It is not the network devices per se, it is additional configuration, security, MSDP peering, etc, i.e. OPEX Business justification for such effort is not obvious, (most of multicast deployments I have done in my previous life were because I loved the technology, not because of business needs :)) Cheers, Jeff -----Original Message----- From: Octavio Alvarez <alvarezp@alvarezp.ods.org> Date: Tuesday, September 2, 2014 at 8:43 AM To: "nanog@nanog.org" <nanog@nanog.org> Subject: Re: Multicast Internet Route table.
On 09/02/2014 05:46 AM, John Kristoff wrote:
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.
Why would that be, are network devices not able to support multicast?
I have never used interdomain multicast but I imagine the global m-routing table would quickly become large.