US 12,218,818 B1
Multicast liveness detection
Venkata Srikanth Gandiboyina, Cupertino, CA (US); Saravanan Deenadayalan, San Jose, CA (US); Swamy Sadashivaiah Renu Kananda, Tracy, CA (US); Nishant Sharma, Cupertino, CA (US); and Vikram P. Rautela, Morgan Hill, CA (US)
Assigned to Juniper Networks, Inc., Sunnyvale, CA (US)
Filed by Juniper Networks, Inc., Sunnyvale, CA (US)
Filed on Jun. 20, 2023, as Appl. No. 18/337,641.
Int. Cl. H04L 43/12 (2022.01); H04L 45/74 (2022.01); H04L 65/611 (2022.01)
CPC H04L 43/12 (2013.01) [H04L 45/74 (2013.01); H04L 65/611 (2022.05)] 16 Claims
OG exemplary drawing
 
1. A method, comprising:
obtaining, by an ingress component of a first packet forwarding device, a probe packet associated with a multicast packet;
transmitting, from the ingress component and through an egress component of the first packet forwarding device, the probe packet to a multicast replication component of the first packet forwarding device;
replicating, by the multicast replication component associated with the egress component of the first packet forwarding device, the probe packet at least two times to form multiple copies of the probe packet,
wherein a first replication generates a set of first copies of the probe packet, of the multiple copies of the probe packet, that is associated with a fabric replication of the probe packet, and
wherein a second replication generates a set of second copies of the probe packet, of the multiple copies of the probe packet, that is associated with local replications, of the probe packet, that is associated with each wide area network (WAN) port on a local replication list,
wherein the set of second copies egress via the WAN ports associated with the first packet forwarding device;
transmitting, by the first packet forwarding device to the first packet forwarding device the set of second copies of the probe packet;
transmitting, by the first packet forwarding device to multiple other packet forwarding devices, the set of first copies of the probe packet;
receiving, by the first packet forwarding device, the set of second copies of the probe packet, and multiple response packets,
wherein each of the multiple response packets originates at a respective one of the multiple other packet forwarding devices based on a respective one of the multiple other packet forwarding devices receiving one of the set of first copies of the probe packet; and
determining, based on the set of second copies of the probe packet and the multiple response packets, a status of multiple links associated with the first packet forwarding device.