Re: mcast tshoot tips?

Wowsers!!! A nice link and some good info.

Dave, I forgot about the 'active' keyword at the end of the mroute command
... that sure is helpful and I used to use that command a lot when I used to
work with mcast on my job ...

From Jason:

http://blog.ine.com/2010/09/17/troubleshooting-multicast-routing/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+ine+%28INE+CCIE+Blog%29

Some good reading this will be.

Thank you team. I will have some more playtime tomorrow ... it is past my
bedtime now ;-)

Chat soon and thanks again!!!

On Sun, May 1, 2011 at 10:58 PM, Jason Witover <jwitover_at_itproserv.com>wrote:

> I find this a helpful link:
>
> http://blog.ine.com/2010/09/17/troubleshooting-multicast-routing/?utm_sourc
> e=feedburner&utm_medium=feed&utm_campaign=Feed%3A+ine+%28INE+CCIE+Blog%29<http://blog.ine.com/2010/09/17/troubleshooting-multicast-routing/?utm_sourc%0Ae=feedburner&utm_medium=feed&utm_campaign=Feed%3A+ine+%28INE+CCIE+Blog%29>
>
>
>
> On 5/1/11 9:17 PM, "ALL From_NJ" <all.from.nj_at_gmail.com> wrote:
>
> >Hey team,
> >
> >Was doing some mcast tshooting today, and wanted to get some ideas or
> >links
> >that you think will be helpful for the lab and tshoot section. I am
> >worried
> >about the amount of time, and complexity of this ... especially since in
> >the
> >config section of the lab, this mcast technology will 'sit on top of' the
> >other technologies I have already configured; IGPs, etc ...
> >
> >On the RP:
> >Whenever you add a source or destination, it should show up in the mroute
> >table. So in this way, you can tshoot either the source or group
> >membership
> >problems. Which direction has the problem; from the source or from the
> >join-group? For those who want to lab this, try it since it is a quick
> >lab
> >test. Add a source or join-group, and then check the RP's table. It is
> >quite cool to see this show up in the mroute table.
> >
> >Team question - what is the fastest way to tell if you have a RPF failure?
> >I can imagine being in the lab and getting confused with topology and
> >direction of routes.
> >
> >What is the quickest way to resolve a RPF failure? My thoughts below,
> >please add to this:
> >
> >1) Static mroute (How many routers could potentially need these static
> >mroutes?)
> >2) Admin distance, cost, etc ... or other tweaks to prefer a path without
> >removing the routes? Trying to maintain the reachability, which making
> >the
> >mcast route also the best IGP route ...
> >3) Any preferred debugs that might tell you what to configure to solve the
> >RPF failure?
> >
> >Suggestion for problem resolution: start a long ping process from the
> >source, and as you are resolving the problem, when you fixed the problem,
> >the ping will start to work. Is this a good method, anyone else try this?
> >
> >From Narbik - add loopbacks with the igmp join-group. Do this along the
> >path, and where the ping stops, there is the problem router. Any
> >additional
> >suggestions to this? Sounds like a good idea.
> >
> >Likely potential problems IMO ...
> >
> >1) PIM or ip multicast-routing not enabled
> >2) RP not reachable?
> >3) RPF failure
> >4) ACL or firewall? Should this also affect the RP not being reached?
> >Meaning ... can I skip this check if the RP is reachable and the PIM
> >messaging is working
> >5) RP not learning sources or join-groups
> >6) ???
> >
> >Team - I am worried about the time I have to resolve tshooting; caused by
> >me
> >or the tshoot section. I look forward to hearing your thoughts on this
> >matter.
> >
> >TIA team and please accept my wishes for you to have a great week!!!
> >
> >--
> >Andrew Lee Lissitz
> >all.from.nj_at_gmail.com
> >
> >
> >Blogs and organic groups at http://www.ccie.net
> >
> >_______________________________________________________________________
> >Subscription information may be found at:
> >http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net