US 12,381,808 B2
Techniques for providing role status conflict resolution with EVPN multi-homing
Chuanfa Wang, Ontario (CA); and Ali Sajassi, Alamo, CA (US)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Aug. 17, 2023, as Appl. No. 18/451,724.
Prior Publication US 2025/0062977 A1, Feb. 20, 2025
Int. Cl. H04L 45/02 (2022.01); H04L 45/74 (2022.01)
CPC H04L 45/02 (2013.01) [H04L 45/74 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, at a first provider edge device, information about a customer edge device in communication with the first provider edge device;
storing, by the first provider edge device based on the information about the customer edge device, an indication of a first role status of the customer edge device;
receiving, by the first provider edge device from a second provider edge device in communication with the customer edge device, an advertisement message that includes a second role status associated with the second provider edge device in relation to the customer edge device;
comparing, by the first provider edge device, the first role status to the second role status; and
upon determining that the first role status does not match the second role status:
if the second role status is a leaf role and the first role status is a root role, updating, by the first provider edge device, the first role status of the customer edge device to be a leaf role; and
if the second role status is a root role status and the first role status is a leaf role, generating a second advertisement message indicating the first role status; and
transmitting the second advertisement message to the second provider edge device to cause the second provider edge to update the second role status to a leaf role.