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Gorik_S's avatar
Gorik_S
Copper Contributor
Dec 11, 2023

Azure vwan - default subnetmasks

Hello

 

I have a question regarding  the default subnetmasks assigned to the subnets in Vwan.

According to the Vwan FAQ documentation https://learn.microsoft.com/en-us/azure/virtual-wan/virtual-wan-faq#what-is-the-recommended-hub-address-space-during-hub-creation a /23 is recommended for the vnet. And it mentions that when using an NVA that the nva subnet will be a /28 or /27 (with multiple NVAs).

But what are the default subnetmasks for the ExpressRoute, site-to-site VPN, point-to-site VPN, Azure Firewall and Virtual hub Router subnets? a /27?

Is it also /27 when using a vwan hub address space of /24?

 

Is it correct to assume that when picking a /16 network address space for the vwan hub that the subnets will become /24?

 

Thank you for any extra information regarding this topic.

 

 

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