US 12,452,159 B2
Advertisement of selective EVPN routes based on route types
Piyush Sharma, Gurgaon (IN); Param Preet Singh Dhillon, Sri Ganganagar (IN); Varun Munjal, Gurgaon (IN); and Anil Dharmshaktu, New Delhi (IN)
Assigned to Ciena Corporation, Hanover, MD (US)
Filed by Ciena Corporation, Hanover, MD (US)
Filed on Oct. 17, 2023, as Appl. No. 18/488,211.
Claims priority of application No. 202311058643 (IN), filed on Sep. 1, 2023.
Prior Publication US 2025/0080452 A1, Mar. 6, 2025
Int. Cl. H04L 45/02 (2022.01); H04L 45/033 (2022.01)
CPC H04L 45/04 (2013.01) [H04L 45/033 (2022.05)] 17 Claims
OG exemplary drawing
 
1. A router configured to send an advertisement of selective Ethernet Virtual Private Network (VPN) (EVPN) routes based on Route Types, the router comprising circuitry configured to:
determine a requirement for a route refresh from a Border Gateway Protocol (BGP) peer for a subset of Route Types of all of the Route Types, wherein the Route Types include any of Route Types 1 to 8 including RT-1—Ethernet Auto-Discovery (A-D) route, RT-2—MAC/IP Advertisement route, RT-3—Inclusive Multicast Ethernet Tag route, RT-4—Ethernet Segment route, RT-5—IP prefix route, RT-6—selective Multicast Ethernet Tag route, RT-7—NLRI to sync IGMP joins, and RT-8—NLRI to sync IGMP leaves,
negotiate with the BGP peer to support the route refresh message with the indication of the subset of Route Types, using a bitmask for each Route Type 1 to 8,
send a route refresh message to the BGP peer with an indication of the subset of Route Types, based on the negotiated support, and
receive updated routes from the BGP peer only for the subset of Route Types.