If your ISP uses PPPoE (common), you must have these credentials.
Your personal router is underpowered, or you are hitting a PPPoE software bottleneck. Solution: Ensure your personal router has a CPU powerful enough to handle gigabit PPPoE. Older routers (e.g., low-end TP-Link models) may struggle with PPPoE decryption, whereas the ZTE’s hardware offloaded it well. Upgrade your router or switch to a device with hardware NAT acceleration.
ZTE F689 Bridge Mode Configuration: A Comprehensive Guide The is a high-performance GPON Optical Network Terminal (ONT) frequently deployed by Internet Service Providers (ISPs) to provide fiber internet, voice, and sometimes TV services. While it functions well as an all-in-one gateway, many advanced users, gamers, or those with large homes prefer to use their own high-end router (like ASUS, Netgear, or Ubiquiti) to manage their network.
Elias wanted control. He had bought a high-end enterprise-grade router, a sleek black monolith capable of handling the traffic of a small office. But the ZTE F689 refused to play nice. Every time he plugged his new router in, he created a "Double NAT"—two traffic cops yelling at each other while the cars piled up.
Before we touch the configuration page, let’s understand the problem. The ZTE F689 typically operates in (or PPPoE mode). This means it logs into your ISP using a username and password, assigns local IP addresses (via DHCP), and manages network traffic. Zte F689 Bridge Mode
If true Bridge Mode isn't available, use IP Passthrough (DMZ). This isn't perfect (it still involves Double NAT), but it works for most users.
Depending on the specific firmware version loaded by your ISP, you will either modify the existing profile or create a new one. Method A: Modifying the Existing Profile
Click or Add to populate a blank configuration profile. Apply these explicit settings:
Set the Wireless RF Mode to for both the 2.4 GHz and 5 GHz bands. Click Submit . Navigate to Network > LAN > DHCP Server . Uncheck Enable DHCP Server . Click Submit . If your ISP uses PPPoE (common), you must
Locate the dropdown menu labeled or Connection Type . Change the value from Route (or PPPoE/DHCP) to Bridge .
Before you begin, ensure you have the following:
You must tell the ZTE F689 which physical LAN port will output the bridged internet signal to your new router.
Within the same WAN menu, look for or LAN Binding . Older routers (e
Putting your ZTE F689 into bridge mode is the single most impactful networking upgrade you can make for free. It transforms a locked-down, mediocre all-in-one device into a silent, high-speed signal pass-through.
Before modifying or deleting any rules, document your working configuration. Navigate to > WAN > WAN Connection .
Once DHCP is turned off and the device is bridged, it will no longer give your computer an IP address automatically.
Running two routers creates two layers of Network Address Translation (NAT). This often causes issues with online gaming, VPN connections, and smart home devices. Bridge mode solves this instantly.