How to Set Up TMM Monitoring350

TMM (Transparent Monitoring Mode) is a feature of Cisco devices that allows you to monitor traffic without affecting the traffic itself. This can be useful for troubleshooting network issues, as it allows you to see all of the traffic that is passing through a device without having to make any changes to the network configuration.

To set up TMM, you will need to:1. Enable TMM on the device.
2. Create a SPAN session to mirror the traffic that you want to monitor.
3. Configure the device to send the mirrored traffic to the TMM port.
4. Connect a monitoring device to the TMM port.

Once you have completed these steps, you will be able to use the monitoring device to view all of the traffic that is passing through the TMM port. This can be helpful for troubleshooting network issues, as it allows you to see all of the traffic that is passing through a device without having to make any changes to the network configuration.

Enable TMM

To enable TMM, you will need to enter the following command in the CLI:```
configure terminal
monitor session 1 source interface GigabitEthernet 1/1
monitor session 1 destination interface GigabitEthernet 1/2
end
```
This command will enable TMM on the device and create a SPAN session to mirror the traffic on GigabitEthernet 1/1 to GigabitEthernet 1/2.

Create a SPAN Session

To create a SPAN session, you will need to enter the following command in the CLI:```
configure terminal
span session 1 source interface GigabitEthernet 1/1
span session 1 destination interface GigabitEthernet 1/2
end
```
This command will create a SPAN session that will mirror the traffic on GigabitEthernet 1/1 to GigabitEthernet 1/2.

Configure the Device to Send the Mirrored Traffic to the TMM Port

To configure the device to send the mirrored traffic to the TMM port, you will need to enter the following command in the CLI:```
configure terminal
monitor session 1 source interface GigabitEthernet 1/1
monitor session 1 destination interface GigabitEthernet 1/2
monitor session 1 monitor-port GigabitEthernet 1/3
end
```
This command will configure the device to send the mirrored traffic to the TMM port GigabitEthernet 1/3.

Connect a Monitoring Device to the TMM Port

Once you have completed the previous steps, you will need to connect a monitoring device to the TMM port. This can be done using a standard Ethernet cable.

Use the Monitoring Device to View the Traffic

Once you have connected a monitoring device to the TMM port, you will be able to use the monitoring device to view all of the traffic that is passing through the TMM port. This can be helpful for troubleshooting network issues, as it allows you to see all of the traffic that is passing through a device without having to make any changes to the network configuration.

2025-02-05

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