TL-AC4021-E66

Cause

MTU mismatch causing packet fragmentation

Fix Steps

1. Power cycle your router by unplugging for 30 seconds
2. Verify WAN cable is securely connected to router
3. Log into router admin panel at 192.168.1.1
4. Navigate to WAN/Internet settings and verify connection type
5. Re-enter your ISP credentials if using PPPoE

Related Errors

• WAX2116-20 – Netgear WAX2116-20 Connection Error
• GT3346 – Actiontec GT3346 Connection Error
• TL-AX9357-E92 – TP-Link TL-AX9357-E92 Connection Error
• WRT2084 – Linksys WRT2084 Connection Error