Reflectors are network devices that are used in performance sessions to reflect the packets in a measurement stream. When you create a performance session, you must select a reflector as part of the session setup.
As a convenience, Legacy Orchestrator allows you to maintain a list of devices that can be used as reflectors in performance sessions. When you add a new performance session, you will be able to select a reflector from the system's list of reflector devices.
You can add the following types of device to the list of reflectors displayed in the Devices â–¶ Reflectors page:
- Cisco Provider Connectivity Assurance Sensors
- Cisco Provider Connectivity Assurance Sensor Modules
- Any device capable of reflecting standard Echo, ETH-OAM (Y.1731 and IEEE802.1ag) or TWAMP sessions
- Cisco reflector agent integrated into a third-party device.
Note: It is also possible to add a device to the system list of reflectors on the fly when you are adding a new performance session. See "Adding and Editing Performance Sessions".
To view the list of existing reflectors
Select Devices â–¶ Reflectors. A list of all reflectors that have already been defined on Legacy Orchestrator is displayed.
Devices â–¶ Reflectors page
To add a new reflector or edit an existing reflector
-
Click the Add Reflector
button (above top left corner of the list) to add a new reflector or double-click an existing reflector to edit its parameters.
The reflector configuration is displayed to the right of the list of reflectors. -
Set the parameters for the reflector.
For more information on specific parameters, see the table below this procedure. -
Click Create and then click Close.
The reflector is saved and displayed in the reflector list. The reflector is available for selection when a new performance session is created.
Reflector parameters (Devices â–¶ Reflectors)
| Parameter | Description |
|---|---|
| Name | Name of the device to be used as a reflector. Read from the device. |
| Label | User-defined label. Labels can be used to group devices. You can filter various lists in Legacy Orchestrator by including a label in the query. |
| Description | A free-form text that you can use as you wish. |
| IP address | IP address of the interface to be used as a reflector. |
| MAC address | MAC address of the interface. Read from the interface. |
| Capabilities | Indicates the types of session for which the interface can act as a reflector. Check all the reflection capabilities that apply to the device. TWAMP Sessions: Only check one of the TWAMP options. If you check both options, you will not be able to create the reflector.
Echo Sessions:
Ethernet OAM Sessions:
To determine the reflection capabilities of Accedian devices, see "Sender and Reflector Capabilities of Accedian Devices". To determine the reflection capabilities of third party devices, see the manufacturer’s documentation. |
| Product | Indicates the product category of the device. The following options are suitable for Accedian devices:
The following options are suitable for third-party devices:
|
TWAMP control (only enabled if one of the TWAMP options is selected for Capabilities)
| Parameter | Description |
|---|---|
| Enable | Enables use of the TWAMP-Control protocol. TWAMP-Control can be used with stateful and stateless reflectors. For more information about TWAMP sessions and the TWAMP-Control protocol, see "TWAMP Sessions". |
| IP address | The IP address of the TWAMP-Control Server. Typically, the TWAMP-Control Server resides on the reflector. If this field is left blank, TWAMP-Control messages will be sent to the management IP address of the reflector. If you specify a different IP address for the TWAMP-Control server, the TWAMP-Control messages will be sent to the specified address. |
| Port | The number of the UDP port to be used on the TWAMP-Control Server for control messages. The default port is 862. |
| DSCP | Sets the traffic classification method to use when transmitting TWAMP-Control messages. You can use the drop-down list in either of two ways: |
| VLAN priority | Sets the VLAN priority to use when transmitting TWAMP-Control messages. The default VLAN priority is 0. |
| Legacy Mode | Check this box if the reflector does not accept current Time-of-Day as the STARTTIME parameter in the TWAMP-Control protocol setup. |
To delete a reflector
- Select a reflector in the Reflectors list.
- Click the Remove reflectors
button (above top left corner of the list). - Click OK in the confirmation dialog to remove the reflector from the list.
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