Home » Juniper » JN0-661 » Which policy configuration meets the requirement?
You are asked to implement route damping on a BGP router. There are two specific requirements for your implementation:
1. damp all prefixes with a mask length equal to or greater than /24 more aggressively than routes with a mask length between /17 and /23;
2. damp prefixes with a mask length between /0 and /16 less than routes with a mask length greater than /16.
Which policy configuration meets the requirement?
Correct Answer: A
Explanation/Reference:
The default half-life is 15 minutes.
The default value of suppress is 3000.
To aggressively damp prefixes we should increase half-life, to for example 30 minutes, and to decrease the damp we should lower the half-life, to for example 5.
Incorrect Answers:
B, C: The intervals in the route filter should be /0-/16 and /24-/32, not /0-/23 and /24-/32.
D: We should increase half-life, not decrease it to 5.
References: http://www.juniper.net/documentation/en_US/junos16.1/topics/usage-guidelines/policy-using-routing-policies-to-damp-bgp-routeflapping. html
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