From: Ivan Kuchin (ivan@iip.net)
Date: Thu Jan 18 2007 - 06:27:26 ART
Exactly. Thank you Victor. I also find this feature yesterday.
I can't realize why this "feature" occur.
Destination of join message is multicast-group. Therefore this packet must
send to HUB anyway. Where RPF IP is take part ?
On Wednesday 17 January 2007 19:53, Victor Cappuccio wrote:
> Well try this one
> Configure a mroute in R3 pointing to RP Loopback interface with the next
> hop via R1. I think I had a similar issue and with that it was solved,
> also please check not to be switching to the SPT
>
> HTH
> Victor.-
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Ivan
> Sent: Wednesday, January 17, 2007 12:18 PM
> To: Vincent Mashburn
> Cc: Cisco certification
> Subject: Re: Multicast H&S
>
> 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
> > ------
-- iWAN kU^IN (mail to: ivan@iip.net) NOC iip.net 137-31-04
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