Azure Load Balancer Vs. ExpressRoute for a redundant pair of cross connections between On-Premise and Azure Virtual Network RRS feed

  • Question

  • If we need a secure private connection between the on-premises networks and the Azure virtual networks; and that connection should offer a redundant pair of cross connections to provide high availability. Would Load Balancer be a better choice over ExpressRoute? Thanks..Nam

    • Edited by namwam Thursday, March 15, 2018 10:49 PM
    Thursday, March 15, 2018 10:48 PM

All replies

  • If you want to connect your on-premises sites securely to a virtual network, you have three different ways to do so: Site-to-Site, Point-to-Site, and ExpressRoute. Compare the different cross-premises connections that are available. The option you choose can depend on various considerations, such as:

    • What kind of throughput does your solution require?
    • Do you want to communicate over the public Internet via secure VPN, or over a private connection?
    • Do you have a public IP address available to use?
    • Are you planning to use a VPN device? If so, is it compatible?
    • Are you connecting just a few computers, or do you want a persistent connection for your site?
    • What type of VPN gateway is required for the solution you want to create?
    • Which gateway SKU should you use?

    Reference link - https://docs.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-plan-design#planning

    ExpressRoute is a better choice to secure private connection between on premise to Azure and to offer a redundant pair of cross connections for high availability.

    Refer to the technical details from the FAQ link - https://docs.microsoft.com/en-us/azure/expressroute/expressroute-faqs#technical-details

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    Friday, March 16, 2018 12:04 PM
  • @Sadiqh Ahmed,

    I have read at some places that in the scenario I described above, the Azure Load Balancer is a better choice. So, could someone please explain, based on my scenario, why ExpressRoute is a better option than Azure Load Balancer?


    • Edited by namwam Friday, March 16, 2018 7:26 PM
    Friday, March 16, 2018 6:08 PM

  • ExpressRoute is a private, secure link to Azure via an Internet Exchange Provider (IXP) or a Network Service Provider (NSP). ExpressRoute connections do not go over the public Internet. They offer higher security, reliability, and speeds, with lower and consistent latencies than typical connections over the Internet. In some cases, using ExpressRoute connections to transfer data between on-premises devices and Azure can yield significant cost benefits. Each Express Route circuit has a redundant pair of cross connections configured to provide high availability. You will not lose connectivity if one of the cross connections fails. A redundant connection is available to support the load of your network. You can additionally create multiple circuits in a different peering location to achieve failure resilience.
    More details on Azure Expressroute dedicated circuit SLA. You may also want to refer this article on ExpressRoute Circuit And Load Balancing In Azure.
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    • Proposed as answer by Nirushi J Thursday, March 29, 2018 5:19 PM
    Saturday, March 17, 2018 3:25 PM
  • All reasoning and logic points to express route. Costly but they are fast, secure.

    Friday, June 15, 2018 5:48 PM