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Answer: Verify that you have configured the on-premises router's subinterface with a subnet mask of /31., From the Google Cloud console, run gcloud compute interconnects get-diagnostics to verify the Address Resolution Protocol (ARP) learned.
To resolve the BGP session issue, it's crucial to ensure the on-premises router's subinterface is correctly configured with a /31 subnet mask (Option B) for proper VLAN attachment compatibility. Additionally, verifying the ARP entries through the `gcloud compute interconnects get-diagnostics` command (Option E) is essential to confirm layer 2 connectivity. These steps address the most common causes of BGP session establishment failures.
Author: LeetQuiz Editorial Team
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You have set up a Cloud Interconnect connection with a VLAN attachment and configured BGP between your on-premises router and Cloud Router. However, the BGP session fails to establish. Which two steps should you take to troubleshoot and resolve this issue? (Choose two.)
A
From the Google Cloud console, run gcloud compute routers get-status to verify the Address Resolution Protocol (ARP) learned.
B
Verify that you have configured the on-premises router's subinterface with a subnet mask of /31.
C
Verify that you have configured the on-premises router's eBGP multihop with a minimum hop length of 4.
D
Verify that you have configured the on-premises router's BGP security parameters to use MD5 authentication.
E
From the Google Cloud console, run gcloud compute interconnects get-diagnostics to verify the Address Resolution Protocol (ARP) learned.
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