All things related to multicast

[Garret Peirce <>]

I could imagine some may allow it internally, but I've always blocked it with RP accept-register and MSDP SA filters both internally and externally.

RFC3171 mentions this block assigned for 'ST groups' (streaming) at the time it was assigned.

Later this block was re-assigned by RFC5771.

RESERVED (224.1.0.0-224.1.255.255 (224.1/16))   Reference  RFC5771 
No new assignments are being made in this range for the time being.
224.1.0.38  dantz   [Richard_Zulch]   2004-05-01

I've not touched Retrospect in decades, but it appears they're still making use of it today:
"...The packet format conforms to the proprietary Retrospect protocol Piton (for PIpelined TransactiONs), which gives Retrospect much of its network speed and reliability. Multicast Piton Name Service uses the assigned address 224.1.0.38, which allows Piton to direct its queries only to those computers running Retrospect Client software."

On Thu, Jul 18, 2013 at 4:46 PM, Michael H Lambert <> wrote:

Does anyone know a reason why 224.1.0.38 (Retrospect) should be announced via MSDP?  I haven't found it in any filter list recommendations, but it seems like it should be local.

Michael

--
Garry Peirce
Network Architect
Networkmaine, University of Maine System
1-207-561-3539