DCONFAIL DTLS Connection Failure

D.

The DCONFAIL error message is related to the DTLS (Datagram Transport Layer Security) protocol. DTLS is a variant of TLS (Transport Layer Security) protocol that is used to provide secure communication over UDP (User Datagram Protocol) connections. It is commonly used in Cisco SD-WAN solutions to secure traffic between vEdge routers.

The DCONFAIL error message indicates that the vEdge router failed to establish a DTLS connection with the remote peer. This could be due to various reasons, including:

A. Memory Issue: If the vEdge router is running low on memory or if the memory is corrupted, it could cause issues with DTLS connections.

B. Certificate Mismatch: If the vEdge router and the remote peer have different certificates or if the certificates are not trusted, it could cause a DTLS connection failure.

C. Organization Mismatch: If the vEdge router and the remote peer are not part of the same organization, it could cause issues with DTLS connections.

D. Connectivity Issue: If there is a network connectivity issue between the vEdge router and the remote peer, it could cause a DTLS connection failure.

To troubleshoot the DCONFAIL error message, the engineer should first check the vEdge router's logs for more information about the error. They should also check the memory usage of the router to ensure that it is not running low on memory. Next, they should verify that the certificates on the vEdge router and the remote peer are correct and trusted. They should also check that the vEdge router and the remote peer are part of the same organization. Finally, they should check the network connectivity between the vEdge router and the remote peer to ensure that there are no issues.

Based on the given options, the most likely causes of the DCONFAIL error message are B. certificate mismatch or D. connectivity issue. However, further troubleshooting is needed to determine the exact cause of the issue.