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Exam AZ-300 topic 10 question 2 discussion

Actual exam question from Microsoft's AZ-300

Question #: 2
Topic #: 10

DRAG DROP -
You need to configure the Azure ExpressRoute circuits.
How should you configure Azure ExpressRoute routing? To answer, drag the appropriate configurations to the correct locations. Each configuration may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Select and Place:

Show Suggested Answer

Suggested Answer:

Azure compute services, namely virtual machines (IaaS) and cloud services (PaaS), that are deployed within a virtual network can be connected through the private peering domain. The private peering domain is considered to be a trusted extension of your core network into Microsoft Azure.
Services such as Azure Storage, SQL databases, and Websites are offered on public IP addresses. You can privately connect to services hosted on public IP addresses, including VIPs of your cloud services, through the public peering routing domain. You can connect the public peering domain to your DMZ and connect to all Azure services on their public IP addresses from your WAN without having to connect through the internet.
References:
https://docs.microsoft.com/en-us/azure/expressroute/expressroute-circuit-peerings

by dfrye at Feb. 8, 2020, 3:08 p.m.

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Avanade2023

Highly Voted 5 years, 3 months ago

Box 1 is BGP Communities: Reffer to: https://docs.microsoft.com/en-us/azure/expressroute/expressroute-optimize-routing#suboptimal-routing-from-customer-to-microsoft Box 2 is public AS numbers (correct): https://docs.microsoft.com/en-us/azure/expressroute/expressroute-optimize-routing#suboptimal-routing-from-microsoft-to-customer *Important: "We remove private AS numbers in the AS PATH for the prefixes received on Microsoft Peering when peering using a private AS number. You need to peer with a public AS and append public AS numbers in the AS PATH to influence routing for Microsoft Peering."

upvoted 42 times

denkes

5 years ago

Perfect Link! Thank you! It clearly explain for Box1 "BGP Communities" and Box 2 "public AS".

upvoted 3 times

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praveen97

4 years, 11 months ago

Agree with PeterWL

upvoted 1 times

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Freddo

4 years, 9 months ago

Agree. https://docs.microsoft.com/en-us/azure/expressroute/expressroute-optimize-routing#path-selection-on-microsoft-and-public-peerings

upvoted 1 times

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dfrye

Highly Voted 5 years, 4 months ago

Box 2 is incorrect, should be BGP comminities

upvoted 18 times

Myk

5 years, 4 months ago

Yes. I think your right. https://docs.microsoft.com/en-us/azure/expressroute/expressroute-optimize-routing

upvoted 5 times

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milind8451

5 years, 1 month ago

Yes, agree with you.

upvoted 2 times

SIDNEY1

5 years, 1 month ago

Incorrect. From the link @Myk posted: Customer to MS - BGP communities MS to customer - *public* AS PATH prepending

upvoted 5 times

tartar

4 years, 9 months ago

Box1 - BGP Communities Box 2 - public AS

upvoted 2 times

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tashakori

Most Recent 1 year, 3 months ago

- Box 1 is BGP Communities - Box 2 is public AS numbers

upvoted 1 times

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tashakori

1 year, 3 months ago

Box1 - BGP Communities Box 2 - public AS

upvoted 1 times

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mudjinja

4 years, 9 months ago

Given answer are correct. A.Datum to Azure is private peering. You need to use your private AS to config BGP peering with ExpressRoute AS

upvoted 1 times

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Prash85

5 years ago

Tested. 1st one is correct with Private. 2nd one is Local since it comes under Microsoft Peering

upvoted 3 times

denkes

5 years ago

This is not correct. See Post above from Peter WL.

upvoted 5 times

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Happiman

5 years, 3 months ago

Box1: BGP Community Box2: BGP AS Prepending

upvoted 7 times

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haim

5 years, 4 months ago

https://docs.microsoft.com/en-us/azure/expressroute/expressroute-optimize-routing

upvoted 1 times

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haim

5 years, 4 months ago

I agree with MYK for the first bit -> customer to microsoft (i.e. ADdatum to msft)should always be bgp communities. 2. from msft to addatum would is public AS

upvoted 5 times

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