On Tue, 2 Sep 2014 04:47:37 +0000 "S, Somasundaram (Somasundaram)" <somasundaram.s@alcatel-lucent.com> wrote:
1: Does all the ISP's provide Multicast Routing by default?
No not all and even those that do often do not do so on the same gear, links and peers as their unicast forwarding.
2: Is there any placeholder where one can get to know the Multicast Internet Route table (usage, stability etc) just like Unicast Route table (http://bgpupdates.potaroo.net)?
Marshall Eubanks at one time probably maintained the most comprehensive IP multicast status pages at http://www.multicasttech.com/status (no longer available). I've not seen nor heard from Marshall in a long time so I wouldn't expect this to come back any time soon. Sadly I don't know of any suitable replacement, but you might find some of that by searching here, if nothing else using the router proxies to examine status by hand: <http://noc.net.internet2.edu/> CAIDA used to do some, but I'm not sure they have anything active any longer, browsing their tools and data may turn up some hints to other work. The once NLANR inspired and run Beacon project hasn't completely died out, there is this I found at ja.net for instance: <http://www.beacon.ja.net/> Interdomain IP multicast has practically since the beginning been a notoriously niche and limited service compared to unicast service. There are a handful of reasons for that, but I think you will find it becoming decreasingly available rather than more so on interdomain basis. John