
>> What i dont understand is how come we are enabling only sparse and yet we
>> can
>> see the maping on all the routers...why use BSR then
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
> ------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.409 / Virus Database: 270.13.69/2328 - Release Date: 08/26/09
> 12:16:00
>
>

-- 
Regards
Roy
Blogs and organic groups at http://www.ccie.net