How to force file transfer traffic over a specific Nic?

Question

How to force file transfer traffic over a specific Nic. The server is having 1 Gbps and 10 Gbps cards respectively. And 1 Gbps card is serving for enterprise networking with AD.

Answer 1

Add a route to the local route table.

https://serverfault.com/questions/439806/force-traffic-out-a-specific-nic-on-same-network

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hth

Marcin

Answer 2

To force file transfer traffic over a specific network interface card (NIC) on a server with multiple NICs of varying speeds (1 Gbps and 10 Gbps), you can use network routing and prioritization techniques. Here's a general approach:

Identify the NICs: Ensure you know which NIC is the 1 Gbps card and which one is the 10 Gbps card on your server.

Configure Routing Tables: You can configure routing tables to prioritize traffic over a specific NIC based on destination IP addresses or subnets. For example, if your file transfer traffic goes to specific IP addresses or subnets, you can route that traffic through the 10 Gbps NIC.

On Linux:

      Use the **`ip route add`** command to add routes for specific destinations via the desired NIC.
     
            For example, **`sudo ip route add <destination> via <gateway> dev <NIC>`**.
           
              On Windows:
              
                     Use the **`route add`** command to add routes for specific destinations via the desired NIC.
                    
                           For example, **`route add <destination> mask <subnet_mask> <gateway> metric <metric_value> if <interface_index>`**.
                          
                          **Traffic Prioritization:** You can also prioritize traffic using Quality of Service (QoS) settings if your network infrastructure supports it. QoS allows you to prioritize certain types of traffic over others based on criteria such as IP addresses, protocols, or ports.
                          
                              Configure QoS policies to prioritize file transfer traffic over the 10 Gbps NIC.
                             
                                 QoS settings are typically configured on routers or switches in the network path.
                                
                                **Testing and Monitoring:** After configuring routing and prioritization, test the setup by initiating file transfers and monitoring the network traffic to ensure that the desired NIC is handling the traffic as expected.
                                

Remember to consider network security and performance implications when making these changes, especially if you're modifying routing tables and QoS settings. It's recommended to test any configuration changes in a controlled environment before applying them in a production environment.

Answer 3

Hello，

To direct file transfer traffic through a specific network interface card (NIC), you can follow these steps:

1. Make sure you assign a different IP address to each NIC.
2. Then open the command prompt with administrative rights and use the command route print to view the existing routing table.
3. Find the default route (0.0.0.0) and note the interface (IF) number associated with it.
4. Identify the IP address or host that you want to route through the NIC and add a static route for this specific IP address.

Reference link: networking - Routing traffic to a specific NIC in Windows - Server Fault

I hope the information above is helpful.

Best Regards,

Yanhong Liu

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