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Submission: On October 13 via manual from JP — Scanned from JP
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1. Learn
2. Azure
3. Networking
4. Route Server
1. Learn
2. Azure
3. Networking
4. Route Server
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Table of contents
WHAT IS AZURE ROUTE SERVER?
* Article
* 09/27/2023
* 7 contributors
Feedback
IN THIS ARTICLE
1. How does it work?
2. Key benefits
3. Route Server Limits
4. Pricing
5. Service Level Agreement (SLA)
6. FAQ
7. Related content
Show 3 more
Azure Route Server simplifies dynamic routing between your network virtual
appliance (NVA) and your virtual network. It allows you to exchange routing
information directly through Border Gateway Protocol (BGP) routing protocol
between any NVA that supports the BGP routing protocol and the Azure Software
Defined Network (SDN) in the Azure Virtual Network (VNet) without the need to
manually configure or maintain route tables. Azure Route Server is a fully
managed service and is configured with high availability.
Important
Azure Route Servers created before November 1, 2021, that don't have a public IP
address associated, are deployed with the public preview offering. The public
preview offering is not backed by General Availability SLA and support. To
deploy Azure Route Server with the General Availability offering, and to achieve
General Availability SLA and support, please delete and recreate your Route
Server.
HOW DOES IT WORK?
The following diagram illustrates how Azure Route Server works with an SDWAN NVA
and a security NVA in a virtual network. Once you've established the BGP
peering, Azure Route Server will receive an on-premises route (10.250.0.0/16)
from the SDWAN appliance and a default route (0.0.0.0/0) from the firewall.
These routes are then automatically configured on the VMs in the virtual
network. As a result, all traffic destined to the on-premises network will be
sent to the SDWAN appliance, while all Internet-bound traffic will be sent to
the firewall. In the opposite direction, Azure Route Server will send the
virtual network address (10.1.0.0/16) to both NVAs. The SDWAN appliance can
propagate it further to the on-premises network.
KEY BENEFITS
Azure Route Server simplifies configuration, management, and deployment of your
NVA in your virtual network.
* You no longer need to manually update the routing table on your NVA whenever
your virtual network addresses are updated.
* You no longer need to update User-Defined Routes manually whenever your NVA
announces new routes or withdraw old ones.
* You can peer multiple instances of your NVA with Azure Route Server. You can
configure the BGP attributes in your NVA and, depending on your design (for
example, active-active for performance or active-passive for resiliency), let
Azure Route Server know which NVA instance is active or which one is passive.
* The interface between NVA and Azure Route Server is based on a common
standard protocol. As long as your NVA supports BGP, you can peer it with
Azure Route Server. For more information, see Route Server supported routing
protocols.
* You can deploy Azure Route Server in any of your new or existing virtual
network.
ROUTE SERVER LIMITS
Azure Route Server has the following limits (per deployment).
Resource Limit Number of BGP peers 8 Number of routes each BGP peer can
advertise to Azure Route Server 1 1,000 Number of VMs in the virtual network
(including peered virtual networks) that Azure Route Server can support 2 4,000
Number of virtual networks that Azure Route Server can support 250 Number of
virtual network prefixes that Azure Route Server can support 400
1 If your NVA advertises more routes than the limit, the BGP session gets
dropped.
2 The number of VMs that Azure Route Server can support isn’t a hard limit and
it depends on the availability and performance of the underlying infrastructure.
Note
The total number of routes advertised from VNet address space and Route Server
towards ExpressRoute circuit, when Branch-to-branch enabled, must not exceed
1,000. For more information, see Route advertisement limits of ExpressRoute.
PRICING
For pricing details, see Azure Route Server pricing.
SERVICE LEVEL AGREEMENT (SLA)
For service level agreement details, see SLA for Azure Route Server.
FAQ
For frequently asked questions about Azure Route Server, see Azure Route Server
FAQ.
RELATED CONTENT
* To learn how to create and configure Azure Route Server, see Quickstart:
Create and configure Route Server using the Azure portal.
* To learn how Azure Route Server works with Azure ExpressRoute and Azure VPN,
see Azure Route Server support for ExpressRoute and Azure VPN.
* Training module: Introduction to Azure Route Server.
* Azure Architecture Center: Update route tables by using Azure Route Server.
FEEDBACK
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--------------------------------------------------------------------------------
ADDITIONAL RESOURCES
--------------------------------------------------------------------------------
Documentation
* Tutorial: Configure peering between Azure Route Server and Network Virtual
Appliance
This tutorial shows you how to configure an Azure Route Server and peer it
with a Network Virtual Appliance (NVA) using the Azure portal.
* Scenario: Route traffic through a Network Virtual Appliance (NVA) - Azure
Virtual WAN
Learn about Virtual WAN routing scenarios to route traffic through a Network
Virtual Appliance (NVA).
* Azure Route Server frequently asked questions (FAQ)
Find answers to frequently asked questions about Azure Route Server.
* About Route-maps - Azure Virtual WAN
Learn about Virtual WAN Route-maps.
* About ExpressRoute Connections in Azure Virtual WAN
Learn about using ExpressRoute in Azure Virtual WAN to connect your Azure and
on-premises environments.
* Azure Virtual WAN FAQ
See answers to frequently asked questions about Azure Virtual WAN networks,
clients, gateways, devices, partners, and connections.
* Configure ExpressRoute encryption: IPsec over ExpressRoute for Azure Virtual
WAN
Learn how to use Azure Virtual WAN to create a site-to-site VPN connection
over ExpressRoute private peering.
* What's new in Azure Virtual WAN?
Learn what's new with Azure Virtual WAN such as the latest release notes,
known issues, bug fixes, deprecated functionality, and upcoming changes.
Show 5 more
--------------------------------------------------------------------------------
Training
Module
Introduction to Azure Route Server - Training
Evaluate whether Microsoft Azure Route Server is appropriate for resolving
delays and outages in network communication.
English (United States)
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* Previous Versions
* Blog
* Contribute
* Privacy
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* Trademarks
* © Microsoft 2023
ADDITIONAL RESOURCES
--------------------------------------------------------------------------------
Training
Module
Introduction to Azure Route Server - Training
Evaluate whether Microsoft Azure Route Server is appropriate for resolving
delays and outages in network communication.
--------------------------------------------------------------------------------
Documentation
* Tutorial: Configure peering between Azure Route Server and Network Virtual
Appliance
This tutorial shows you how to configure an Azure Route Server and peer it
with a Network Virtual Appliance (NVA) using the Azure portal.
* Scenario: Route traffic through a Network Virtual Appliance (NVA) - Azure
Virtual WAN
Learn about Virtual WAN routing scenarios to route traffic through a Network
Virtual Appliance (NVA).
* Azure Route Server frequently asked questions (FAQ)
Find answers to frequently asked questions about Azure Route Server.
* About Route-maps - Azure Virtual WAN
Learn about Virtual WAN Route-maps.
* About ExpressRoute Connections in Azure Virtual WAN
Learn about using ExpressRoute in Azure Virtual WAN to connect your Azure and
on-premises environments.
* Azure Virtual WAN FAQ
See answers to frequently asked questions about Azure Virtual WAN networks,
clients, gateways, devices, partners, and connections.
* Configure ExpressRoute encryption: IPsec over ExpressRoute for Azure Virtual
WAN
Learn how to use Azure Virtual WAN to create a site-to-site VPN connection
over ExpressRoute private peering.
* What's new in Azure Virtual WAN?
Learn what's new with Azure Virtual WAN such as the latest release notes,
known issues, bug fixes, deprecated functionality, and upcoming changes.
Show 5 more
IN THIS ARTICLE
English (United States)
Theme
* Light
* Dark
* High contrast
*
* Previous Versions
* Blog
* Contribute
* Privacy
* Terms of Use
* Trademarks
* © Microsoft 2023