IF there is a valid SR Policy (N, C) where N is an IPv4 or IPv6
           endpoint address and C is a color;
       Steer into SR Policy (N, C);
   ELSE IF there is a valid SR Policy (null endpoint, C)
           of the same address-family of N;
       Steer into SR Policy (null endpoint, C);
   ELSE IF there is any valid SR Policy
           (any address-family null endpoint, C);
       Steer into SR Policy (any null endpoint, C);
   ELSE IF there is any valid SR Policy (any endpoint, C)
           of the same address-family of N;
       Steer into SR Policy (any endpoint, C);
   ELSE IF there is any valid SR Policy
           (any address-family endpoint, C);
       Steer into SR Policy (any address-family endpoint, C);
   ELSE;
       Steer on the IGP path to the next-hop N.