From: Mark Stover (mstover@xxxxxxxxx)
Date: Fri Jan 26 2001 - 15:38:45 GMT-3
What are your IP addresses on the segment between R2 and R3? Which router is th
e DR for that segment? Funny things can happen to the multicast tree(s) if R3 i
s the DR for that segment.
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Kevin Baumgartner
> Sent: Friday, January 26, 2001 1:27 PM
> To: Daniel M. Dawson; ccielab@groupstudy.com
> Subject: Re: A question about PIM in Sparese Mode
>
>
> This is exactly the same problem I was working on last night.
> And I had exactly
> the same problem that you are having. And still searching for
> a answer.
> Like you
> I tried "IP PIM NBMA-Mode" on the hub and it didn't help. I
> am pretty sure if
> point-to-point links are done between the hub and spokes it will work.
>
> So at this point without using point-to-point subinterfaces
> I am not sure
> what
> the answer is.
>
> Kevin
>
> At 11:45 AM 1/26/01 -0600, Daniel M. Dawson wrote:
>
> >I have set up the following PIM sparse mode config.
> >
> > ptp serial Eth Frame Frame
> > Serial Serial
> > spoke hub
> spoke
> > <R1> ------------ <R2> -------- <R3> ------------ <R4>
> --------- <R5>
> > RP RP
> > Announce Discovery
> >(all groups) (all groups)
> >
> >All interfaces are ip pim sparse-mode
> >
> >In this configuration R3 receives the RP discovery packets
> from R2 and puts
> >an PIM RP mapping to the rp on R1. However R3 does not
> forward the RP
> >discovery announcements out its framerelay serial interface
> to R4 and so R4
> >and R5 do not ever get the Auto RP mapping. In this
> situation R4 and R5 are
> >essentially out of the PIM reachability and none of their
> joined IGMP group
> >interfaces can be ping'd from anywhere. If however I move
> the RP Discovery
> >statement to R3. It then forwards the discovery packets out it's
> >frame-relay serial interface to R4 who then forwards the
> discovery frames
> >out the sub-interface to r5 and all routers discover the RP
> to group mapping
> >and all joined igmp groups on all routers can be pinged from
> any other
> >router.
> >
> >I have looked at the IP PIM NBMA-Mode command which has not
> helped any. I
> >have debuged ip pim auto-rp and in the first situation R3 is
> not forwarding
> >the RP-discovery messages out to R4 that are coming from R2.
> >
> >Does anyone have any idea what is wrong with the situation.
> >
> >Thanks
> >
> >
> >Daniel M. Dawson
> >E-mail: dandawson@lucent.com
> >
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:27:44 GMT-3