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Professional Cloud Network Engineer Exam - Question 119


You have provisioned a Partner Interconnect connection to extend connectivity from your on-premises data center to Google Cloud. You need to configure a Cloud Router and create a VLAN attachment to connect to resources inside your VPC. You need to configure an Autonomous System number (ASN) to use with the associated Cloud Router and create the VLAN attachment.

What should you do?

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Correct Answer: BD

For Partner Interconnect, the Cloud Router must be configured with a local ASN that matches Google's public ASN 16550. Using a public ASN is required to establish proper connectivity with Google Cloud. Options suggesting private ASNs (4-byte or 2-byte) are not recommended as they are typically used for internal, private networks rather than interfacing directly with Google's network infrastructure. Using another public ASN, such as 15169, is also incorrect since 16550 is specifically designated for this purpose.

Discussion

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nosenseOption: D
Dec 1, 2022

seems that D Create Cloud Routers For Partner Interconnect, all Cloud Routers must have a local ASN of 16550. source: https://cloud.google.com/network-connectivity/docs/interconnect/tutorials/partner-creating-9999-availability

ccieman2016Option: D
Dec 6, 2022

100% for sure, I did it last month

Komal697Option: D
Mar 31, 2023

D is correct because for Partner Interconnect, all Cloud Routers must have a local ASN of 16550, which is a public Google ASN. Option D suggests using a public Google ASN of 16550, which is the correct approach. Options A and B suggest using private ASNs, which is not recommended. Option C suggests using a public Google ASN of 15169, which is not valid for Partner Interconnect.

xhilmi
Dec 26, 2023

Nice explain, thanks

AzureDP900Option: D
Dec 3, 2022

D is right Create two Cloud Routers, one in each region. For Partner Interconnect, all Cloud Routers must have a local ASN of 16550.

AzureDP900
Dec 12, 2022

https://cloud.google.com/network-connectivity/docs/interconnect/tutorials/partner-creating-9999-availability

playpacmanOption: D
Dec 2, 2022

Yes D it is on GC side, B you can pick for the other end.

pfilourencoOption: D
Dec 6, 2022

D is right

pk349Option: D
Jan 14, 2023

• D. Use a public Google ASN ***** 16550. Create Cloud Routers Create two Cloud Routers, one in each region. For Partner Interconnect, all Cloud Routers must have a local ASN of 16550.

AfonyaOption: D
Feb 25, 2024

https://cloud.google.com/network-connectivity/docs/interconnect/tutorials/partner-creating-9999-availability#create-cloud-routers

ruvindalOption: B
Jul 12, 2024

The correct answer is B. Use a 2-byte private ASN 64512-65535. Here's why: Private ASNs are used for internal networks and are not routable on the public internet. This is ideal for connecting your on-premises network to your Google Cloud VPC. Public ASNs are used for networks that are publicly routable. You wouldn't want to use a public ASN for your internal connection. Specifically, the recommended private ASN range for Cloud Router in this scenario is 64512-65535.