Azure VNET Connectivity Options

We can connect 2 VNET using following options:

  • VNET Peering
  • VPN Gateway

VNET Peering

VNET Peering is the best option as it gives fastest connectivity using the Microsoft backbone infrastructure using Private addresses.

There are 2 types of VNET Peering:

  • VNET Peering for same region connectivity
  • Global VNET Peering for different region connectivity

VPN Gateway

If you have one of the VNET in an On-Premise then you can choose the VPN Gateway option.  It also offers Encryption which could make a decision.

However VPN Gateway will be slower compared with Peering, More Configuration & More Setup Time overheads exists.

Comparison

Description VNET Peering VPN Gateway
Easy Setup Yes No
Encryption No Yes
Cross-Region Support Yes Yes
Pricing Less More
Speed High Low
Bandwidth Limit No Yes
Public IP No Yes
On-Premise Support Complicated Yes

References

https://azure.microsoft.com/en-us/blog/vnet-peering-and-vpn-gateways/