# Troubleshooting AWS Site-to-Site VPN customer gateway device
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When troubleshooting issues with your customer gateway device, it's important to have a structured approach. The first two topics in this section provide generalized flowcharts for troubleshooting issues when using a device configured for dynamic routing (BGP enabled), and a device configured for static routing (without BGP enabled), respectively. Following those topics are device-specific troubleshooting guides for Cisco, Juniper, and Yamaha customer gateway devices.

In addition to the topics in this section, enabling [AWS Site-to-Site VPN logs](monitoring-logs.md) can be very helpful for troubleshooting and resolving VPN connectivity issues. For general testing instructions, also see [Test an AWS Site-to-Site VPN connection](HowToTestEndToEnd_Linux.md).



**Topics**
+ [Device with BGP](Generic_Troubleshooting.md)
+ [Device without BGP](Generic_Troubleshooting_noBGP.md)
+ [Cisco ASA](Cisco_ASA_Troubleshooting.md)
+ [Cisco IOS](Cisco_Troubleshooting.md)
+ [Cisco IOS without BGP](Cisco_Troubleshooting_NoBGP.md)
+ [Juniper JunOS](Juniper_Troubleshooting.md)
+ [Juniper ScreenOS](Juniper_ScreenOs_Troubleshooting.md)
+ [Yamaha](Yamaha_Troubleshooting.md)

**Additional resources**
+ [Amazon VPC forum](https://repost.aws/tags/TATGuEiYydTVCPMhSnXFN6gA/amazon-vpc)