EC2 Network Timeout Diagnostic Troubleshooter (Part 2)
Use the interactive troubleshooter below to identify your EC2 network timeout symptom, review the raw evidence, understand the root cause, and apply the recommended fix.
🚨 Step 1: What specific error symptom are you experiencing?
Please click the most accurate description:
Quick Reference Table
| # | Scenario | Key Error Signal | Root Cause | The Fix |
|---|---|---|---|---|
| 4 | timed out — Connection timed out: connect (missing route to internet gateway) | Error connecting to [instance], reason: -> Connection timed out: connect | The subnet's route table is missing a route that sends traffic destined outside the VPC to the internet gateway. | Edit the subnet's route table to add a route using 0.0.0.0/0 (or ::/0 for IPv6) as the destination and the VPC's internet gateway as the target. |
| 5 | timeout — tx_timeout: Netdev watchdog transmit timeout | tx_timeout: 0 (ethtool -S ethN) | The Netdev watchdog was activated due to a transmit timeout on the ENA network interface. | N/A |
| 6 | timeout — XDP transmit queue missed completion timeout | queue_N_xdp_tx_missed_tx: N (ethtool -S ethN) | A transmit queue entry failed because it missed a completion timeout for the specified XDP transmit queue. | N/A |