From: Ivan (ivan@iip.net)
Date: Wed Jan 17 2007 - 13:18:17 ART
this is already configured
see below
-----------
R1 - FR-multipoint, nbma, DR
- l1 - MA
-----------
On Wednesday 17 January 2007 18:20, Vincent Mashburn wrote:
> Since your RP is at a spoke, you are failing the rpf check. Configure
> "ip pim nbma mode" on your hub. This should fix your problem.
>
> Vince Mashburn
> Sr. Voice / Data Engineer
> 901-263-5072
> CCVP, CCNP
> Cisco IP Telephony Support Specialist
> Cisco IP Telephony Operations Specialist
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Ivan
> Sent: Tuesday, January 16, 2007 4:43 PM
> To: Cisco certification
> Subject: Multicast H&S
>
> Hello !
>
> Now i'm learn multicast and certanly problem appear. More then four hour
> spend
> with it but unsuccessfull. I will try describe briefly.
>
> H&S topology (FR). R2 - R1 - R3
>
> R1 - FR-multipoint, nbma, DR
> - l1 - MA
> R2 - l1 - RP static
> R3 - l0 - receiver
>
> All routers know about RP correctly.
> In my opinion R1(HUB) & R2(RP) must see R3 as receiver. And built shared
> tree
> until active source appear. But don't.
>
>
>
> More detail next.
> Receiver wish to receive traffic for group 224.1.2.3 and send
> IGMP-message.
> ----
> int l0
> ip igmp-join 224.1.2.3
> ----
>
> R3 has no exist (*,224.1.2.3) and create such entry.
> -----
> (*, 224.1.2.3), 00:14:08/00:02:10, RP 172.16.10.10, flags: SJCL
> Incoming interface: Serial1/3, RPF nbr 172.16.16.2
> Outgoing interface list:
> Loopback0, Forward/Sparse-Dense, 00:14:08/00:02:10
> -----
>
> Once OIL change in this entry from NULL to NOT-NULL. R3 must send join
> to RP.
> But r3 don't send this messahe in my case. Can you help me grasp ?
>
> ------
> R3#clear ip mrou 224.1.2.3
> R3#
> *Jan 17 00:59:59.306: PIM(0): Check RP 172.16.10.10 into the (*,
> 224.1.2.3)
> entry
> *Jan 17 00:59:59.306: PIM(0): Building Triggered (*,G) Join /
> (S,G,RP-bit)
> Prune message for 224.1.2.3
> ------
>
> Nothing at all about 224.1.2.3 on R2 and R1.
> ------
> R1#sh ip mroute 224.1.2.3
> Group 224.1.2.3 not found
>
> R2#sh ip mroute 224.1.2.3
> (*, 224.1.2.3), 00:50:32/00:02:28, RP 172.16.10.10, flags: SJCL
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Loopback0, Forward/Sparse-Dense, 00:50:32/00:02:28
> ------
-- Ivan
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