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Oracle Linux: How to Troubleshoot Network Issues (Doc ID 2686449.1)

Last updated on OCTOBER 11, 2022

Applies to:

Linux OS - Version Oracle Linux 6.0 and later
Oracle Cloud Infrastructure - Version N/A and later
Linux x86
Linux x86-64

Purpose

The purpose of this document is to provide basic guidance to troubleshoot network issues in Oracle Linux (i.e, performance), specifically when having network problems that suddenly may appear in a production or test environment.

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
 A. Basic Troubleshooting Steps. 
 1. Check network changes
 2. Isolate connection problems
 Identifying link status
 Run a ping test
 Run nc and telnet
 Run netstat
 Verify Route and Default Gateway
 Run traceroute
 Check DNS configuration
 Check network configuration files
 Check Network Bond configuration
 3. Run iperf test
 4. Collect a tcpdump
 B. Changes to consider.
 1. Try to ENABLE/DISABLE, LRO/GRO/TSO features
 2. Change TCP Parameter Settings
 C. Possible approaches (OPTIONAL)
 Conclusion
References

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