公开(公告)号：US11057235B1

公开(公告)日：2021-07-06

申请号：US16790640

申请日：2020-02-13

Applicant: Juniper Networks, Inc.

Inventor： Venkata Lakshmana Murthy Varahabhotla ,  Robert W. Kebler ,  Rahul Unnikrishnan

IPC: H04L12/18 ,  H04L1/08 ,  H04L29/08

Abstract: The potential problem of sending (or resending) PIM join/prune messages (referred to as “PIM join(s)”) too infrequently may be solved by: (a) sending a PIM join, including a unique message identifier value, to an upstream PIM peer; (b) responsive to sending the PIM join, (1) starting a quick refresh timer, and (2) starting a standard refresh timer, which is longer than the quick refresh timer; (c) responsive to a determination that the quick refresh timer expired, (1) resending the PIM join to the upstream PIM peer, and (2) restarting the quick refresh timer; (d) responsive to a determination that the standard refresh timer expired, (1) resending the PIM join message to the upstream PIM peer, and (2) restarting the standard refresh timer; (e) receiving a PIM join response from the upstream PIM peer, wherein the PIM join response includes a unique message identifier value; (f) responsive to receiving the PIM join response and determining that the unique message identifier value in the PIM join response matches the unique message identifier value in the PIM join/prune message, stopping the quick refresh timer. The potential problem of sending (or resending) PIM joins too frequently may be solved by having the PIM join response further include a long refresh timer value, and responsive to receiving the PIM join response from the upstream peer, further (1) stopping the standard refresh timer, and (2) starting a long fresh timer using the long refresh timer value, and responsive to determining that the long refresh timer expired, (1) resending the PIM join/prune message to the upstream PIM peer, and (2) restarting the long refresh timer.

公开(公告)号：US11070386B2

公开(公告)日：2021-07-20

申请号：US16677510

申请日：2019-11-07

Applicant: Juniper Networks, Inc.

Inventor： Robert W. Kebler ,  Rahul Unnikrishnan ,  Venkata Lakshmana Murthy Varahabhotla

IPC: H04L12/18 ,  H04L12/801

Abstract: The potential problem of too many unique protocol independent multicast (PIM) joins (corresponding to unique (Source, Group) combinations) in PIM join/prune messages being received by a router may be solved by controlling (e.g., limiting) a number of unique PIM joins to be sent to the router from a downstream device. This may be accomplished, for example, by communicating a limit (or multiple different limits) from a PIM device to one or more downstream PIM neighbors. For example, the limit may be encoded in a PIM Hello message (e.g., as an Option Type-Length-Value (TLV)).

公开(公告)号：US20210144019A1

公开(公告)日：2021-05-13

申请号：US16677510

申请日：2019-11-07

Applicant: Juniper Networks, Inc.

Inventor： Robert W. Kebler ,  Rahul Unnikrishnan ,  Venkata Lakshmana Murthy Varahabhotla

IPC: H04L12/18 ,  H04L12/801

Abstract: The potential problem of too many unique protocol independent multicast (PIM) joins (corresponding to unique (Source, Group) combinations) in PIM join/prune messages being received by a router may be solved by controlling (e.g., limiting) a number of unique PIM joins to be sent to the router from a downstream device. This may be accomplished, for example, by communicating a limit (or multiple different limits) from a PIM device to one or more downstream PIM neighbors. For example, the limit may be encoded in a PIM Hello message (e.g., as an Option Type-Length-Value (TLV)).