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Ethernet Configuration Testing Protocol is a diagnostic protocol included in the Xerox Ethernet II specification. [1] Functionality of the protocol is similar to that offered by ping but it operates at the data link layer as opposed to the network layer. Ethernet Configuration Testing Protocol was implemented on DEC hosts and Cisco routers. [2]
IEEE 802.1ag is an amendment to the IEEE 802.1Q networking standard which introduces Connectivity Fault Management (CFM).This defines protocols and practices for the operations, administration, and maintenance (OAM) of paths through 802.1 bridges and local area networks (LANs).
This is called a loopback test and can be performed within a modem or transceiver by connecting its output to its own input. A circuit between two points in different locations may be tested by applying a test signal on the circuit in one location, and having the network device at the other location send a signal back through the circuit. If ...
ITU-T Y.1564 is designed to serve as a network service level agreement (SLA) validation tool, ensuring that a service meets its guaranteed performance settings in a controlled test time, to ensure that all services carried by the network meet their SLA objectives at their maximum committed rate, and to perform medium- and long-term service testing, confirming that network elements can properly ...
Similar functionality in a standardized form is provided as part of the Ethernet OAM protocol that is defined as part of the Ethernet in the First Mile changes to 802.3 (previously 802.3ah). D-Link has their DULD feature built on top of Ethernet OAM function. Brocade devices running Ironware support a proprietary form of UDLD.
EtherType is a two-octet field in an Ethernet frame.It is used to indicate which protocol is encapsulated in the payload of the frame and is used at the receiving end by the data link layer to determine how the payload is processed.
This allows the company to test the line from the central telephone exchange, without the need to have test equipment at the customer site. The telephone company usually has the ability to remotely activate loopback, without even needing personnel at the customer site. When looped back, the customer equipment is disconnected from the line.
A LAG is a method of inverse multiplexing over multiple Ethernet links, thereby increasing bandwidth and providing redundancy. It is defined by the IEEE 802.1AX-2008 standard, which states, "Link Aggregation allows one or more links to be aggregated together to form a Link Aggregation Group, such that a MAC client can treat the Link Aggregation Group as if it were a single link."