# CDN integration log analysis and error code reference for MediaTailor
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AWS Elemental MediaTailor content delivery network (CDN) integration logs provide valuable insights into performance and errors. This guide covers both CDN logs (from your content delivery network) and MediaTailor logs and error codes that are relevant to CDN integration troubleshooting. Use this reference when you need to understand what your content delivery network logs and error codes are telling you about your MediaTailor integration. This guide helps you interpret log entries and error messages to identify the root cause of issues.

**Related topics:**
+ For step-by-step troubleshooting procedures, see [Troubleshoot CDN integration](cdn-troubleshooting.md)
+ For proactive monitoring and prevention strategies, see [Monitor MediaTailor CDN operations and performance](cdn-monitoring.md)
+ For escalation and getting additional help, see [Get CDN integration support](cdn-get-help.md)
+ For comprehensive MediaTailor logging configuration and resources, see [MediaTailor logging configuration resources](#mediatailor-logging-resources)
+ For CloudFront log format reference, see [CloudFront access log format](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/AccessLogs.html#LogFileFormat)
+ For HTTP status code reference, see [HTTP response status codes](https://developer.mozilla.org/en-US/docs/Web/HTTP/Status)

**Topics**
+ [CDN log interpretation](cdn-log-interpretation.md)
+ [Error codes reference](emt-error-codes-reference.md)
+ [Log analysis tools](log-analysis-techniques.md)
+ [MediaTailor logging configuration resources](#mediatailor-logging-resources)

## MediaTailor logging configuration resources
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In addition to CDN logs, MediaTailor provides comprehensive logging capabilities for monitoring ad insertion, manifest generation, and service interactions. Use these resources to configure and analyze MediaTailor logs:

MediaTailor manifest and service logs  
Configure and analyze logs for manifest generation, origin interactions, and service events:  
+ [AWS Elemental MediaTailor manifest logs description and event types](log-types.md) - Complete reference for MediaTailor manifest logs and event types
+ [Viewing AWS Elemental MediaTailor logs](monitoring-through-logs.md) - Guide to viewing and interpreting MediaTailor logs

Vended logs configuration  
Configure flexible log delivery to multiple destinations with cost optimization:  
+ [Using vended logs to send AWS Elemental MediaTailor logs](vended-logs.md) - Configure log delivery to Amazon S3, Firehose, or CloudWatch Logs
+ [Migrating your AWS Elemental MediaTailor logging strategy](vended-logs-migrate.md) - Migration guide for existing logging configurations

CloudWatch Logs integration  
Integrate MediaTailor logs with CloudWatch for monitoring and analysis:  
+ [Viewing AWS Elemental MediaTailor logs](monitoring-through-logs.md) - CloudWatch Logs configuration and analysis
+ [CloudWatchInsights](https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/AnalyzingLogData.html) - Advanced log querying and analysis

Ad-specific logging  
Monitor ad insertion performance and troubleshoot ad-related issues:  
+ ADS interaction logs - Monitor ad decision server communication and errors

**Key differences between CDN and MediaTailor logs:**
+ **CDN logs**: Show request/response patterns, cache behavior, and network-level errors from your content delivery network
+ **MediaTailor logs**: Show ad insertion details, manifest generation events, origin interactions, and service-specific errors
+ **Combined analysis**: Use both log types together for complete visibility into your streaming workflow

For comprehensive monitoring that combines both CDN and MediaTailor logging, see [Monitor MediaTailor CDN operations and performance](cdn-monitoring.md).