Configuring hot standby on the USG9000

Hot standby scenarios on the USG9000 are as follows:
1. Scenario 1:
Hot standby when USG service interfaces work at Layer 3 with switches serving as upstream and downstream devices.
For details, search for "Example 1: USG Service Interfaces Working at Layer 3 with Switches Serving as Upstream and Downstream Devices" in the USG9000 product documentation.

2. Scenario 2:
Hot standby when USG service interfaces work at Layer 3 with routers serving as upstream and downstream devices.
For details, search for "Example 2: USG Service Interfaces Working at Layer 3 with Routers Serving as Upstream and Downstream Devices" in the USG9000 product documentation.

3. Scenario 3:
Hot standby when USG service interfaces work at Layer 3 with the router serving as the upstream device and switch serving as the downstream device.
For details, search for "Example 3: USG Service Interfaces Working at Layer 3 with the Router Serving as the Upstream Device and Switch Serving as the Downstream Device" in the USG9000 product documentation.

4. Scenario 4:
Hot standby when USG service interfaces work at Layer 2 with routers serving as upstream and downstream devices.
For details, search for "Example 4: USG Service Interfaces Working at Layer 2 with Routers Serving as Upstream and Downstream Devices" in the USG9000 product documentation.

5. Scenario 5:
Switches serve as upstream and downstream devices, and hot standby is combined with NAT.
Search for "Example 5: Combining Hot Standby with NAT" in the USG9000 product documentation.

6. Scenario 6:
Load balancing when USG service interfaces work at Layer 3 with routers serving as upstream and downstream devices.
For details, search for "Example 6: USG Service Interfaces Working at Layer 3 with Routers Serving as Upstream and Downstream Devices" in the USG9000 product documentation.

7. Scenario 7:
Load balancing when USG service interfaces work at Layer 2 with routers serving as upstream and downstream devices.
For details, search for "Example 7: USG Service Interfaces Working at Layer 2 with Routers Serving as Upstream and Downstream Devices" in the USG9000 product documentation.

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