nanog mailing list archives
Re: IPTV and ASM
From: Keegan Holley <keegan.holley () sungard com>
Date: Thu, 29 Dec 2011 01:02:04 +0100
Isn't source discovery and efficiency a big concern for ASM? If individual streams are tied to a specific source then it's possible to live without some of the overhead involved in ASM. Joins go straight to the source, traffic is disseminated via direct paths instead of being replicated by the RP, etc etc.. Disclaimer: Other than being a lab rat I haven't done much with multicast in the wild. 2011/12/29 Jeff Tantsura <jeff.tantsura () ericsson com>
Mike, To my knowledge in most today's networks even if legacy equipment don't support IGMPv3 most likely 1st hop router does static translation and SSM upstream. The reason not to migrate to SSM is usually - ASM is already there and works just fine :) Cost to support RP infrastructure is usually the main non-technical factor to not to use ASM. Would be interested to hear from the SPs on the list. Regards, Jeff On Dec 28, 2011, at 2:19 PM, "Mike McBride" <mmcbride7 () gmail com> wrote:Marshall, On Wed, Dec 28, 2011 at 1:50 PM, Marshall Eubanks <marshall.eubanks () gmail com> wrote:Dear Mike; On Wed, Dec 28, 2011 at 4:48 PM, Mike McBride <mmcbride7 () gmail com>wrote:Anyone using ASM (versus SSM) for IPTV? If so why?From what I understand, the answer is likely to be "yes" and the reason is likely to be "deployed equipment only supports IGMP v2."Agreed. I'm seeking confirmation, from IPTV implementers, that non igmpv3 support is the reason for using ASM with IPTV. Versus other reasons such as reducing state. Or is this a non issue and everyone is using SSM with IPTV? thanks, mikeRegards Marshallthanks, mike
Current thread:
- IPTV and ASM Mike McBride (Dec 28)
- Re: IPTV and ASM Marshall Eubanks (Dec 28)
- Re: IPTV and ASM Mike McBride (Dec 28)
- Re: IPTV and ASM Jeff Tantsura (Dec 28)
- Re: IPTV and ASM Glen Kent (Dec 28)
- Re: IPTV and ASM Mark Tinka (Dec 29)
- Re: IPTV and ASM Keegan Holley (Dec 28)
- Re: IPTV and ASM Mark Tinka (Dec 29)
- Re: IPTV and ASM Mike McBride (Dec 28)
- Re: IPTV and ASM Mark Tinka (Dec 29)
- Re: IPTV and ASM Marshall Eubanks (Dec 28)
- Re: IPTV and ASM Mark Tinka (Dec 29)
- Re: IPTV and ASM Mark Tinka (Dec 29)
- Re: IPTV and ASM Curtis, Bruce (Dec 29)
- Re: IPTV and ASM Olivier Benghozi (Dec 29)