Verify Crypto Map Sequence Numbers and Name Verify that ACLs are Correct and are Binded to Crypto Map Verify that sysopt Commands are Present (/ASA Only) This section contains solutions to the most common IPsec VPN problems.Īlthough they are not listed in any particular order, these solutions can be used as a checklist of items to verify or try before you engage in in-depth remediation.Īll of these solutions come directly from TAC service requests and have resolved numerous issues.Ĭlear Old or Existing Security Associations (Tunnels) IPsec VPN Configuration Does Not Work ProblemĪ recently configured or modified IPsec VPN solution does not work.Ī current IPsec VPN configuration no longer works. Refer to Cisco Technical Tips Conventionsfor more information on document conventions. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration.

The information in this document was created from the devices in a specific lab environment.

The information in this document is based on these software and hardware versions: Prerequisites RequirementsĬisco recommends knowledge of IPsec VPN configuration on these Cisco devices: It is recommended that these solutions be implemented with caution and in accordance with your change control policy. Warning: Many of the solutions presented in this document can lead to a temporary loss of all IPsec VPN connectivity on a device. Note: ASA does not pass multicast traffic over IPsec VPN tunnels. Refer to IP Security Troubleshooting - Understanding and Using debug Commandsfor an explanation of common debug commands that are used to troubleshoot IPsec issues on both the Cisco IOS ® software and.

This document provides a summary of common procedures to try before you begin to troubleshoot a connection.Īlthough the configuration examples in this document are for use on routers and security appliances, nearly all of these concepts are also applicable to the VPN 3000. Many of these solutions are implemented prior to the in-depth troubleshooting of an IPsec VPN connection. The solutions described here come directly from service requests that the Cisco Technical Support have solved. This document describes the most common solutions to IPsec VPN problems.

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