US 12,034,635 B2
Using and processing per slice segment identifiers in a network employing segment routing
Abhishek Deshmukh, Wilmington, MA (US); Raveendra Torvi, Nashua, NH (US); Tarek Saad, Ottawa (CA); and Vishnu Pavan Beeram, Naperville, IL (US)
Assigned to Juniper Networks, Inc., Sunnyvale, CA (US)
Filed by Juniper Networks, Inc., Sunnyvale, CA (US)
Filed on Jan. 31, 2022, as Appl. No. 17/589,539.
Application 17/589,539 is a division of application No. 16/588,556, filed on Sep. 30, 2019, granted, now 11,277,334.
Claims priority of provisional application 62/877,847, filed on Jul. 24, 2019.
Prior Publication US 2022/0182314 A1, Jun. 9, 2022
Int. Cl. H04L 45/00 (2022.01); H04L 49/00 (2022.01)
CPC H04L 45/34 (2013.01) [H04L 49/3009 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method for facilitating configuration and use of a same prefix segment identifier (SID) for either (A) more than one prefix within an interior gateway protocol (IGP) domain, or (B) one prefix with more than one path computation algorithm within the IGP domain, the computer-implemented method comprising:
a) generating, by a node in the IGP, an IGP advertisement including both (1) a prefix SID and (2) a segment routing global block (SRGB) slice identifier, wherein the prefix SID is for, and is associated with, either (A) more than one prefix within an interior gateway protocol (IGP) domain, or (B) one prefix with more than one path computation algorithm within the IGP domain;
b) transmitting, via IGP flooding, the generated IGP advertisement to all routers belonging to the IGP domain, regardless of whether or not such routers belong to the slice of the SR domain identified by the SRGB slice identifier.