User's Guide Part 1

Table Of Contents

Chapter 1: Product description Ethernet bridging

For information about…

Refer to…

How to configure the Ethernet service LAN Configuration page on page 6-34

How to configure Ethernet quality of service QoS Configuration page on page 6-44

How to monitor Ethernet performance System statistics on page 7-47

Ethernet loopback mode

PTP 700 provides a local Ethernet loopback function that can be used to loop traffic between

the Aux Port and one of the other Ethernet ports.

Loopback is intended to assist in the commissioning of a camera or other auxiliary device

collocated with the PTP 700 ODU. For example, when setting up a camera which will ultimately

be connected to the wireless bridge, it may be useful to loop the data back to a second local

interface, to assist in the positioning and alignment of the camera.

When ports are configured for Ethernet local loopback, they are temporarily disconnected from

their allocated function and connected together internally within the PTP 700 ODU. The

Management Service and Local Management Service are disconnected from a port configured

for loopback. In this case, it will not be possible to manage the ODU from a local Ethernet port.

For this reason the Ethernet loopback is always disabled when the ODU is rebooted or power-

cycled, restoring the previous port configuration and any associated management paths.

During loopback operation, the same frame size restrictions that apply to management traffic

are present, jumbo frames are not supported and the maximum frame size is restricted to

1536 bytes.

Loopback is able to loop between Ethernet ports operating at different line rates if required,

and it is possible to configure a Loopback between ports operating at 1000BASE-T/LX/SX and

100BASE-TX if needed.