Managing Reflectors

Updated on 21 Jun 2024
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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, Skylight 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 ▶ Reflectors page:

Accedian Skylight elements
Accedian Skylight sensor: modules
Any device capable of reflecting standard Echo, ETH-OAM (Y.1731 and IEEE802.1ag) or TWAMP sessions
Accedian 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 ▶ Reflectors. A list of all reflectors that have already been defined on Skylight orchestrator is displayed.

Devices ▶ Reflectors page
Managing Reflectors.png

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 ▶ 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 Skylight 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. twamp-rf (stateful TWAMP) twamp-sl-rf (stateless TWAMP) Echo Sessions: echo-udp-rf echo-icmp-rf Ethernet OAM Sessions: ethlb-rf ethdm-rf ethvs-rf 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: 2xOneWay-RF P1404 P2440 P2770 Skylight sensor: control Skylight sensor: SFP computes (1G or 10G) Skylight sensor: modules (1G or 10G) Skylight elements: LT, LT-S, GT, GX, LX and others The following options are suitable for third-party devices: HeadEnd Server Host Router Switch RBS (Radio Base Station)

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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