Re: No SOLUTION till DATE for this SCNERIO ???? Challenging

Well my approach would be number 3. Experiences here vary widely but
I found that explaining - very fully - what my dilemma was to the
proctor was sometimes (but not necessarily always) helpful. And I
would be surprised to see a task in the lab that was unsolvable. The
SP track has been around awhile in its current state and I would think
all bugs would have been exorcised by now.

I'm always very, very skeptical that something is a bug. I did find
one mcast bug in Dynamips and it was independently verified to truly
be a bug but to my knowledge it was never resolved. But it had
nothing to do with draft-rosen or the presence /absence of a default
route, so it's unlikely that you're up against that. Have you tried
different IOS?

I still think there's lots you can do to try to resolve this. What if
it isn't a bug at all? As close as you are to your lab date, you
don't want to obsess over one single issue, but on the other hand you
don't want to potentially leave points on the table by ignoring it.
Have you at least determined whether or not it's your MDT that's
breaking or just your mcast state within the VRF? I didn't fully
understand the part where you said something about an outgoing
interface pointing towards the default route. I would love to see the
various 'sh ip mroute' before and after, etc.

Again, best wishes one way or the other...

(planning on attending a Super Bowl party so will be offline for the
rest of the day starting shortly but will check back again tomorrow)

____________________________________________
There are only 10 types of people in the world:
Those who understand binary and those who do not...

On Feb 5, 2011, at 11:37 , Asfer Shah wrote:

> Thanks SCOTT,
> Just one query, what do you guys suggest, because everyone is saying
> that this is a BUG in CISCO IOS
> so in that case what should a person do ?
>
> 1. Just paste the standard working configs verify the solution one
> by one , and come out of the lab.
> 2. Do a work around which may deduct the marks because both the
> technologies don't work together at the same time
> 3. ask the proctor ? because he must know the bug , but again he can
> make your day worst by guiding you into a wrong way ?
> 4. Just drop one Section, lets say the internet and dont risk the
> entire MULTICAST because of that 0.0.0.0 default route :(
>
>
> please reply back since I have less then a week now :(, I hope I
> don't encounter into this situation in the real LAB ?
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> ======================================================================
> > CC: markom_at_ipexpert.com; ccielab_at_groupstudy.com
> > From: scott_ccie_list_at_it-ag.com
> > To: s_asfar_at_hotmail.com
> > Subject: Re: No SOLUTION till DATE for this SCNERIO ????
> Challenging MULTICAST TASK ?? Please help
> > Date: Thu, 3 Feb 2011 17:19:57 -0700
> >
> > Oh, and also:
> >
> > Best luck with your rapidly approaching lab date!!
> >
> > ____________________________________________
> > There are only 10 types of people in the world:
> > Those who understand binary and those who do not...
> >
> > On Feb 3, 2011, at 5:07 , Scott M Vermillion wrote:
> >
> > > So I brushed up a little bit on my draft-rosen stuff this
> afternoon
> > > (been nearly three years since I even thought about that mess!)
> and
> > > then had a closer look at your configs. In truth, it will probably
> > > take an SP CCIE or SP CCIE candidate to weigh in and help you
> out but
> > > I will be happy to try. At the very least, I still feel very
> strong
> > > in general mcast, if not MDT, specifically.
> > >
> > > Are you perchance running this in a Dynamips environment? If so,
> I'd
> > > love to see that .net file. Also, you said you could share further
> > > details, which would be most helpful. Probably more so to an SP
> type
> > > than and R&S guy like myself but the more detail you post, the
> more
> > > likely you are to entice someone knowledgeable into the
> problem! ;-)
> > >
> > > ____________________________________________
> > > There are only 10 types of people in the world:
> > > Those who understand binary and those who do not...
> > >
> > > On Feb 2, 2011, at 7:31 , Asfer Shah wrote:
> > >
> > >> Thanks
> > >> Scoottt, I surely will try to check the tutorials but the
> problem is
> > >> that Its
> > >> very basic thing which is not coming up ?
> > >> I am trying to run the Multicast in INTRA-AS between my two
> sites(R9
> > >> and
> > >> R7/R8) connected via MPLS - VPN's . (R4 is RP and client & R5 is
> > >> SOURCE)
> > >> Everything runs smoothly unless, I introduce the default route
> from
> > >> the (R6)
> > >> which is the internet gateway for my PE's of ABC Vpn's.
> > >>
> > >> Whenever the default route is injected my PE outgoing interface
> > >> donot point
> > >> towards the tunnel and starts to follow the 0.0.0.0 source !!
> which
> > >> breaks my
> > >> multicast communication and messes everything !
> > >> I can share the details with you even further, I discussed this
> > >> scenerio will
> > >> couple of other CCIE's but somehow no one has managed to answer
> my
> > >> solution ?
> > >> thanks
> > >>
> > >> CC: markom_at_ipexpert.com; ccielab_at_groupstudy.com
> > >> From: scott_ccie_list_at_it-ag.com
> > >> To: s_asfar_at_hotmail.com
> > >> Subject: Re: No SOLUTION till DATE for this SCNERIO ????
> Challenging
> > >> MULTICAST
> > >> TASK ?? Please help
> > >> Date: Wed, 2 Feb 2011 11:17:11 -0700
> > >>
> > >> So it looks as if you've got some vendor's full-scale SP lab up
> and
> > >> running
> > >> there. Lots of layers to an onion like that which are not going
> to
> > >> be readily
> > >> apparent with just a glance over the configs. It's also not
> evident
> > >> from your
> > >> text exactly what was working before the introduction of the
> default
> > >> route
> > >> came along and broke things. I see you've got a couple of 'ip
> igmp
> > >> join-group' commands on your CEs but it's not clear to me what
> you
> > >> were
> > >> pinging - and from where - that worked and then later ceased
> > >> working. What
> > >> mcast troubleshooting have you done thus far?
> > >> I try to keep my posts as vendor-neutral as possible but if you
> > >> google
> > >> "multicast troubleshooting" you will find a couple of very,
> very good
> > >> tutorials out there. If you follow a logical process of
> validating
> > >> all of
> > >> your various control and data plane RPF checks, etc, you are
> bound
> > >> to find the
> > >> problem for yourself quickly...
> > >> ____________________________________________There are only 10
> types
> > >> of people
> > >> in the world:
> > >> Those who understand binary and those who do not...
> > >> On Feb 2, 2011, at 2:50 , Asfer Shah wrote:
> > >> thanks for the quick Reply, Actually I am appearing in les than a
> > >> week time
> > >> and I am failing to understand this buG !!
> > >> nothing much I could figure out !!!
> > >> I am hell stuck,since either multcast or Internet will wok at a
> > >> single time
> > >> !!
> > >>
> > >> CE1 is dual homed to PE5 and PE3, we have three GRE (MDT) tunnels
> > >> between PE2
> > >> , PE 5 and PE3
> > >> thanks
> > >>
> > >>
> > >> |--------------------------
> > >> PE5-----
> > >> -----
> > >> |
> > >> |
> > >>>> INT---------PE1--------PE2--------------------------
> PE3--------CE1
> > >>>> | |
> > >>>> | |
> > >>>> PE4 CE2
> > >>
> > >>
> > >>
> > >>> From: markom_at_ipexpert.com
> > >>> Date: Wed, 2 Feb 2011 10:16:40 +0100
> > >>> Subject: Re: No SOLUTION till DATE for this SCNERIO ????
> Challenging
> > >> MULTICAST TASK ?? Please help
> > >>> To: s_asfar_at_hotmail.com
> > >>> CC: bmcgahan_at_ine.com; scott_ccie_list_at_it-ag.com; ccielab_at_groupstudy.com
> > >>> ;
> > >> narbikk_at_gmail.com
> > >>>
> > >>> Can you please post all the relevant configurations to the
> list so
> > >>> we
> > >>> can actually troubleshoot it? :-)
> > >>>
> > >>> --
> > >>> Marko Milivojevic - CCIE #18427
> > >>> Senior Technical Instructor - IPexpert
> > >>>
> > >>> FREE CCIE training: http://bit.ly/vLecture
> > >>>
> > >>> Mailto: markom_at_ipexpert.com
> > >>> Telephone: +1.810.326.1444
> > >>> Web: http://www.ipexpert.com/
> > >>>
> > >>> On Wed, Feb 2, 2011 at 09:03, Asfer Shah <s_asfar_at_hotmail.com>
> > >>> wrote:
> > >>>> Hello ,
> > >>>> I have a Query to which no one have answered so far ??
> > >>>>
> > >>>> PE2-PE3 are in AS20 and are MP-iBGP neighbor to each other.
> > >>>> CE1 and CE2 are two sites connected to PE2 and PE3 respectively
> > >>>> talking
> > >>>> through the MPLS VPN cloud.
> > >>>> The multicast distribution trees are also configured and the
> Intra-
> > >>>> AS
> > >>>> multicast end-to-end is working smoothly fine between CE1-CE2.
> > >>>>
> > >>>> I have the below topology in which I have a trouble.
> > >>>>
> > >>>>
> > >>>>
> > >>>> INT---------PE1--------PE2-------PE3--------CE1
> > >>>> | |
> > >>>> | |
> > >>>> PE4 CE2
> > >>>>
> > >>>>
> > >>>> Now,I have PE1 in AS 10 which is gateway to the internet and is
> > >>>> peering
> > >> with
> > >>>> PE2 for ipv4 (add-fam) only.
> > >>>> I have PE4 in (AS30) which is peering with PE1 for both ipv4
> and
> > >>>> vpnv4
> > >>>> (add-families)
> > >>>> PE4 is Multihop Mp-eBGP neighbor to both the PE2 and PE3.
> > >>>>
> > >>>> PE1 is advertising the internet (0.0.0.0 in vpnv4 add family)
> to
> > >>>> PE4 and
> > >> then
> > >>>> PE4 is throwing it to PE2 and PE3
> > >>>> After manipulating the Next-Hop , PE2 and PE3 do watch the
> internet
> > >> default
> > >>>> vpnv4 route 0.0.0.0 coming from PE1 and they do access the
> internet
> > >> easily.
> > >>>>
> > >>>> At this point when I check back the multicast between CE1 and
> > >>>> CE2 , it
> > >> will
> > >>>> stop working and the traffic is dropped
> > >>>> The momnet , I remove the 0.0.0.0 route adver in the vpnv4 from
> > >>>> PE1 , my
> > >>>> multicast will run perfectly fine.
> > >>>>
> > >>>> There is PIM running between PE1 PE2 and PE4 but no solution
> to the
> > >> problem
> > >>>> till date !!
> > >>>> Can you please help me in this special problem ???
> > >>>>
> > >>>>
> > >>>> Blogs and organic groups at http://www.ccie.net
> > >>>>
> > >>>>
> _______________________________________________________________________
> > >>>> Subscription information may be found at:
> > >>>> http://www.groupstudy.com/list/CCIELab.html
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >> <CE1.cfg><CE2.cfg><PE1.cfg><PE2.cfg><PE3.cfg><PE4.cfg><PE5.cfg>
> > >>
> > >>
> > >> Blogs and organic groups at http://www.ccie.net
> > >>
> > >>
> _______________________________________________________________________
> > >> Subscription information may be found at:
> > >> http://www.groupstudy.com/list/CCIELab.html
> > >
> > >
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> > >
> > >
> _______________________________________________________________________
> > > Subscription information may be found at:
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> >
> >
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> >
> >
> _______________________________________________________________________
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Received on Sun Feb 06 2011 - 11:56:24 ART