US Patent No. 10,243,754

PROTOCOL INDEPENDENT MULTICAST DESIGNATED ROUTER NOTIFY DELAY FEATURE


Patent No. 10,243,754
Issue Date March 26, 2019
Title Protocol Independent Multicast Designated Router Notify Delay Feature
Inventorship Xiaoyan Chang, Santa Clara, CA (US)
John French, Santa Clara, CA (US)
Prashant Srinivas, Santa Clara, CA (US)
Maxim Martynov, Santa Clara, CA (US)
Srinivas Subramanian, Santa Clara, CA (US)
Yu Iu, Santa Clara, CA (US)
Assignee Arista Networks, Inc., Santa Clara, CA (US)

Claim of US Patent No. 10,243,754

1. A method for reducing multicast traffic loss comprising:configuring, on a primary designated router (DR), a DR parameter comprising a value, wherein the primary DR comprises a first configured DR priority;
sending to a secondary DR that is performing DR functionality, after a Protocol Independent Multicast (PIM) interface of the primary DR comes up, a first PIM hello message comprising a default DR priority that is lower than a second configured priority of the secondary DR;
sending to the secondary DR, after the primary DR reaches a system up state, a second PIM hello message comprising the default DR priority;
performing DR functionality, by the primary DR, after the primary DR reaches the system up state; and
sending to the secondary DR, after waiting a time period corresponding to the value of the DR parameter, a third PIM hello message comprising the first configured DR priority.