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Create an AWS Account
 1. AWS
 2. ...
    
    
 3. Documentation
 4. AWS VPN
 5. User Guide

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AWS SITE-TO-SITE VPN


USER GUIDE

 * What is Site-to-Site VPN
 * How AWS Site-to-Site VPN works
    * VPN tunnel options
    * VPN tunnel authentication options
    * VPN tunnel initiation options
    * Endpoint replacements
       * Tunnel endpoint lifecycle
   
    * Customer gateway options
    * Accelerated VPN connections
    * Site-to-Site VPN routing options
       * IPv4 and IPv6 traffic

 * Getting started tutorial
 * Architectures
    * Single and multiple VPN connections
    * AWS VPN CloudHub
    * Redundant VPN connections

 * Your customer gateway device
    * Example configurations for static routing
    * Example configurations for dynamic routing (BGP)
    * Windows Server as a customer gateway device
    * Troubleshooting
       * Device with BGP
       * Device without BGP
       * Cisco ASA
       * Cisco IOS
       * Cisco IOS without BGP
       * Juniper JunOS
       * Juniper ScreenOS
       * Yamaha

 * Work with Site-to-Site VPN
    * Create a VPN attachment for AWS Cloud WAN
    * Create a transit gateway VPN attachment
    * Test a VPN connection
    * Delete a VPN connection
    * Modify the target gateway of a VPN connection
    * Modify VPN connection options
    * Modify VPN tunnel options
    * Edit static routes for a VPN connection
    * Change the customer gateway for a VPN connection
    * Replace compromised credentials
    * Rotate VPN tunnel endpoint certificates
    * Private IP VPN with AWS Direct Connect

 * Security
    * Data protection
    * Identity and access management
       * How AWS Site-to-Site VPN works with IAM
       * Identity-based policy examples
       * Troubleshooting
       * Using service-linked roles
   
    * Resilience
    * Infrastructure security

 * Monitoring your Site-to-Site VPN connection
    * AWS Site-to-Site VPN logs
       * Contents of Site-to-Site VPN logs
   
    * Monitoring VPN tunnels using Amazon CloudWatch
    * Monitoring VPN connections using AWS Health events

 * Quotas
 * Document history

Site-to-Site VPN tunnel endpoint replacements - AWS Site-to-Site VPN
AWSDocumentationAWS VPNUser Guide
Customer initiated endpoint replacementsAWS managed endpoint replacements


SITE-TO-SITE VPN TUNNEL ENDPOINT REPLACEMENTS

PDFRSS

Your Site-to-Site VPN connection consists of two VPN tunnels for redundancy.
Sometimes, one or both of the VPN tunnel endpoints is replaced when AWS performs
tunnel updates, or when you modify your VPN connection. During a tunnel endpoint
replacement, connectivity over the tunnel might be interrupted while the new
tunnel endpoint is provisioned.

TOPICS

 * Customer initiated endpoint replacements
 * AWS managed endpoint replacements
 * Tunnel endpoint lifecycle control


CUSTOMER INITIATED ENDPOINT REPLACEMENTS

When you modify the following components of your VPN connection, one or both of
your tunnel endpoints is replaced.

Modification API action Tunnel impact Modify the target gateway for the VPN
connection ModifyVpnConnection Both tunnels are unavailable while new tunnel
endpoints are provisioned. Change the customer gateway for the VPN connection
ModifyVpnConnection Both tunnels are unavailable while new tunnel endpoints are
provisioned. Modify the VPN connection options ModifyVpnConnectionOptions Both
tunnels are unavailable while new tunnel endpoints are provisioned. Modify the
VPN tunnel options ModifyVpnTunnelOptions The modified tunnel is unavailable
during the update.


AWS MANAGED ENDPOINT REPLACEMENTS

AWS Site-to-Site VPN is a managed service, and periodically applies updates to
your VPN tunnel endpoints. These updates happen for a variety of reasons,
including the following:

 * To apply general upgrades, such as patches, resiliency improvements, and
   other enhancements

 * To retire underlying hardware

 * When automated monitoring determines that a VPN tunnel endpoint is unhealthy

AWS applies tunnel endpoint updates to one tunnel of your VPN connection at a
time. During a tunnel endpoint update, your VPN connection might experience a
brief loss of redundancy. It’s therefore important to configure both tunnels in
your VPN connection for high availability.

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Document Conventions
VPN tunnel initiation options
Tunnel endpoint lifecycle
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