[152630] in North American Network Operators' Group
Re: mulcast assignments
daemon@ATHENA.MIT.EDU (Jeff Tantsura)
Fri May 4 02:53:49 2012
From: Jeff Tantsura <jeff.tantsura@ericsson.com>
To: Nick Hilliard <nick@foobar.org>
Date: Fri, 4 May 2012 02:53:00 -0400
In-Reply-To: <4FA30798.2080503@foobar.org>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi,
All modern routers support mapping from IGMPv2 to PIM SSM, all static, some=
others thru DNS, etc
Regards,
Jeff
On May 3, 2012, at 12:34 PM, "Nick Hilliard" <nick@foobar.org> wrote:
> On 03/05/2012 21:00, Greg Shepherd wrote:
>> Sure, but GLOP predated SSM, and was really only an interim fix for
>> the presumed need of mcast address assignments. GLOP only gives you a
>> /24 for each ASN where SSM gives you a /8 for every unique unicast
>> address you have along with vastly superior security and network
>> simplicity.
>=20
> SSM is indeed a lot simpler and better than GLOP in every conceivable way=
-
> except vendor support. It needs igmpv3 on all intermediate devices and S=
SM
> support on the client device. All major desktop operating systems now ha=
ve
> SSM support (OS/X since 10.7/Lion), but there is still lots of older
> hardware which either doesn't support igmpv3 or else only supports it in =
a
> very primitive fashion. This can lead to Unexpected Behaviour in naive
> roll-outs.
>=20
> Nick
>=20
