Refer to the exhibit. Tier 1 ISP A is connected to small Tier 3 ISP B. The EBGP routing protocol is used for route exchange. The networking team at ISP A noticed the flapping of BGP sessions with ISP B. The team decides to improve stability on the network by suppressing the subnet for 30 minutes when a session begins to flap. Which action must the team perform to meet this goal?

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A. Implement BGP route dampening on ISP A router R1 with the bgp dampening 15 700 1500 30 BGP route dampening, configured with the `bgp dampening` command and parameters including a `max-suppress-time` of 30 minutes, is the direct mechanism to penalize and suppress unstable routes, preventing their advertisement and thus improving network stability against flapping BGP sessions.

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B. Implement a BGP route withdraw-delay timer on ISP B router R3 with the bgp withdraw-delay 30 A BGP route withdraw-delay timer would delay the advertisement of route withdrawals, potentially leading to stale route information being used, rather than suppressing flapping routes for stability.

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C. Implement a BGP route-penalty timer on ISP A router R1 with the bgp penalty-timer 30 250 750 The `bgp penalty-timer` command with the specified arguments is not a standard or recognized BGP configuration command in Cisco IOS/IOS-XE for implementing route dampening.

Answer

D. Implement BGP route suppression on ISP A router R2 with the bgp suppression 30 600 1200 30 The `bgp suppression` command with the specified arguments is not a standard BGP command; route suppression is the outcome of BGP dampening, not a separate direct configuration command.

Refer to the exhibit. Tier 1 ISP A is connected to small Tier 3 ISP B. The EBGP routing protocol is used for route exchange. The networking team at ISP A noticed the flapping of BGP sessions with ISP

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