Alcatel-Lucent NRS I – Layer 2 Switching and Spanning Tree — Question 1

BGP is configured on two peers, routers A and B. Router A is configured with a Hold Time timer of 60 seconds and a Keepalive timer of 25 seconds. Router B is configured with a Hold Time timer of 90 seconds and a Keepalive timer of 70 seconds. What will the active Keepalive timer be on router B?

Answer options

• A. 70 seconds
• B. 25 seconds
• C. 20 seconds
• D. 30 seconds

Correct answer: C

Explanation

Router B will use the minimum Keepalive timer value configured between the two peers. Since router A's Keepalive timer is set to 25 seconds and router B's is set to 70 seconds, the active Keepalive timer on router B will be 20 seconds, which is the difference from the Hold Time of router A minus the Keepalive of router A.