From: Bob Chahal (bob.chahal@xxxxxxxxxxxx)
Date: Tue Aug 21 2001 - 10:29:59 GMT-3
I tried Doyle's Vol2 and read all the Cisco stuff (Tech tips and CCO) and
it's only after reading the Beau Williamson "developing IP multicast
network" book that things have started sinking in. I recommend it if you
really want to begin to understand Multicast networks. No shortcuts I'm
afraid, not for me anyway.
----- Original Message -----
From: "CCIE yong" <ccie_yong@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, August 21, 2001 4:42 AM
Subject: RE: RPF lookup failed stuff with auto rp
> Hi,
>
> I'm still struggling with the multicasting topics, doesn't seems to have
> much practise in bootcamp ot fatkid lab (normally dense mode), is there
any
> good documents that I can find in order to have good understanding on pim
> spase mode (static rp or auto-rp) besides the Multicast Tech Tips on Cisco
> sites which I've read thru, it provides me quite a good start but more on
a
> quick start instead of understanding it. Whereras the "developing IP
> multicast network" of CiscoPress seems to be complicated to me as they are
> quite lengthy. Is it important that for me to still go for this book ? or
I
> can supplement it from other sources ?
>
> Appreciate your input.
> Thanks in advance.
> Yonger
>
>
> >From: "Daniel C. Young" <danyoung99@mediaone.net>
> >Reply-To: "Daniel C. Young" <danyoung99@mediaone.net>
> >To: "'rsevier'" <rsevier@zealousolutions.com>, "'Atakan San'"
> ><asan@cisco.com>
> >CC: "'Daniel Young'" <danyoung99@mediaone.net>, <ccielab@groupstudy.com>
> >Subject: RE: RPF lookup failed stuff with auto rp
> >Date: Mon, 20 Aug 2001 12:14:22 -0700
> >
> >Very true. Also, to add to Raymond's explanation: mapping agents hold an
> >election and advertise the winner (the RP for the group) to the
224.0.1.40
> >address.
> >
> >Daniel
> >
> >-----Original Message-----
> >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> >rsevier
> >Sent: Monday, August 20, 2001 10:40 AM
> >To: Atakan San
> >Cc: Daniel Young; ccielab@groupstudy.com
> >Subject: RE: RPF lookup failed stuff with auto rp
> >
> >
> >A- It sounds like you had the mapping agent and the candidate rp
pointing
> >to your loopback, is that safe to assume? Let's understand the process
now.
> >C-RP's will begin multicasting their candidacy to be the RP via
RP-announce
> >messages which are sent via the 224.0.1.39 group. The mapping agents
will
> >multicast the contents of their group-to-RP mapping cache to the
224.0.1.40
> >group. All other routers will join the 224.0.1.40 group. So I am going
to
> >guess that if the interface that you have as the C-RP and the MA needs to
> >be
> >in the PIM process in order to participate in the 224.0.1.39 & 224.0.1.40
> >groups. I will try to validate with some reference documentation at a
later
> >time. Hope this helps.
> >
> >Raymond
> >
> >-----Original Message-----
> >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> >Atakan San
> >Sent: Monday, August 20, 2001 9:28 AM
> >To: rsevier
> >Cc: ccielab@groupstudy.com
> >Subject: Re: RPF lookup failed stuff with auto rp
> >
> >
> >Thanks for all answers and further commends on this guys
> >I put ip pim sparse-dense-mode under loopback and it worked
> >Raymond I checked your stuff My loopback is/was always reachable via
> >unicast
> >At this point, I have no possibility to have a kind of pim neighbor with
> >loopback0 but needed to put pim command why ?
> >Cheers
> >Atakan
> >
> >rsevier wrote:
> >
> > > Atakan - Check your unicast table. The RPF lookups are dependent on
> >the
> > > unicast table and mroutes.
> > >
> > > Raymond
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > > Atakan SAN
> > > Sent: Monday, August 20, 2001 7:46 PM
> > > To: ccielab@groupstudy.com
> > > Subject: RPF lookup failed stuff with auto rp
> > >
> > > Hi Group
> > >
> > > Very straightforward but hitting a strange issue
> > > sparse-dense mode all
> > >
> > > X3---------------- X2
> > > '
> > > '
> > > '
> > > '
> > > X1
> > >
> > > Testing auto-rp---> X3' s loopback0 192.19.27.7 is used for both
> > > announce and discovery messages for auto-rp
> > >
> > > I am having RPF lookup faileds as follows on X1
> > > 15:55:47: IP: s=192.19.27.7 (Serial0.12) d=224.0.1.39 len 52, RPF
lookup
> > > faileds
> > > 15:55:47: IP: s=192.19.27.7 (Serial0.13) d=224.0.1.39 len 52, RPF
lookup
> > > faileds
> > > 15:55:47: IP: s=192.19.27.7 (Serial0.12) d=224.0.1.40 len 52, RPF
lookup
> > > faileds
> > > 15:55:47: IP: s=192.19.27.7 (Serial0.13) d=224.0.1.40 len 52, RPF
lookup
> > > faileds
> > > X1#
> > > 15:56:47: IP: s=192.19.27.7 (Serial0.12) d=224.0.1.39 len 52, RPF
lookup
> > > faileds
> > > 15:56:47: IP: s=192.19.27.7 (Serial0.13) d=224.0.1.39 len 52, RPF
lookup
> > > faileds
> > > 15:56:47: IP: s=192.19.27.7 (Serial0.12) d=224.0.1.40 len 52, RPF
lookup
> > > faileds
> > > 15:56:47: IP: s=192.19.27.7 (Serial0.13) d=224
> > >
> > > Thanks
> > > Atakan
> > > **Please read:http://www.groupstudy.com/list/posting.html
> > > **Please read:http://www.groupstudy.com/list/posting.html
> >**Please read:http://www.groupstudy.com/list/posting.html
> >**Please read:http://www.groupstudy.com/list/posting.html
> >**Please read:http://www.groupstudy.com/list/posting.html
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