US 9,813,253 B2
Network device configured to track multicast receivers
Jayant Kotalwar, Cupertino, CA (US); Andrew Dolganow, Ottawa (CA); and Gitesh Patel, Fremont, CA (US)
Assigned to Alcatel Lucent, Boulogne-Billancourt (FR)
Filed by Alcatel-Lucent USA Inc., Murray Hill, NJ (US)
Filed on Aug. 10, 2016, as Appl. No. 15/233,162.
Application 15/233,162 is a continuation of application No. 14/454,271, filed on Aug. 7, 2014.
Prior Publication US 2016/0352529 A1, Dec. 1, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 12/18 (2006.01); H04L 12/46 (2006.01); H04L 12/751 (2013.01); H04L 12/723 (2013.01); H04L 12/801 (2013.01); H04L 12/761 (2013.01)
CPC H04L 12/18 (2013.01) [H04L 12/185 (2013.01); H04L 12/4633 (2013.01); H04L 12/4641 (2013.01); H04L 45/02 (2013.01); H04L 45/16 (2013.01); H04L 45/50 (2013.01); H04L 47/10 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a first network device adapted for communication with one or more other network devices;
the first network device comprising a processor coupled to a memory;
the first network device being configured:
to originate a first route identifying a first tunnel for carrying traffic for a multicast;
to originate a second route specifying a leaf information requirement for the multicast but not initially identifying any tunnel for carrying traffic for the multicast; and
to track a plurality of receivers of the multicast based at least in part on leaf information received from the multicast receivers responsive to the specified leaf information requirement of the second route;
wherein the first route has a first tunnel attribute that identifies the first tunnel and the second route comprises a selective route having a second tunnel attribute configured to indicate that it carries no tunnel information; and
wherein the second tunnel attribute of the selective route is configured to indicate that the second route carries no tunnel information by setting a tunnel type field of the second tunnel attribute to a predetermined value.