US 11,863,350 B2
Fast convergence of E-Tree with a dual homed root node
Sami Boutros, Union City, CA (US); Muthurajah Sivabalan, Kanata (CA); and David Gilson, Honolulu, HI (US)
Assigned to Ciena Corporation, Hanover, MD (US)
Filed by Ciena Corporation, Hanover, MD (US)
Filed on Sep. 9, 2021, as Appl. No. 17/470,315.
Prior Publication US 2023/0073266 A1, Mar. 9, 2023
Int. Cl. H04L 12/46 (2006.01); H04L 12/44 (2006.01); H04L 45/00 (2022.01); H04L 49/15 (2022.01); H04L 45/48 (2022.01)
CPC H04L 12/4641 (2013.01) [H04L 12/44 (2013.01); H04L 45/48 (2013.01); H04L 45/66 (2013.01); H04L 49/15 (2013.01); H04L 2012/445 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A Provider Edge (PE) node comprising:
a plurality of ports including an inter-chassis port to a second PE node, a port connected to a root node, and one or more ports connected to leaf nodes, wherein the plurality of ports are in an Ethernet Tree (E-Tree) where Ethernet frames from a root node are received by any other root node or leaf node, and Ethernet frames from a leaf node are received only by a root node, and wherein the root node is dual-homed to the PE node and the second PE node;
switching circuitry configured to switch traffic between the plurality of ports; and
circuitry configured to
designate the inter-chassis port as one of a leaf node and a root node in the E-Tree, wherein the inter-chassis port forms a connection between the PE node and the second PE node with the connection being a link in the E-Tree, and
manage a designation of the inter-chassis port based on a status of the port connected to the root node.