What is near end loopback?

What is near end loopback?

What is near end loopback?

Near-end loopback mode involves traffic flow over the GMII/RGMII interface, so a breakout of the MAC interface on SAMTEC connector J1 must be connected to another system for this mode to pass traffic.

What is the loopback interface?

A loopback interface is a virtual interface that is always up and reachable as long as at least one of the IP interfaces on the switch is operational. As a result, a loopback interface is useful for debugging tasks since its IP address can always be pinged if any other switch interface is up.

What is the purpose of loopback interface?

The loopback interface is used to identify the device. While any interface address can be used to determine if the device is online, the loopback address is the preferred method. Whereas interfaces might be removed or addresses changed based on network topology changes, the loopback address never changes.

What is PCS and PMA?

The PCS is responsible for encoding each octet passed down from the GMII into ten bit code groups. The PMA is responsible for serializing each ten bit code group received from the PCS and sending the serialized data to the PMD.

What is IP loopback address?

A loopback address is a special IP address, 127.0. 0.1, reserved by InterNIC for use in testing network cards. This IP address corresponds to the software loopback interface of the network card, which does not have hardware associated with it, and does not require a physical connection to a network.

What is PCS error?

PCS errors are always counted from the incoming direction at the receiving node. The Physical Coding Sublayer (PCS) Errored blocks and bit errors are usually caused by the physical layer with either bad Fiber or bad XFP. In some instances, the same behavior is seen when the Optics RX power is low on the Receiver side.

What is PMA in serdes?

SERDES Architecture The SERDES is primarily comprised of the Physical Medium Dependent (PMD) sublayer, the Physical Media Attachment (PMA) sublayer and the Physical Coding Sublayer (PCS). The PMD is the electrical block responsible for the serial signal transmission.