Troubleshooting
Problem
DNS issues generally will trigger an explicit "Failed to resolve" error log message when using IBM DataPower Gateway Appliances. However, if several DNS servers have been configured in the DNS server list, an error message may not be triggered if at least one of the DNS servers configured responds within the configured retry and timeout settings. If there is an intermittent latency observed for transactions that use DNS lookups over the network, it is recommended to validate the DNS servers are responding properly. This technotes provides information on how to troubleshoot suspected DNS issues using DataPower Gateway Appliances and what data should be gathered to help expedite problem resolution when engaging IBM Support.
Symptom
Transactions depending on DNS resolution of a hostname may fail due to DNS issues.
Some common DNS server problems are :
- DNS server does not respond, resulting in timeout
- DNS server responds incorrectly or fails to resolve hostname
- DNS server takes too long to respond
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Document Information
Modified date:
22 August 2024
UID
swg21499749