3V0-25.25: Advanced VMware Cloud Foundation 9.0 Networking

By Broadcom · Question Mode

QuestionQ44

VerifiedUnknown / not found in official Broadcom sources

An administrator configured an NSX Tier-0 gateway, but the BGP neighbor status is down. The administrator has verified:

  • The MTU is configured correctly.
  • The firewall settings have been checked.
  • The neighbor IP address and remote AS number are correct.

What should the administrator verify next?

Explanation

A BGP peering cannot establish unless the Tier-0 gateway has IP connectivity to the upstream BGP neighbor. After validating MTU, firewall policy, neighbor address, and AS configuration, verify reachability across the upstream network, such as by pinging the neighbor address. Broadcom’s NSX BGP troubleshooting guidance directs administrators to test neighbor connectivity and then investigate BGP control-packet filtering and configuration if needed.

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