This read-write Percents value sets the yellow (warning) utilization threshold, as a percentage, for the IPv6 fast-forwarding table, intended to trigger before the more severe red boundary is reached. It gives admins a tiered early-warning system for IPv6 forwarding-table capacity, letting them react at a lower urgency level than the red threshold. For instance, setting yellow to 70 percent lets an admin get an earlier heads-up on growing IPv6 route counts well before hitting the 90 percent red boundary.