Azure Networking - Cost Drivers
Ingress is not charged
egress is charged
anything originating the Azure subscription and exiting the Azure backplane is charged.
e.g: uploading 10GB of data to Azure storage, you are not charged.
e.g.: Downloading 10GB of data to Azure storage, you are charged.
VNET peering costs
connecting vnets without having to implement vent-vnet vpn
works within the same azure region as well as cross regions
both ingress and egress are charged
VPN
If you are connecting vnets using vpn or on-prem using vpn then pricing depends on gateway sku
Express Route
Pricing
Amount of bandwidth
Plan you sign up for
Region
metered
unmetered
inbound not charged,
all outbound data is charged
Inbound not charged,
outbound data is not charged
Demystifying network and traffic chages
Free
Paas offering - service to service in the same region - Free
same vnet - Free
Charged
Cross region - Service to Service
Outbound is charged, inbound is not charged
VMs - Outbound to Internet from Azure
Incoming traffic to Azure VMs from Internet
VPN between 2 vnets in the same region
Charges for the VPN resources
Traffic between vnets with vpn
VNET-VNET vpn across regions
Charges for the VPN resources+egress charges
Express route - Egress charged unless its unmetered, ingress not charged
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Vnet peering same region or global both ingress and egress charged