Abstract: In one embodiment, a method is performed. A device may include an interface in communication with a network. The device may determine whether an all-active multi-homed ethernet segment (ES) associated with the interface is enabled. On a condition that an all-active multi-homed ES is enabled, the device may determine an ethernet virtual private network (EVPN) designated forwarder (DF) state of the all-active multi-homed ES. If the all-active multi-homed ES is enabled and has an ethernet virtual private network (EVPN) designated forwarder (DF) state, the device may enter a protocol independent multicast (PIM) designated router (DR) state. If an all-active multi-homed ES is enabled and does not have an EVPN DF state, the device may enter a PIM non-DR state.

Abstract: In one embodiment, a method is performed. A device may include an interface in communication with a network. The device may determine whether an all-active multi-homed ethernet segment (ES) associated with the interface is enabled. On a condition that an all-active multi-homed ES is enabled, the device may determine an ethernet virtual private network (EVPN) designated forwarder (DF) state of the all-active multi-homed ES. If the all-active multi-homed ES is enabled and has an ethernet virtual private network (EVPN) designated forwarder (DF) state, the device may enter a protocol independent multicast (PIM) designated router (DR) state. If an all-active multi-homed ES is enabled and does not have an EVPN DF state, the device may enter a PIM non-DR state.

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

Abstract: In one embodiment, a first Protocol Independent Multicast (PIM) router includes port interfaces to receive multicast traffic from a first network and forward the traffic to at least one receiver, which is in a sub-network including other PIM routers, and a routing processor configured, in response to a decision for the first PIM router to relinquish being a designated router, to generate a PIM Hello message with a first option descriptor and a first priority, the first option descriptor indicating a staggered handoff process, and send the PIM Hello message, receipt of the PIM Hello message by the other PIM routers being operative to result in a designated router election electing a new designated router, the new designated router being operative to initiate the staggered handoff process causing the first PIM router to continue forwarding traffic until the new designated router has built a multicast routing tree.

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

Abstract: In one embodiment, a method is performed. A device may include an interface in communication with a network. The device may determine whether an all-active multi-homed ethernet segment (ES) associated with the interface is enabled. On a condition that an all-active multi-homed ES is enabled, the device may determine an ethernet virtual private network (EVPN) designated forwarder (DF) state of the all-active multi-homed ES. If the all-active multi-homed ES is enabled and has an ethernet virtual private network (EVPN) designated forwarder (DF) state, the device may enter a protocol independent multicast (PIM) designated router (DR) state. If an all-active multi-homed ES is enabled and does not have an EVPN DF state, the device may enter a PIM non-DR state.

Abstract: In one embodiment, a first Protocol Independent Multicast (PIM) router includes port interfaces to receive multicast traffic from a first network and forward the traffic to at least one receiver, which is in a sub-network including other PIM routers, and a routing processor configured, in response to a decision for the first PIM router to relinquish being a designated router, to generate a PIM Hello message with a first option descriptor and a first priority, the first option descriptor indicating a staggered handoff process, and send the PIM Hello message, receipt of the PIM Hello message by the other PIM routers being operative to result in a designated router election electing a new designated router, the new designated router being operative to initiate the staggered handoff process causing the first PIM router to continue forwarding traffic until the new designated router has built a multicast routing tree.

Abstract: In one embodiment, a first Protocol Independent Multicast (PIM) router includes port interfaces to receive multicast traffic from a first network and forward the traffic to at least one receiver, which is in a sub-network including other PIM routers, and a routing processor configured, in response to a decision for the first PIM router to relinquish being a designated router, to generate a PIM Hello message with a first option descriptor and a first priority, the first option descriptor indicating a staggered handoff process, and send the PIM Hello message, receipt of the PIM Hello message by the other PIM routers being operative to result in a designated router election electing a new designated router, the new designated router being operative to initiate the staggered handoff process causing the first PIM router to continue forwarding traffic until the new designated router has built a multicast routing tree.

Abstract: In one embodiment, a first Protocol Independent Multicast (PIM) router includes port interfaces to receive multicast traffic from a first network and forward the traffic to at least one receiver, which is in a sub-network including other PIM routers, and a routing processor configured, in response to a decision for the first PIM router to relinquish being a designated router, to generate a PIM Hello message with a first option descriptor and a first priority, the first option descriptor indicating a staggered handoff process, and send the PIM Hello message, receipt of the PIM Hello message by the other PIM routers being operative to result in a designated router election electing a new designated router, the new designated router being operative to initiate the staggered handoff process causing the first PIM router to continue forwarding traffic until the new designated router has built a multicast routing tree.