This mode is termed linear because it is similar in operation to traditional 1-for-1 linear protection switching. It is intended to allow one or more backup paths to protect a primary path, with fast failover between candidate paths. Uniform failover is supported between candidate paths of the same SR policy. Only one segment list from each of the top-three preference candidate paths is programmed in the IOM. All of the programmed candidate paths of a specified SR policy are in the same protection group. See Figure 1.
Figure 1. Linear Protected SR Policy with S-BFD
