Direct Routing - Local Media Optimization - External NAT (Trusted IP)

Jehad Jawad 236

I am planning to configure an SBC with Local Media Optimization to make the traffic of internal users goes directly to the internal IP of the SBC

In the following link:
https://learn.microsoft.com/en-us/microsoftteams/direct-routing-media-optimization

it shows that there is an "External NAT (Trusted IP)" for each subnet

Do I really need to have multiple Public IPs (one for each subnet)?

How to do it to reduce the number of Public IPs?

JimmyYang-MSFT 50,446 Reputation points Microsoft Vendor

2022-02-03T06:56:08.393+00:00

Hi @Jehad Jawad

Do I really need to have multiple Public IPs (one for each subnet)?

I am not sure. But in this official document recommendation, it shows the network setup used in the examples. You need to add these external IPs for each site where you have users using Local Media Optimization
JimmyYang-MSFT 50,446 Reputation points Microsoft Vendor

2022-02-07T08:05:45.017+00:00

@Jehad Jawad

It has been a while, how is everything going?
If you have any update about this issue, please feel free to post back.
JimmyYang-MSFT 50,446 Reputation points Microsoft Vendor

2022-02-16T10:08:19.92+00:00

@Jehad Jawad

"Is it possible to use the public IP of the SBC as Trusted IP?"

I am afraid not , external trusted IPs are the Internet external IPs of the enterprise network. These IP’s are the IP addresses used by Microsoft Teams clients when they connect to Microsoft 365. For more details about how to IP address to route to Microsoft Phone system, you could refer it.
JimmyYang-MSFT 50,446 Reputation points Microsoft Vendor

2022-02-23T10:09:35.537+00:00

@Jehad Jawad

It has been a while, how is everything going?
If you have any update about this issue, please feel free to post back.