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PROFESSIONAL-CLOUD-NETWORK-ENGINEER · Question #204

Your organization wants to set up hybrid connectivity with VLAN attachments that terminate in a single Cloud Router with 99.9% uptime. You need to create a network design for your on- premises…

The correct answer is A. Create a design that uses the LOCAL_PREF BGP attribute to influence the egress path from. In an active/passive configuration with hybrid connectivity, where only one VLAN attachment is active at a time, the LOCAL_PREF BGP attribute is used to influence the egress path from Google Cloud to the on-premises environment. LOCAL_PREF is a BGP attribute that determines the…

Submitted by rachelw· Apr 18, 2026Designing, planning, and prototyping a Google Cloud network

Question

Your organization wants to set up hybrid connectivity with VLAN attachments that terminate in a single Cloud Router with 99.9% uptime. You need to create a network design for your on- premises router that meets those requirements and has an active/passive configuration that uses only one VLAN attachment at a time. What should you do?

Options

  • ACreate a design that uses the LOCAL_PREF BGP attribute to influence the egress path from
  • BCreate a design that uses an equal-cost multipath (ECMP) with flow-based hashing on your on-
  • CCreate a design that uses a BGP multi-exit discriminator (MED) attribute to influence the egress
  • DCreate a design that uses the BGP attribute to influence the egress path from Google

How the community answered

(50 responses)
  • A
    78% (39)
  • B
    6% (3)
  • C
    2% (1)
  • D
    14% (7)

Explanation

In an active/passive configuration with hybrid connectivity, where only one VLAN attachment is active at a time, the LOCAL_PREF BGP attribute is used to influence the egress path from Google Cloud to the on-premises environment. LOCAL_PREF is a BGP attribute that determines the preferred path for outgoing traffic within an autonomous system. By configuring LOCAL_PREF, you can ensure that traffic egresses through the active VLAN attachment and not the passive one. This approach provides the required active/passive configuration and ensures a reliable setup with 99.9% uptime.

Topics

#Hybrid Connectivity#Cloud Interconnect#BGP#Active/Passive Configuration

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