As you all have said, to confirm, I use ssm Mcast to distribute TV from satellite down links in the headend, out to a few different remote head ends. From there it's converted back to RF video and sent to subscribers via cable or hfc plant
Aaron > On Jul 31, 2018, at 5:15 PM, Job Snijders <[email protected]> wrote: > >> On Tue, 31 Jul 2018 at 23:29, Sean Donelan <[email protected]> wrote: >> >> Its tought to prove a negative. I'm extremely confident the answer is yes, >> public internet multicast is not viable. I did all the google searches, >> check all the usual CAIDA and ISP sites. IP Multicast is used on private >> enterprise networks, and some ISPs use it for some closed services. >> >> I got sent back with a random comment from a senior official saying "but >> I heard different." I bit my tongue, and said I would double (now >> quadruple) check. >> >> If any ISPs have working IP source-routed multicast on the public >> Internet that I missed, or what I got wrong. That's what content >> distribution networks (cdn's) are for instead. > > > > AS 2914 is working to fully dismantle all its Internet multicast related > infrastructure and configs. All MSDP sessions have been turned off, we have > deny-all filters for the multicast AFI, and the RPs have been shut down. > > For years we haven’t seen actual legit multicast traffic. Also the > multicast “Default-Free Zone” has always been severely partitioned. Not all > the players were peering with each other, which led to significant > complexity for any potential multicast source. > > Reasoning behind turning it off is that it limits the attack surface > (multicast can bring quite some state to the core), reduces the things we > need to test and qualify, and by taking this off the RFPs we can perhaps > consider more vendors. > > However, as you noted; multicast within a single administrative domain > (such as an access network distributing linear TV), or confined to > purpose-built L3VPNs very much is a thing. On the public Internet multicast > seems dead. > > Kind regards, > > Job
