[TechNotes] Troubleshooting Slow Internet Access Issues for AR Routers

【Introduction】

With the widespread use of the Internet, many activities are performed on the Internet, such as entertainment, gaming, learning, and shopping. Internet access has become a routine in people's daily life. During Internet access, many users may have encountered issues caused by slow Internet access, for example, slow web page loading and video freezing. This document describes how to address slow Internet access issues. Before that, you need to understand basic network information, including the Internet access mode, theoretical network speed, and network speed test.

【Contents】

• Scenarios Where the Internet Access Speed Is Low

• Why Is the Wired Network Speed Low?

• Troubleshooting Slow Internet Access Issues in Single-Egress Scenarios

  • Some Web Pages Are Slowly Opened Due to Packet Fragmentation

  • Session Resources of the Device Are Exhausted Due to Heavy Private Network Traffic

  • Internet Access Is Intermittently Interrupted Due to ARP Attacks on the Private Network

  • Public Network Interface Status Is Abnormal

• Troubleshooting Slow Internet Access Issues in Dual- or Multi-Egress Scenarios

  • Routes Are Not Invalidated After Dialup Fails on the Dialer Interface

  • Forward and Return Paths of Packets Received on the Public Network Interface Are Inconsistent

  • Slow Internet Access When Links Work in Load Balancing Mode

  • Slow Internet Access When Links Work in Active/Standby Mode

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